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1.
A. N. Chekhlov 《Journal of Structural Chemistry》2007,48(1):137-143
Two compounds, 7,13,16,21,24-hexaoxa-1,10-diazoniabicyclo[8.8.8]hexacosane bis(tribromide) and bis(bromodiiodide) — [H2(Crypt-222)]2+·2Br 3 ? (I) and [H2(Crypt-222)]2+·1.45(BrI2)?·0.4(Br2I)?·0.15 I 3 ? (II) — are prepared and characterized by single crystal XRD; the refinement of the second compound was more accurate. Isomorphous monoclinic structures (I, space group C2/c, Z = 4, a = 12.090, b = 15.833 Å, c = 15.732 Å, β = 95.83°; II, a = 12.548 Å, b = 16.417 Å, c = 15.748 Å, β = 94.53°) are solved by a direct method and refined in the anisotropic full-matrix approximation to R = 0.057 (I) and 0.044 (II) using all 2635 (I) and 2852 (II) measured independent reflections (automated CAD-4 diffractometer, λMoK α). In the structures of I and II one of the trihalide anions sits at the inversion center i(000), and the second trihalide anion and the dication [H2(Crypt-222)]2+ are situated at crystallographic axis 2. In the structure of II iodine is located in the center of trihalide anions, while the terminal atoms are disordered and are represented by a statistical combination of iodine and bromine atoms. 相似文献
2.
A. N. Chekhlov 《Russian Journal of Coordination Chemistry》2006,32(9):632-638
Two complexes, namely, (18-crown-6)bis(perchlorato-O,O′)strontium (I) and (18-crown-6)bis(perchlorato-O,O′)barium (II), are synthesized. Their crystal structures are determined by X-ray diffraction analysis. The structures of I (space group P21/c, a = 15.266 Å, b = 11.080 Å, c = 13.235 Å, β = 109.20°, Z = 4) and II (space group P21/n, a = 8.330 Å, b = 11.202 Å, c = 11.752 Å, β = 98.38°, Z = 2) are solved by a direct method and refined by the full-matrix least-squares method in the anisotropic approximation to R = 0.077 (I) and 0.041 (II) against 3714 (I) and 2478 (II) independent reflections (CAD-4 diffractometer, λMoK α radiation). Complex molecules [Sr(18C6)(ClO4)2] in the structure of I and [Ba(18C6)(ClO4)2] in II (in the inversion center)—are of the host-guest type. The Sr2+ or Ba2+ cation is localized in the center of a cavity of the 18-crown-6 ligand and coordinated by its all six O atoms. In compounds I and II, the coordination polyhedron of the Sr2+ and Ba2+ cations (coordination number 10) can be described as a distorted hexagonal bipyramid with two bifurcated vertices at two O atoms of two ClO 4 ? ligands, which are disordered in I and II and each of them has two orientations. 相似文献
3.
L. I. Kuznetsova N. I. Kuznetsova S. V. Koshcheev V. A. Rogov V. I. Zaikovskii B. N. Novgorodov L. G. Detusheva V. A. Likholobov D. I. Kochubey 《Kinetics and Catalysis》2006,47(5):704-714
The transformations of platinum and a heteropoly acid (HPA) in binary systems prepared from H2PtCl6 or H2PtCl4 and H3PMo12O40 were studied using IR and UV-VIS spectroscopy, elemental analysis, XPS, EXAFS, TPR, and HREM. The calcination of platinum chloride with the HPA to 450°C resulted in the formation of a platinum salt of the HPA along with decomposition products (mixture I). The reduction of calcined samples containing Pt: HPA = 1: 1 with hydrogen at 300°C (mixture II) followed by exposure to air resulted in the regeneration of the HPA structure. The resulting solid samples of Pt 1?n 0 Pt n II ClmOxHy) (H3+p PMo 12?p VI Mo p V O40) (III) contained platinum and molybdenum in both oxidized and reduced states. The following association species were isolated from mixtures I and II by dissolving in water: [Pt n II PMo12O40] (I s) (n = 0.3?0.8) and [Pt n 0 PMo 12 red O40] (II s) (n ≈ 1). Under exposure to air, the solutions of I s were stable (pH ~2), whereas Ptmet was released from II s. After the drying of I s, the solid association species (Pt n II ClmOxHy). (H3PMo12O40), where n = 0.3?0.8, m = 0.2?1, and x = 3?0, (I solid) were obtained. The I solid/SiO2 supported samples were prepared by impregnating SiO2 with a solution of I s and drying at 100°C. Platinum metal particles of size ~20 Å and a mixed-valence association species of platinum with the HPA were observed after the reduction of I solid/SiO2 with hydrogen at 100–250°C. These samples were active in the gas-phase oxidation of benzene to phenol at 180°C with the use of an O2-H2-N2 mixture. 相似文献
4.
A. V. Ivanov O. V. Loseva T. A. Rodina A. V. Gerasimenko V. I. Sergienko 《Russian Journal of Inorganic Chemistry》2014,59(8):807-815
Reactions of freshly precipitated binuclear zinc dimethyldithiocarbamate with [AuCl4]? anions in 2 M HCl were studied. The heteropolynuclear complex [Au2{S2CN(CH3)2}4][ZnCl4] (I) and the polymeric heterovalent complex ([Au{S2CN(CH3)2}2][AuCl2]) n (II) were preparatively isolated from the chemisorption system [Zn2{S2CN(CH3)2}4]-Au3+/2 M HCl. The products were characterized by 13C MAS NMR data and by X-ray diffraction determination of crystal and molecular structures. The principal structural units of compounds I and II are the tetragonal planar complex cations [Au{S2CN(CH3)2}2]+ (in which the complex-forming ion coordinates two MDtc ligands in the S,S′-bidentate mode) and the anions, namely, the distorted tetrahedral anion [ZnCl4]2? in I and the linear [AuCl2]? anion in II. The further structural self-organization of complexes at the supramoleular level occurs through relatively weak secondary bonds Au?S and Au?Cl. The chemisorption capacities of zinc dimethyldithiocarbamate calculated from gold(III)-binding reactions are 644.1 and 1288.2 mg of gold per gram of the sorbent. Simultaneous thermal analysis studies of the thermal behavior of I and II were used to elucidate the conditions of gold recovery. 相似文献
5.
V. V. Sharutin V. S. Senchurin O. K. Sharutina A. P. Pakusina O. A. Fastovets 《Russian Journal of Inorganic Chemistry》2011,56(4):558-570
Complexes [(4-MeC6H4)4Sb] 2 + [Hg2I6]2? (I), [(4-MeC6H4)4Sb] 2 + [HgI4]2? (II), [(4-MeC6H4)4Sb] 3 + [Sb3I12]2? (III), were synthesized by reactions of tetra-p-tolylantimony iodide with mercury iodide and antimony iodide, respectively. Tetra-p-tolylantimony perrhenate [(4-MeC6H4)4Sb]+[ReO4]? (IV) was prepared from tetra-p-tolylantimony chloride and sodium perrhenate in acetone. Crystal structures of complexes I, II, and IV were determined by X-ray crystallography. Mercury and rhenium atoms have tetrahedral coordinations in these complexes. The Hg-I and Re-O distances in the structures of I, II, and IV vary within 2.7719(13)–2.7908(12)Å, 2.7028(3)–2.9163(3) Å, and 1.693(3)–1.744(3) Å, respectively. Antimony atoms in two crystallographically independent trinuclear centrosymmetric [Sb3I12]2? anions of complex III have an octahedral environment. Each terminal SbI3 fragment (Sb-It, 2.8265(9)–2.8333(10)Å) is bound to the central atom through tree bridging iodine atoms (Sb(2)-Ibr, 3.2275(9)–3.3620(10)Å). The distances between the central Sb atom and bridging iodine atoms are much shorter (Sb(1)-Ibr, 3.0153(6)–3.0316(6) Å; Sb(3)-Ibr, 2.9926(6)–3.0074(6) Å). 相似文献
6.
H. M. Zhang Q. Q. You L. Z. Wu L. Liu L. R. Yang 《Russian Journal of Coordination Chemistry》2014,40(5):304-313
The crystal structures of MOFs [Cu(PDA)(Phen)(H2O)]2 · 5H2O (I) and [Cu(PZCA)2(H2O)2] · 2H2O (II) (H2PDA = pyridine-2,6-dicarboxylic acid, Phen = 1,10-phenanthroline, HPZCA = pyrazine-2-carboxylic acid, H2PZDA = pyrazine-2,3-carboxylic acid) have been prepared under hydrothermal conditions. These MOFs have been characterized by element analysis, single-crystal X-ray diffraction, thermogravimetric analyses and IR spectroscopy. 3D frameworks of MOFs I and II are fabricated from zero-dimensional (0D) motifs through hydrogen bonds and π-π interactions. In MOF II, the PZCA ligand comes from in situ decarboxylation of the part of pyrazine-2,3-dicarboxylic acid (H2PZDA). Luminescent emissions bands of MOF I in methanol have been measured at room temperature and it displays selectivity to Zn2+, Cu2+, Pb2+, and Cd2+ ions. Cyclic voltammetry of MOFs I and II showed that the Cu(II/I) couple is irreversible. 相似文献
7.
T. E. Kokina E. A. Sankova R. F. Klevtsova L. A. Glinskaya S. V. Larionov 《Russian Journal of Coordination Chemistry》2008,34(11):811-818
The complex [Fe(Phen)3][iso-Bu2PS2)2 (I) was synthesized and the single crystals of [Fe(Phen)3](iso-Bu2PS2)2 · 5H2O (II) were grown. The disulfan {iso-Bu2P(S)S}2 (III) was isolated. Compound II consists of the complex cations [Fe(Phen)3]2+, the outer-sphere anions iso-Bu2PS 2 ? , and the molecules of water of crystallization. The coordination polyhedron of the Fe atom is a distorted N6 octahedron. Complex I is diamagnetic, and thus, the full spin of the Fe2+ ion S = 0. The structure of III is built of the molecules containing the S-S bridge 2.061(1) Å in length. 相似文献
8.
Z. A. Savel’eva S. N. Bizyaev L. A. Glinskaya R. F. Klevtsova A. V. Tkachev S. V. Larionov 《Russian Journal of Coordination Chemistry》2006,32(10):723-732
Reactions of Ni(NO3)2 · 6H2O) in EtOH(iso-PrOH) with optically active bis(menthane) ethylene-diaminodioxime (H2L1), pinano-para-menthane ethylenediaminodioxime (H2L2), pinano-para-menthane propylenediaminodioxime (H2L3) and bis(pinane) propylenediaminodioxime (H2L4) were used to synthesize [Ni(H2L1)NO3[NO3 · 2H2O (I), [Ni(HL2)]NO3 (II), [Ni(HL3)]NO3 (III), and [Ni(HL4)]NO3 (IV). X-ray diffraction study of paramagnetic complex I (μeff = 3.04 μB and diamagnetic complexes II and III revealed their ionic structures. A distorted octahedral polyhedron N4O2 in the cation of complex I is formed by the N atoms of tetradentate cycle-forming ligand, i.e., the H2L1 molecule, and the O atoms of the NO 3 ? anion acting as a bidentate cyclic ligand. In the cations of complexes II and III, containing a pinane fragment, the coordination core NiN4 has the shape of a distorted square formed on coordination of tetradentate cycle-forming ligands, i.e., anions of the starting dioximes. The structure of diamagnetic complex IV is likely to be similar to the structures of complexes II and III. 相似文献
9.
Two new ionic complexes built on polyoxometalate anions of [CoW12O40]6? and Ln3+ (Ln = Ce, Nd) cations, namely [Ce(CoW12O40)(NMP)2(H2O)6][Ce(NMP)(H2O)8] · 3H2O · NMP (I) and [Nd(CoW12O40)(NMP)2(H2O)6][Nd(NMP)(H2O)8] · 7H2O (II) (NMP = N-methyl-2-pyrrolidone) have been synthesized. Single crystal X-ray crystallographic analyses (CIF files CCDC nos. 704837 (I) and 689561 (II)) revealed that the structures of two complexes were similar, which crystallize in the P21/n monoclinic space group. Complexes I and II were both ionic clusters and the coordination numbers of Ln3+ (Ln = Ce, Nd) were nine. The unit cell parameters for I: a = 17.551(4), b = 17.783(4), c = 26.729(5) Å, β = 101.33(3)°, V = 8180(3) Å3, Z = 4. The unit cell parameters for II: a = 17.571(3), b = 17.750(3), c = 28.989(9) Å, β = 115.42(2)°, V = 8166(3) Å3, Z = 4. Complex I was characterized by TG analysis. Variable-temperature magnetic susceptibility measurements showed that there exists a weak antiferromagnetic interaction of complex II. 相似文献
10.
E. E. Martsinko L. Kh. Minacheva E. A. Chebanenko A. B. Ilyukhin I. I. Seifullina V. S. Sergienko 《Russian Journal of Coordination Chemistry》2013,39(9):629-635
Methods for the synthesis of ammonium citratogermanate (NH4)[Ge(OH)(H2Cit)2] · H2O (I) and potassium citratogermanate (K4[Ge(HCit)2(H2Cit)] · 3H2O (II), where H4Cit is citric acid) in aqueous MeCN were developed. The individuality, chemical composition, and thermal stability of complexes I and II were proved by elemental analysis, thermogravimetry, and IR spectroscopy. According to X-ray diffraction data, the coordination numbers of the Ge atoms are 5 and 6 and their coordination polyhedra are a square pyramid and an octahedron in complexes I and II, respectively. In both complexes, the Ge atom coordinates the deprotonated OH group and the α-carboxyl group of the ligands H n Cit4?n to form five-membered chelate rings. Hydrogen bonds in I as well as potassium cations in II serve to unite these complexes into frameworks. 相似文献
11.
C. L. Yuan 《Russian Journal of Coordination Chemistry》2012,38(8):583-588
Reactions of bis(acetylacetonato)oxovanadium(IV) with N??-[1-(2-hydroxynaphthyl)ethylidene]-4-nitrobenzohydrazide (H2HNB) and 2-hydroxy-N??-[1-(2-hydroxynaphthyl)ethylidene]benzohydrazide (H2HHB), respectively, product two oxovanadium(V) species with the formulas [VO(OMe)(HNB)]2 (I) and [VO(OMe)(HHB)] (II). The complexes I and II have been characterized by elemental analysis, IR spectra, and single crystal X-ray diffraction. The crystal of I is monoclinic: space group P21/n, a = 8.208(2), b = 14.528(3), c = 16.418(3) ?, ?? = 97.887(3)°, V = 1939.3(7) ?3, Z = 2. The crystal of II is triclinic: space group P $P\bar 1$ a = 8.334(2), b = 10.236(2), c = 11.337(2) ?, ?? = 80.91(3)°, ?? = 75.41(3)°, ?? = 75.63(3)°, V = 902.0(3) ?3, Z = 2. Complex I is a methoxide-bridged dimeric oxovanadium(V) complex, and complex II is a mononuclear oxovanadium(V) complex. The V atom in I is in an octahedral coordination, and that in II is in a square pyramidal coordination. 相似文献
12.
E. E. Netreba 《Russian Journal of Coordination Chemistry》2013,39(10):723-737
Binuclear complexes of Sm(III), Eu(III), Gd(III), Tb(III), and Dy(III) nitrates with 4,4,10,10-tetramethyl-1,3,7,9-tetraazospiro[5.5]undecane-2,8-dione (C11H20N4O2, SC)—[Sm(NO3)3(SC)(H2O)]2(I), [Eu(NO3)3(SC)(H2O)]2 (II), [Gd(NO3)2(SC)(H2O)3)]2(NO3)2 (III), [Tb(NO3)3(SC)(H2O)]2 (IV), [Dy(NO3)3(SC)(H2O)]2 (V), are synthesized, and their X-ray diffraction analyses are carried out. The crystals of complexes I–V are monoclinic: space group P21/n for III and P21/c for I, II, IV, and V. In centrosymmetric coordination complexes II, III, IV, and V, the Ln atoms are coordinated by two O(1) and O(2) atoms of two molecules of the SC ligands bound by a symmetry procedure (1 ? x, ?y, 1 ? z), three bidentate nitrate anions, and a water molecule. The coordination numbers of the metal atoms are equal to 9, and the coordination polyhedra are considerably distorted three-capped trigonal prisms, whose bases include the O(1), O(2), O(12) and O(3), O(7), O(9) atoms. The dihedral angle between the bases of the prism is 18°, and that between the mean planes of the side faces is 55°–71° for I, 17° and 55°–71° for II, 16° and 55°–70° for IV, and 16° and 55°–70° for V. The Sm...Sm distance in complex I is 9.44 Å, Eu...Eu in II is 9.42 Å, Tb...Tb in IV is 9.36Å, and Dy...Dy in V is 9.36Å. The gadolinium atom in complex III is coordinated by two oxygen atoms of two ligand molecules bound by a symmetry procedure (?x, ?y + 1, ?z + 1), two bidentate nitrate anions, and three water molecules. One of the nitro groups in compound III is localized in the external coordination sphere of the metal. The coordination number of gadolinium is 9, and the coordination polyhedron is a significantly distorted three-capped trigonal prism, whose base includes the O(1), O(2), O(7) and O(4), O(5), O(9) atoms. The dihedral angle between the bases of the prism is 22.8°, and that between the mean planes of the side faces is 53°–72°. The Gd...Gd distance in complex III is 9.17 Å. 相似文献
13.
Transition metal complexes of 2-(1-(carboxymethyl)-2-methyl-1H-benzimidazol-3-ium-3-yl)acetate (HL), namely [Co(L)2(H2O)4] · 6H2O (I) and [Cu(L)2(H2O)2] · 4H2O (II), have been synthesized by a hydrothermal procedure and characterized by X-ray crystallography, CIF files CCDC nos. 1007524 (I), 1007525 (II). Both I and II are mononuclear molecules. In I, the Co2+ ion is in octahedral coordiantion environment and surrounded by four O atoms from water molecules and two carboxylate O atoms of two deprotonated ligand (L?) occupied six culmination. While in II, the Cu2+ ion is located in a square-planar geometry, bounded to two aqua O atoms and two carboxylate O atoms from L?. 相似文献
14.
Volkov V. V. Drozdova M. K. Polyanskaya T. M. Ikorskii V. N. Aksenov V. K. Il'inchik E. A. 《Russian Journal of Coordination Chemistry》2002,28(6):407-413
In this paper, the results of a comparative study of a salt-like paramagnetic Mn(II) (d 5) complex [MnII(1,10-C12H8N2)3]2+[CoIII(B9C2H11)2]– 2 (I) against [MnII(1,10-C12H8N2)2(NCS)2]0 (II) and [MnII(1,10-C12H8N2)3]2+[B9C2H12]– 2 (III) are presented. Complexes I and III were synthesized by precipitating the Mn(II) cations with the corresponding anions in the stoichiometric ratio at a pH of ~ 4.5 and were studied by X-ray diffraction analysis on single crystals; by IR, Raman, and EPR spectroscopy; and using magnetochemical methods. The structures and crystal-chemical parameters of I at 190 and 293 K are identical. The crystals are mono-clinic; space group P21/n. Two crystallographic types of the [Co(B9C2H11)2]– anion in structure I have different conformational combinations (cisoid and transoid) of the –C2– groups in each pair of the B9C2H2– 11 cluster ligands. The short contacts C–Hδ+···δ–H–B between different-type hydrogen atoms show themselves in the IR spectra. The apparent magnetic moments of the Mn(II) atom in I, II, and III at 293 K correspond to μ = 5.86 μB and do not depend on its ligand or anion environment. The temperature dependences μ = f(T) pass through a maximum at about 20 K, which suggests the occurrence of ferromagnetic exchange interactions in complexes I and III, which both contain cluster carborane derivatives with three-dimensional aromaticity. 相似文献
15.
Two new coordination polymers, [Pb(IDPT)2(NO3)2] (I) and [Mn(IDPT)(SO4)(H2O)2] (II) (IDPT = imidazo[4,5-f][1,10]phenanthroline), were synthesized by hydrothermal method and characterized by elemental analysis and single-crystal X-ray diffraction technique. The results reveal that the complex I belongs to monoclinic crystal system, space group C2/c and complex II belongs to monoclinic crystal system, P21/c space group. The cell parameters are: a = 19.1970(13), b = 7.3875(5), c = 17.3825(12) Å, β = 100.47(10)°, V = 2424.0(3) Å3, Z = 4, F(000) = 1488 for I; a = 10.9135(6), b = 7.0230(4), c = 19.7034(10) Å, β = 99.32(10)°, V = 1490.25(14) Å3, Z = 4, F(000) = 828 for II. In the structure of complex I, the metal center Pb(II) is six-coordinated, displays an octahedral geometry. Each molecule is further connected with neighboring one via π-π interactions into 1D chain. In complex II, Mn(II) is six-coordinated to form a distorted octahedral geometry. Compound II displays 1D supramolecular chain formed through hydrogen bonds. Additionally, the fluorescent properties for the complexes were investigated. Complexes I and II exhibit strong photoluminescence with emission maximum at 583 and 529 nm at room temperature. 相似文献
16.
A. N. Chekhlov 《Russian Journal of Inorganic Chemistry》2008,53(11):1763-1770
Two complexes are synthesized: diaquabromo(18-crown-6)rubidium [RbBr(18-crown-6)(H2O)2] (I) and triaqua(18-crown-6)barium dibromide monohydrate [Ba(18-crown-6)(H2O)3]2+ 2Br? · H2O (II). The orthorhombic structure of compound I (space group Pnma, a = 10.124 Å, b = 15.205 Å, c = 12.544 Å, Z = 4) and the monoclinic structure of compound II (space group C 2/c, a = 17.910 Å, b = 10.315 Å, c = 14.879 Å, β = 123.23°, Z = 4) are determined by a direct method and refined by the full-matrix least-squares method in the anisotropic approximation to R = 0.063 (I) and 0.042 (II) for all 2293 (I) and 3363 (II) independent measured reflections (CAD-4 automated diffractometer, λMoK α). The complex molecule [RbBr(18-crown-6)(H2O)2] in compound I and the randomly disordered cation [Ba(18-crown-6)(H2O)3]2+ in compound II are of the host-guest type: their Rb+ or Ba2+ cation (its coordination number is nine) is located in the cavity of the 18-crown-6 ligand and coordinated by all six O atoms. In structure I, the coordination polyhedron of Rb+ is a distorted hexagonal pyramid with a triple apex at the Br? ligand and two O atoms of the water molecules. In structure II, the Ba2+ polyhedron is a distorted hexagonal bipyramid with one apex at the O atom of the water molecule and the other split apex at two O atoms of water molecules. 相似文献
17.
V. I. Sokol V. V. Davydov N. Yu. Merkur’eva V. S. Sergienko S. A. Pervushina Yu. V. Shklyaev 《Russian Journal of Coordination Chemistry》2006,32(6):402-415
Complexes of Cu(II) and Co(II) nitrates with 3-phenyl-5,5-dimethyl-5,6-dihydro-1,2,4-triazolo[3,4-a]isoquinoline (L0) of the composition [CuL 2 0 (NO3)2] (I) and [CoL 2 0 (NO3)2] · CH3CN (II) are synthesized and their crystal structures are determined by X-ray diffraction. The L0 ligand is coordinated to the metal atoms through the N atom in position 2 of triazole fragment. The coordination polyhedron of the Cu(II) atom is a square with two additional axial vertices, while that of the Co(II) atom is a tetrahedron with two additional vertices. The NO 3 ? groups in the structures of I and II perform similar anisobidentate function. Complexes I and II are studied by IR and electronic spectroscopy. 相似文献
18.
E. Ya. Misochko V. A. Benderskii A. U. Goldshleger A. V. Akimov A. V. Benderskii C. A. Wight 《Russian Chemical Bulletin》1997,46(4):678-686
The products of UV photolysis of ternary Ar?CH4(CD4)?F2 mixtures (1:c:c 0,c, c 0=0.001–0.01) at 13–16 K were identified by ESR and FTIR spectroscopy. These products are?CH3 (?CD3) radicals of typesI andII and molecular CH3F?HF complexes. The latter were characterized by the IR bands of the stretching C?F (1003 cm?1) and H?F (3774 cm?1) vibrations. The ESR spectra of radicalsI are asymmetric. The anisotropy of theg-factor (Δg~10?3) of radicalI indicates that the structure of the radicals is nonplanar. The ESR spectrum of the typeII radical is identical to that of matrix-isolated?CH3 (?CD3) radicals with the planar structure (Δg<5·10?5). Under the experimental conditions, the amount of complexes formed in the photolysis is equal to 0.022·c. When the photolysis is ceased, radicalI disappears after ≈103 s and radicalII is stabilized. The limiting concentrations of the stabilized?CH3 and?CD3 radicals are equal to 2·10?2·c and 2·10?3·c, respectively. A mechanism of the formation of the products is suggested. It is based on the assumption that both matrix-isolated CH4 and F2 and their heterodimers CH4?F2 are present in the samples and it takes into account the long-range migration of translationally excited flourine atoms. The CH3F?HF complexes and radicalsI are generated by the photolysis of the CH4?F2 heterodimers. The decay of radicalsI is caused by geminate recombination of proximate F...CH3 pairs. RadicalsII are formed in the reaction of translationally excited fluorine atoms with isolated CH4 (CD4) molecules. 相似文献
19.
E. E. Martsinko L. Kh. Minacheva I. I. Seifullina E. A. Chebanenko V. S. Sergienko A. V. Churakov 《Russian Journal of Inorganic Chemistry》2013,58(2):152-159
A synthetic procedure was developed, and heteropolynuclear coordination compounds—the products of the interaction of germanium tetrachloride with xylaric (trihydroxyglutaric) acid HOOC-CH(OH)-CH(OH)-CH(OH)-COOH (H5L) and the acetates of the 3d metals Mn(II) and Co(II)—were prepared. The compounds were characterized by elemental analysis, thermogravimetry, and IR spectroscopy. The X-ray diffraction analysis of the [M(H2O)6][Ge(μ3-L)2{M(H2O)2}2] · 4H2O · nCH3CN complexes, where M = Co, n = 0 (I) and M = Mn, n = 1 (II), was performed. The crystals of I are monoclinic, a = 10.752(2) Å, b = 11.830(2) Å, and c = 10.772(2) Å, β = 94.741(3)°, V = 1365.4(5) Å3, Z = 2, space group P21/n, R1 = 0.0309 for 3200 reflections with I > 2σ(I). The crystals of II are triclinic, a = 9.5330(17) Å, b = 9.7415(17) Å, and c = 10.3935(18) Å, α = 115.024(2)°, β = 97.580(3)°, γ = 111.535(3)°, V = 764.9(2)Å3, Z = 1, space group $P\bar 1$ , R1 = 0.0621 for 3028 reflections with I > 2σ(I). The bimetallic anions [Ge(μ3-L)2{M(H2O)2}2]2?, the cations [M(H2O)6]2+, and crystal water molecules form the basis of compounds I and II (the acetonitrile molecule is also a constituent of compound II). In the centrally symmetrical trinuclear complex anion, the Ge(1) atom is bound to two M(1) atoms through two completely deprotonated bridging ligands. The Ge(1) atom is coordinated to the six alcohol oxygen atoms of two ligands L5? at the apexes of a distorted octahedron (the average Ge(1)-O distances in I and II are 1.8858(14) and 1.892(3)Å, respectively). The coordination polyhedron of the M(1) atom in the complex anion is a strongly distorted octahedron. The base of the coordination polyhedron is formed by the two bridging alcohol oxygen atoms (the average M(1)-O distances in I and II are 2.1756(14) and 2.255(3) Å, respectively) of two L5? ligands and by the oxygen atoms of two water molecules (the average M(1)-O distances in I and II are 2.0693(17) and 2.175(4) Å, respectively). In the centrally symmetrical complex cation, the coordination polyhedron of the M(2) atom is a somewhat distorted octahedron. The M(2)-O(H2O) bond lengths in I and II vary in the ranges of 2.0137(17)-2.1555(17) and 2.140(5)-2.172(4) Å, respectively (the average lengths are 2.0375(17) and 2.166(4) Å, respectively). The cations and anions are joined by a branched system of hydrogen bonds. 相似文献
20.
A. N. Chekhlov 《Russian Journal of Coordination Chemistry》2007,33(7):482-487
Two complexes, (2.2.2-cryptand)rubidium chloride and bromide hydrates [Rb(Crypt-222]Hal · 3.5H2O (Hal = Cl (I) and Br (II)), are synthesized. The structures of isomorphic crystals of compounds I and II are studied by X-ray diffraction analysis. The crystals are trigonal: space group P \(\overline 3 \), Z = 2; I: a = 11.810 Å, c = 11.302 Å; II: a = 11.890 Å, c = 11.402 Å. The structures are solved by a direct method and refined by the full-matrix least-squares method in the anisotropic approximation to R = 0.060 (I) and 0.077 (II) for 2650 (I) and 2700 (II) independent reflections (CAD-4 automated diffractometer, λMoK α radiation). In crystals of complexes I and II, the [Rb(Crypt-222)]+ cation of the host-guest type lies on the crystallographic axis 3 and has the approximate symmetry D 3. In complexes I and II, the coordination polyhedron of the Rb+ cation is a two-base-centered trigonal prism somewhat distorted to an antiprism. The crystals of compounds I and II contain H-bonded disordered cubes of the water molecules and Cl? or Br? anions. 相似文献