首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 15 毫秒
1.
Bis(4-bromophenoxy)tris(para-tolyl)antimony (I), bis(4-nitrophenoxy)tris(para-tolyl)antimony (II), bis(4-nitrophenoxy)tris(4-fluorophenyl)antimony (III), bis(2,3,4,5,6-pentafluorophenoxy)tris(4-fluorophenyl) antimony (IV), and bis(2,3,4,5,6-pentachlorophenoxy)tris(4-fluorophenyl)antimony (V) (CIF files CCDC 1470829 (I), 1474589 (II), 1062337 (III), 1470476 (IV), and 1472954 (V)) are synthesized in high yields by the reactions of tris(para-tolyl)- and tris(4-fluorophenyl)antimony with 4-bromo-, 4-nitro-, 2,3,4,5,6-pentafluoro-, and 2,3,4,5,6-pentachlorophenol, respectively, in diethyl ether in the presence of tert-butyl hydroperoxide. The Sb atoms in compounds I–V have a distorted trigonal bipyramidal coordination with the aroxy groups in the axial positions (angles OSbO 174.08(11)°–179.4(5)°). The average Sb–C bond lengths in compounds I–V are similar and independent of the nature of the para-substituent in the aryl rings. The Sb–O distances are close to the sum of covalent radii of Sb and O atoms. Hydrogen bonds H···F are involved in the formation of the crystal structures of compounds III–V.  相似文献   

2.
µ2-Oxobis[(2,4,6-tribromophenoxo)tris(para-tolyl)antimony] (I), µ2-oxobis[(2,3,4,5,6-pentachlorophenoxo) tris(para-tolyl)antimony] (II), and µ2-oxobis(2,4-dinitrophenoxo)tris(para-tolyl)antimony] (III) have been synthesized with high yields by the reaction of tris(para-tolyl)antimony with 2,4,6-tribromo-, 2,3,4,5,6-pentachloro-, and 2,4-dinitrophenol, respectively, in ether in the presence of tert-butylhydroperoxide. The Sb atoms in complexes I, II, and III have a distorted trigonal bipyramidal coordination with the aroxyl ligands and the bridging oxygen atom in axial positions. The central Sb–O–Sb moiety in molecules of complexes I–III has an angular structure.  相似文献   

3.
The syntheses of the 2,6-di-tert-butyl-4-(2-hydroxybenzylideneamino)phenolate (L) complexes of Gd (I), Nd (II), Er (III), Yb (IV), Tm (V), Sm (VI), and Tb (VII) are described. The structures of the Gd and Er complexes are determined by X-ray diffraction analysis (CIF files CCDC nos. 1558820 (I) and 1558819 (III)). All synthesized compounds exhibit ligand-centered photoluminescence in a range of 405–485 nm. In addition, the luminescence spectra of solid samples of the neodymium and ytterbium complexes contain narrow bands of ff transitions characteristic of Nd3+ and Yb3+ ions.  相似文献   

4.
Tris(4-N,N-dimethylaminophenyl)antimony dicarboxylates (4-Me2NC6H4)3Sb[OC(O)R]2 (R = C6H4Me-2 (I), C6H4Me-4 (II), CH=CHPh (III)), (4-Me2NC6H4)3Sb[OC(O)C(O)O] (IV), and (4-Me2NC6H4)3Sb[OC(O)C6Cl4C(O)O] (V)) and tris(4-N,N-dimethylaminophenyl)antimony diaroxides (4-Me2NC6H4)3Sb(OAr)2 (Ar = Ph (VI), C6H2Br3-2,4,6 (VII), and C6H3Me2-2,6 (VIII)) have been synthesized by the reaction of tris(4-N,N-dimethylaminophenyl)antimony in ether with carboxylic acids or phenols in the presence of hydrogen peroxide. According to X-ray diffraction analysis data, the Sb atoms in compounds I and VII have a distorted trigonal-bipyramidal coordination, and the axial OSbO angles are 175.4(1)° and 177.9(3)°, respectively. The Sb-O bond lengths are 2.133(3) and 2.142(2) Å in compound I and 2.089(5) Å in compound VII.  相似文献   

5.
The tris(4-N,N-dimethylaminophenyl)antimony bis(4-methyl benzoate) (I) was synthesized by the reaction of tris(4-N,N-dimethylaminophenyl)antimony with 4-methylbenzoic acid in ether in the presence of hydrogen peroxide. According to the X-ray diffraction data, in this molecule the antimony atom is in distorted trigonal-bipyramidal coordination (the axial angle OSbO is 176.15(4)°). The CSbC angles in the equatorial plane are 105.27(6)°, 108.01(6)°, 146.71(6)° (the sum is 359.99°). The Sb-O and Sb-C bond lengths are 2.131(1), 2.137(1) Å and 2.099(2), 2.100(1), 2.107(1) Å, respectively. The intramolecular contacts Sb...O=C are 2.826(1) and 2.928(1) Å.  相似文献   

6.
In the course of systematic studies, heteronuclear germanium lanthanide complexes based on 1,3-diamino-2-propanoltetraacetic acid (H5Hpdta) have been synthesized (Ln = Pr (I), Nd (II, the structure was described in [1]), Sm (III), Eu (IV), Gd (V), Tb (VI), Dy (VII), Ho (VIII), Er (IX), Tm (X), Yb (XI), Lu (XII)). Comparative analysis of their structure as a function of the lanthanide ion has been performed. The analysis is based on a combination of physicochemical data on complexes I–XII, including X-ray crystallographic data for two heteronuclear [Ge(OH)(μ-Hpdta)(μ-OH)Ln(H2O)3] · 2H2O complexes (Ln = Tb (VI) and Yb (XI). Isostructural crystals of VI and XI are monoclinic, Z = 4, space group P21/n, a = 9.340(4) and 9.3133(10) Å, b = 10.4839(14) and 10.4561(10) Å, c = 20.246(2) and 20.1222(10) Å, β = 95.12(3)° and 95.275(10)°, V = 1974.5(10) and 1951.2(3) A3, R1 = 0.0277 and 0.0241 for 4527 and 4751 reflections with I > 2σ(I). Crystals of VI and XI are composed of binuclear [Ge(OH)(μ-Hpdta)(μ-OH)Ln(H2O)3] molecules and crystal water molecules. The Ge and Ln atoms in VI and XI are linked by the bridging oxygen atom of the hydroxo group (Ge-O, 1.806(2) and 1.812(2) Å; Ln-O, 2.445(3) and 2.405(2) Å, respectively) and by the deprotonated oxygen atom of the isopropanol group of the Hpdta5-ligand (Ge-O, 1.865(2) and 1.864(2) Å; Ln-O, 2.302(2) and 2.255(2) Å in VI and XI, respectively). The coordination sphere of each of the Ge and Ln atoms involves one nitrogen atom (Ge-N, 2.097(3) and 2.096(3) Å; Ln-N, 2.670(3) and 2.628(3) Å in VI and XI, respectively) and two carboxyl oxygen atoms of four acetate arms of the completely deprotonated heptadentate Hpdta5? ligand (av. Ge-O, 1.922(3) and 1.920(3) Å; Ln-O, 2.349(2) and 2.298(2) Å in VI and XI, respectively). The coordination polyhedron of the Ge atom is completed to a distorted octahedron by the oxygen atom of the terminal hydroxo group (Ge-O, 1.811(2) Å in VI and 1.810(2) Å in XI), and the coordination polyhedron of the Ln atom is completed to an eight-vertex polyhedron by the oxygen atoms of three water molecules (av. Ln-O, 2.378(3) Å in VI and 2.342(3) Å in XI). In the crystals of VI and XI, complex molecules and crystal water molecules are combined by a system of hydrogen bonds into a three-dimensional framework.  相似文献   

7.
A series of the new tin(IV) complexes based on the 2-hydroxy-4-N-(phenyl)-3,6-di-tert-butyl-p-iminobenzoquinone ligand (LH) containing various hydrocarbon substituents R at the metal atom (R = Me, Et, n Bu, t Bu, and Ph) is synthesized. The structures of the synthesized compounds were determined by elemental analysis, IR spectroscopy, and 1H and 119Sn NMR spectroscopy. The X-ray diffraction analyses are carried out for the LSnPh3 (I) and L2SnEt2 (IV) complexes (CIF files CCDC no. 1557840 (I) and 1557839 (IV)). The main electrochemical characteristics in a solution are obtained for the whole series by cyclic voltammetry.  相似文献   

8.
2,3,4,5,6-Pentafluorophenoxytetraphenylantimony (I), 2,3,4,5,6-pentachlorophenoxytetraphenylantimony (II), 2,3,4,5,6-pentafluorophenoxytetra-p-tolylantimony (III), and 2,3,4,5,6-pentachlorophenoxytetra-p-tolylantimony (IV) were synthesized by the reaction of pentaarylantimony (Ar = Ph, p-Tol) with pentafluoro- and pentachlorophenol in toluene. Compounds I–IV were also synthesized with yields of up to 95% from pentaarylantimony and triarylantimony diaroxides. Triarylantimony diaroxides Ph3Sb(OC6F5)2 (V), Ph3Sb(OC6Cl5)2 (VI), p-Tol3Sb(OC6F5)2 (VII), p-Tol3Sb(OC6Cl5)2 (VIII) were synthesized from triarylantimony, tert-butylhydroperoxide, and phenol in ether. The Sb atoms in compounds I–VIII had a distorted trigonal bipyramidal coordination with electronegative ligands in axial positions.  相似文献   

9.
Tris(5-bromo-2-methoxyphenyl)antimony bis(4-nitrophenylacetate) (I), tris(5-bromo-2-methoxyphenyl)antimony bis(2-methoxybenzoate) (II), and tris(5-bromo-2-methoxyphenyl)antimony bis(phenylpropiolate) (III) have been synthesized via the reaction between tris(5-bromo-2-methoxyphenyl) antimony and 4-nitrophenylacetic acid, 2-methoxybenzoic acid, and phenylpropiolic acid, respectively, in the presence of hydrogen peroxide (molar ratio: 1: 2: 1). According to X-ray diffraction data, the antimony atom in molecules of complexes IIII has a distorted trigonal bipyramidal coordination. The OSbO axial angles and the CSbC bond angles in the equatorial plane are 173.27(15)°, 172.96(11)°, 172.99(10)°, and 115.5(2)°–123.3(2)°, 108.81(16)°–129.32(17)°, and 110.66(17)°–127.91(17)°, respectively. The Sb-O bond lengths are 2.092(4) and 2.115(4)Å in I, 2.088(3) and 2.097(2) Å in II, and 2.096(3) and 2.120(3) Å in III. The Sb-C bonds range within 2.095(6)–2.123(6) Å in I, 2.107(4)–2.117(4) Å in II, and 2.097(4)–2.116(4) Å in III. Complexes I, II, and III are observed to have intramolecular Sb…OCH3 contacts (3.169–3.226, 3.134–3.174, and 3.147–3.196 Å, respectively) in addition to Sb…O=C interactions (3.121, 3.139Å; 2.944, 3.038 A0; 3.111, 3.120 Å).  相似文献   

10.
The experimental and theoretical electron densities in complexes [6-(2,6-di-iso-propylphenyl)imino-2,4-di-tert-butylcyclohexa-2,4-diene-1-peroxo-1-olato-N,O,O′]tris(p-chlorophenyl)antimony(V), (p-Cl–C6H4)3Sb(2,6-iso-Pr–Ph–AP) · O2 (I), and [6-(2,6-dimethylphenyl)imino-2,4-di-tert-butylcyclohexa-2,4-diene-1-peroxo-1-olato-N,O,O′]tris(p-chlorophenyl)antimony(V), (p-Cl–C6H4)3Sb(2,6-Me–Ph–AP) · O2 (II), where AP is 4,6-di-tert-butyl-N-o-iminobenzoquinone dianion, are studied on the basis of high-resolution X-ray diffraction data and theoretical calculations using the density functional theory (B3LYP/DGDZVP). The nature of chemical bonds and the charge distribution on atoms are studied, and the energy of molecular oxygen addition to the Sb(V) o-aminophenolate complexes is estimated. The structures are deposited with the Cambridge Crystallographic Data Centre (CIF files CCDC nos. 1560600 (spherical refinement) and 1560601 (multipole refinement) for complex I; 1560602 (spherical) and 1560603 (multipole) for complex II).  相似文献   

11.
The synthesis, vibrational spectra, and X-ray diffraction analysis results for 2-(diphenylphosphinylmethoxy) aniline, 2-[(C6H5)2P(O)OCH2]C6H4NH2(I), are described. The crystals are monoclinic: a = 18.4515(17) Å, b = 10.5421(12) Å, c = 17.897(2) Å, β = 104.479(8)°, V = 3370.7(6) Å3, Z = 8, space group P21/c, R = 0.0546 for 1770 reflections with I > 2σ(I). The unit cell contains two crystallographically independent molecules Ia and Ib joined by an N-H …O hydrogen bond between a hydrogen atom of the amino group of aniline in molecule Ia (Ib) and the phosphoryl oxygen atom of molecule Ib (Ia) (O…H 2.18 and 2.19 Å, N…O, 2.979(5) and 3.000(5) Å; NHO angle, 154° and 157°).  相似文献   

12.
Tris(5-bromo-2-methoxyphenyl)antimony bis(monohaloacetates) [(5-Br)(2-MeO)C6H3]3Sb[OC(O)CH2X]2, X = Cl (I), Br (II), I (III) have been synthesized by the reaction of tris(5-bromo-2-methoxyphenyl)antimony with chloro-, bromo-, and iodoacetic acids in the presence of hydrogen peroxide. According to X-ray analysis the antimony atom in I–III has a distorted trigonal-bipyramidal coordination.  相似文献   

13.
Crystals of double polyphosphates EuCs5(PO3)8 (I) and GdCs5(PO3)8 (II) have been studied by X-ray diffraction. The isostructural crystals of I and II are monoclinic, space group C2. Only unit cell parameters have been determined for the crystals of double Pr and Cs polyphosphate (III). This crystal is isostructural with earlier studied La3Cs15P24O72 · 6H2O (IV). The crystals of compounds III and IV are triclinic, space group P1, Z = 1; a = 11.987(2) and 12.178(5) Å, b = 14.754(8) and 14.740(8) Å, c = 14.692(8) and 14.847(9) Å, α = 60.15(4)° and 60.87(5)°, β = 67.04(4)° and 66.35(4)°, γ = 78.76(3)° and 77.54(4)°, respectively. In compounds I and II, the polyphosphate anions exist as infinite chains. The MIIIO8 polyhedra are isolated from each other but share edges and faces with the CsO n polyhedra.  相似文献   

14.
A planar rectangular cluster Ni18 (I) was obtained from N-(2-pyridylmethyl)iminodipropionic acid (II). The crystal structure of complex I was determined by X-ray diffraction. Complex I is built from the octanuclear planar framework (III) of the nickel(II) hydroxo complex (Ni...Ni 2.976–3.092 Å), four nickel chelates with the corresponding acid (IV), which are coplanar with the framework and are on both its sides (Ni...Ni, 2.938–3.188 Å), four hydroxo complexes, and two mixed chloro chelates V), which are not coplanar with the framework (Ni...Ni, 3.141 and 3.181 Å). In the chelate parts of complex I, the organic ligand is hexadentate because of bridging bonds; the coordination polyhedroLn of the metal center is a distorted square bipyramid (4 + 2).  相似文献   

15.
Two ethylenediamine derivatives—N-(2-ammoniumethyl)carbamate HN(COO?)CH2CH2N+H3 (I) and tetraacetylethylenediamine (H3CC(O))2NCH2CH2N(C(O)CH3)2 (II) (synthesized for the first time)—have been synthesized and characterized by X-ray crystallography. Compounds I and II are isolated as minor admixtures upon an attempt to synthesize ethylenediamine complexes of lanthanum and neodymium nitrates, respectively. The crystals of I and II are monoclinic: a = 7.778 Å, b = 8.060 Å, c = 7.568 Å, β = 95.73°, Z = 4, space group P21/c (I); a = 5.946, b = 10.255, c = 9.343 Å, β = 95.72°, Z = 2, space group P21/c (II). The bond lengths and bond angles lie within the corresponding standard values. Compounds I and II have different conformations of the N-C-C-N ethylenediamine moiety: gauche in I and trans in II, and the corresponding torsion angles are equal to 66.6° and 180°, respectively.  相似文献   

16.
Seven new cobalt(II) complexes based on the Schiff bases, 2,6-diacetylpyridine bis(isonicotinoylhydrazone) (H2L1) and 2,6-diacetylpyridine bis(nicotinoylhydrazone) (H2L2), are synthesized and studied by X-ray diffraction analysis: [Co(H2L1)(NCS)2] · 2.25H2O (I), [Co(H2L2)(NCS)2] · CH3OH (II), [Co(H2L2)(NCS)(H2O)]NCS (III), [Co(H4L1)(NCS)2](NO3)2 · 2H2O (IV), [Co(H4L1)(NCS)2][Co(NCS)4] · 0.75H2O (V), [Co(H4L2)(NCS)2][Co(NCS)4] · 1.75H2O (VI), and [Co(H2L2)(NCS)(CH3OH)]2[Co(NCS)4] · 2CH3OH (VII) (CIF files CCDC 941186 (I), 1457906 (Ia), 1457905 (II), 941187 (III), 1457907 (IV), 1457908 (V), 1457909 (VI), and 941188 (VII)). The organic ligands in the complexes act as pentadentate neutral H2L or doubly protonated (H4L)2+ coordinated through the same set of donor atoms N3O2. In all compounds IVII, the coordination polyhedron of the Co2+ ion in a complex with the Schiff bases has a shape of a pentagonal bipyramid. The hydrazones are arranged in the equatorial plane of the bipyramid. Its axial vertices are occupied by the nitrogen atoms of the NCS ̄ anions in compounds I, II, and IV–VI and by the nitrogen atoms of NCS ̄ and oxygen of the water molecule in compound III or methanol in compound VII. The NO 3 - anions or [Co(NCS)4]2 ̄ complex anions obtained by the reactions are involved along with the NCS ̄ anions in the formation of compounds IV–VII.  相似文献   

17.
The structural features of 39 mononuclear octahedral d 2-rhenium(V) monooxo complexes (I–ХХХIХ) with oxygen atoms of bidentate-chelating (O,O) acido ligands (Lig) are considered. In 21 complexes (I–ХХI), the O(lig) atoms are both in trans and cis positions to oxo ligands. In the other 18 complexes (XXI–XXXIX), both O(lig) atoms are in cis positions to the O(oxo) ligands.  相似文献   

18.
Coordination compounds of iron(II) thiocyanate with tris(3,5-dimethylpyrazol-1-yl)methane (HC(3,5-Me2Pz)3), [Fe(HC(3,5-Me2Pz)3)2](NCS)2] (I) and [Fe(HC(3,5-Me2Pz)3)(Рhz)(NCS)2] · H2O (II), where Рhz is phthalazine, are synthesized. The complexes are studied by X-ray diffraction analysis, diffuse reflectance and IR spectroscopy, and static magnetic susceptibility measurements. The single crystals are obtained, and the molecular and crystal structures of complex II and compounds [Fe(HC(3,5-Me2Pz)3)(3,5-Me2Pz)(NCS)2] · С2H5OH (III), where 3,5-Me2Pz is 3,5-dimethylpyrazole, and [Fe(HC(3,5-Me2Pz)3)2][Fe(HC(3,5-Me2Pz)3)(NCS)3]2 (IV) are determined (CIF files CCDC 1415452 (II), 1415453 (III), and 1415454 (IV)). The study of the temperature dependence μeff(Т) in a range of 2–300 K shows exchange interactions of the antiferromagnetic character between the iron(II) ions in complexes I and II.  相似文献   

19.
Tris(5-bromo-2-methoxyphenyl)antimony (I) (yield, 85%) and tris(5-bromo-2-methoxyphenyl)bismuth (II) (yield, 81%) were obtained by reacting 5-bromo-2-methoxyphenyllithium with antimony(III) chloride and bismuth(III) chloride, respectively. According to X-ray diffraction data, the antimony atom in I is highly coordinated. The Sb-C bonds lengths are 2.160(1) Å, 2.163(1) Å, and 2.157(2) Å; the Sb…O distances are 2.985(1) Å, 3.051(1) Å, and 3.052(1) Å. The CSbC bond angles vary in the range of 92.19(6)°-94.52(6)°. Molecules of I are linked via Sb(A)…Br(B) intermolecular contacts (3.742(2) Å) to form polymer chains.  相似文献   

20.
The reaction of different macrocyclic metallic tectons and dicarboxylic acid ligand yielded six new coordination polymers, namely, {[(NiL1)(4,4'-Bpdc)] ? DMF ? 2.5H2O} n (I), {[(NiL2)(4,4'-Bpdc)] ? DMF ? 2.5H2O} n (II), [(NiL3)2(4,4'-Bpdc)1.5][(NiL3)(4,4'-Bpdc)] ? ClO4 ? 28H2O (III), {[(NiL4)(4,4'-Bpdc)] ? 4H2O} n (IV), {[(NiL5)(4,4'-Tpdc)] ? 5H2O} n (V), {[(NiL3)(4,4'-Tpdc)]} n (VI) (L1 = 1,4,7,9,12,14-hexaaza-tricyclo[12.2.1.14.7]octadecane, L2 = 1,3,10,12,15,18-hexaazatetracyclo[16.2.1.112.15.04.9]docosane, L3 = 11-methyl-1,4,8,10,13,15-hexaaza-tricyclo[13.3.1.14.8]icosane, L4 = 1,3,10,12,16,19-hexaazate-tracyclo[17.3.1.1.12.16,04.9]tetracosane, L5 = 1,4,8,10,13,15-hexaaza-tricyclo[13.3.1.14.8]icosane, 4,4'-Bpdc = 4,4'-biphenyldicarboxylic acid and 4,4'-Tpdc = 4,4'-terphenyldicarboxylic acid) (CIF files CCDC nos. 1055545–1055550 for I–VI, respectively). Except for the different conformations of the macrocyclic metallic tectons or dicarboxylic acid ligands, complexes I–VI crystallized under the same environment, however, they exhibit diverse packing mode of infinite 1D coordination polymers, showing macrocyle or dicarboxylic acid ligand regulated self-assemble. The solid states UV-Vis for complexes I–VI also have been investigated.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号