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1.
A. Yu. Bykov A. P. Zhdanov K. Yu. Zhizhin N. T. Kuznetsov 《Russian Journal of Inorganic Chemistry》2016,61(13):1629-1648
Data on the structure, properties, and reactivity of one of the least studied 3D aromatic clusters—nonahydro-closo-nonaborate anion [B9H9]2–—have been systematized. It has been shown that the key aspects of its reactivity are related to structural flexibility, which essentially distinguishes the [B9H9]2– anion from the higher representatives of closo-borate anions. 相似文献
2.
A. S. Kubasov E. Yu. Matveev E. S. Turyshev I. N. Polyakova K. Yu. Zhizhin N. T. Kuznetsov 《Doklady Chemistry》2017,477(1):257-260
The interaction of the [B10H10]2– and [B12H12]2– anions with aliphatic and aromatic nitro compounds (RNO2, where R = Et, n-Pr, i-Pr, tert-Bu, Ph) has been studied under irradiation with visible and UV light. It has been shown that, depending on the reaction conditions, both mono- and disubstituted nitro-closo-decaborates can be selectively obtained in yields up to 50%. 相似文献
3.
D. S. Bolotin M. Ya. Demakova E. A. Daines M. S. Avdontseva A. P. Zhdanov K. Yu. Zhizhin N. T. Kuznetsov 《Russian Journal of General Chemistry》2017,87(1):37-43
A series of closo-decaborate anions containing an O-iminoacylamide oxime fragment were synthesized by nucleophilic addition of aromatic amide oximes to 2-propionitrilium closo-decaborate anion. The isolated compounds were characterized by IR, 1H, 13C–{1H}, and 11B–{1H} NMR, and mass spectra. The structure of (Ph4P)[2-B10H9NH=C(Et)ON=C(NH2)C6H4Me-2] was determined by single-crystal X-ray analysis. 相似文献
4.
M. Yu. Stogniy I. B. Sivaev P. V. Petrovskii V. I. Bregadze 《Russian Journal of General Chemistry》2012,82(1):91-94
Iodination and bromination of 10-alkoxyderivatives of 7,8-dicarba-nido-undecaborate anion [10-RO-7,8-C2B9H11]− has been studied. The corresponding monoiodo, diiodo and dibromo derivatives were prepared. 相似文献
5.
E. A. Il’inchik R. V. Gulyaev D. A. Svintsitskii K. G. Myakishev V. V. Volkov 《Russian Journal of General Chemistry》2010,80(8):1550-1556
Compounds [Et4N]2B3H8 and CsB3H8 are studied using the ESCA method. The results of analysis of the B1s electron spectra and estimation of the effective charge differences in [Et4N]2B3H8 are compared to the data of theoretical calculations of the B3H8− anion. 相似文献
6.
A. Yu. Bykov G. A. Razgonyaeva N. N. Mal’tseva K. Yu. Zhizhin N. T. Kuznetsov 《Russian Journal of Inorganic Chemistry》2012,57(4):471-473
A new method of synthesis of the B3H8− anion has been suggested. The method uses the reaction of some metal halides (CuCl, SnCl2, CrCl3, PbF2, PbCl2, PbBr2, and BiCl3) with sodium tetrahydroborate. It is characterized by high (up to quantitative) yields and simplicity of isolation of the
target products ((n-C4H9)4N)[B3H8] and Cs[B3H8]. 相似文献
7.
Feng Liu Wie-Ping Zhang Shui-Yang He Liu-Jie Wang 《Russian Journal of Coordination Chemistry》2009,35(6):454-459
A novel binuclear Cobalt(II) complex with N-(2-propionic acid)-salicyloyl hydrazone (C10H10N2O4, H3L) was prepared and characterized. The crystal structure of [Co(C10H9N2O4)2] · 3H2O was determined by X-ray single-crystal diffractometry. The Co2+ ion is six-coordinated by the carboxyl and acyl O atoms and azomethine N atoms of two tridentate N-(2-propionicacid)-salicyloyl
hydrazone ligands, which form two stable five-numbered rings sharing one side in the keto form. The coordination environment
around the Co2+ ion might be described as a distorted octahedron. Abundant hydrogen bonds of the types O-H…N and O-H…O between the water
molecules and ligands not only form the three-dimensional network, but also provide an extrastability for the crystal. The
complex was studied for the interaction with calf thymus DNA by electronic absorption titration and emission titration. The
results show that the complex is bound to calf thymus DNA mainly by intercalation.
The article is published in the original. 相似文献
8.
V. A. Nadolinnyi T. M. Polyanskaya M. K. Drozdova O. V. Antonova A. A. Ryadun V. V. Volkov 《Russian Journal of Coordination Chemistry》2010,36(5):370-377
The influence of specific features of the structure and nature of the cations (Ph4P+, H(Phen)+, Cs+, and (CH3)4N+) on the ERP spectra of the nickel ions in salts with the dicarbollylnickelate anion [Ni(B9C2H11)2]− is studied. It is shown that the change in the cation type in these compounds results in the electron density redistribution,
which affects the change in the main and average values of the g factor. The g
av value increases over that observed in frozen solutions upon the localization of the positive charge of the cation on one
atom and in the absence of the screening effect of the solvent and large functional groups of the cation. The exception is
the compound (Ph4P+)NiCb2− (Cb is B9C2H11) with solvated CCl4 molecules. For all compounds studied, the temperature dependence of the linewidths in the EPR spectra is described by the
equation ΔH = αT + βT7 with different α and β values and is defined by the temperature dependence of the relaxation process caused by the Raman
interaction. 相似文献
9.
Yu. V. Rakitin V. T. Kalinnikov S. G. Khodasevich V. M. Novotortsev 《Russian Journal of Coordination Chemistry》2007,33(12):891-895
The electronic structures of the complex ions [CuCl4]2? and [CuCl5]3? were analyzed in terms of the extended angular overlap model (AOM) with consideration to sd and pd mixing. The total antibonding orbital energies of these ions show no anomalies in the transition from a tetrahedron to a planar square [CuCl4]2? and from a trigonal bipyramid to a tetragonal pyramid [CuCl5]3?. Presumably, the existence of numerous intermediate forms of these complexes is mainly due to the packing effects rather than the electronic factors. 相似文献
10.
V. V. Drozdova K. Yu. Zhizhin E. A. Malinina I. N. Polyakova N. T. Kuznetsov 《Russian Journal of Inorganic Chemistry》2007,52(7):996-1001
The reactions of the closo-decaborate anion with hydrogen halides and dichloroethane have been studied. Irrespective of the hydrogen halide used (HCl, HBr, HI), chlorination to give mono-, di-, and trihalosubstituted products is the major process. The product ratio depends on the hydrogen halide used and on the synthesis temperature and time. The products have been identified by 11B NMR, IR, and ESI mass spectra. The structure of (Ph3(NaphCH2)P)2B10H8Cl2 has been studied by X-ray diffraction. The geometry distortion of the closo-decaborate core found in the chlorinated derivatives is retained on further chemical transformations of the compound. 相似文献
11.
A. I. Gubanov A. M. Danilenko A. I. Smolentsev N. V. Kuratieva A. B. Venediktov S. V. Korenev 《Journal of Structural Chemistry》2016,57(8):1606-1612
Double complex salts (DCS) α-[Pd(NH3)4][IrF6]·H2O (P21/m, a = 6.3181(3) Å, b = 10.8718(5) Å, с = 7.4526(4) Å, β = 103.568(2)°), β-[Pd(NH3)4][IrF6]·H2O (P21/с, a = 8.5773(3) Å, b = 10.8791(4) Å, с = = 12.6741(3) Å, β = 122.497(2)°), [Pd(NH3)4]3[IrF6]2Cl2·H2O (P-1, a = 7.6080(2) Å, b = 7.6274(2) Å, с = 11.8070(3) Å, β = 122.497(2)°), and [Pd(NH3)4]2[IrF6]NO3 (Fm-3m, a = 11.21210(10) Å) have been synthesized and structurally characterized for the first time. The existence of polymorphs for the DCS has been revealed. The influence of the chemical composition of the initial reagents on the reaction course and, respectively, the products, has been demonstrated. A hypothesis on the influence of the second coordination sphere on the formation of one or the other polymorph of the DCS has been suggested. It has been shown that the series α-[Pd(NH3)4][МF6]·H2O (M = Pt, Pd) exhibits isostructurality. 相似文献
12.
É. B. Coropceanu A. P. Rija V. N. Shafranskii O. A. Bologa M. Gdaniec S. T. Malinovskii 《Journal of Structural Chemistry》2007,48(6):1110-1117
The complexes [Co(DH)2(Sam)2]2[ZrF6]·5H2O (I) and [Co(DH)2(Sam)2][BF4]·H2O (II), where DH? is the dimethylglyoxime monoanion, and Sam is para-aminobenzenesulfamide (sulfanilamide, white streptocid), were synthesized, and their crystal structures were determined by X-ray diffraction analysis. The coordination polyhedron of the Co3+ atom is an N6 octahedron formed by four nitrogen atoms of the two dimethylglyoxime residues and two nitrogen atoms of the Sam fragments. The latter are realized in virtually parallel orientation relative to the polyhedron of the metal atom and its equatorial plane; the average value of the dihedral angles is 26.8(1)°, and there is π-π interaction between the benzene rings of the Sam fragments and the π delocalized equatorial metallocycle. The deviation of the cobalt atom from the four-angle plane is up to 0.009(1) Å. The (Co-N)DH? and (Co-N)Sam distances in the [Co(DH)2(Sam)2]+ complex cations vary from 1.892(2) Å to 1.907(3) Å and from 2.000(2) Å to 2.012(2) Å, respectively. The [ZrF6]2? and [BF4]? complex anions play the major role in crystal formation; they produce a substantial effect on the formation of a complex system of hydrogen bonds. 相似文献
13.
A. V. Churakov E. A. Legurova A. A. Dutov P. V. Prikhodchenko T. A. Tripol’skaya 《Russian Journal of Inorganic Chemistry》2008,53(8):1187-1192
Peroxide derivatives of heteropoly compounds with Keggin anions [PW12O40]3? and [SiW12O40]4? are isolated in an individual state from concentrated hydrogen peroxide solutions and characterized by physicochemical methods. The structure of Ba2[SiW12O40] · 4H2O2 · 11H2O (I) is solved by X-ray crystallography. Crystals of compound I (H30Ba2O59Si1W12, FW = 3483.21) are monoclinic, space group C2/c, a = 24.981(2) Å, b = 12.2103(11) Å, c = 18.7142(17) Å, β = 122.620(2)o, V = 4808.0(8) Å3, Z = 4. The structure contains Keggin anions [SiW12O40]4?; all hydrogen peroxide molecules are coordinated to Ba2+ cations. 相似文献
14.
E. V. Makotchenko E. A. Bykova E. Yu. Semitut Yu. V. Shubin P. V. Snytnikov P. E. Plyusnin 《Journal of Structural Chemistry》2011,52(5):924-929
The crystal structure of a double complex salt of the composition [Au(en)2]2[Cu(C2O4)2]3·8H2O (en = ethylenediamine) at 150 K is determined by single crystal X-ray diffraction. The crystal data for C20H48Au2Cu3N8O32 are: a = 9.1761(3) Å, b = 16.9749(6) Å, c = 13.4475(5) Å, β = 104.333(1)°, V = 2029.43(12) Å3, P21/c space group, Z = 2, d x = 2.450 g/cm3. It is demonstrated that the thermal decomposition of the double complex salt in a helium or hydrogen atmosphere affords the solid solution Au0.4Cu0.6. 相似文献
15.
16.
A new compound containing the tetraphenylphosphonium cation and the nickel(III) bisdicarbollyl anion, [(C6H5)4P][Ni(B9C2H11)2]·CCl4, was synthesized and investigated by XRD at room temperature (295 K). Crystal data: C29H42B18PCl4Ni, M = 816.69, monoclinic, space group P2/c; unit cell parameters a = 13.5873(6) Å, b = 7.1475(2) Å, c = 20.7829(8) Å, β = 94.4595(13)°, V = 2012.2(2) Å3, Z = 2, d calc = 1.348 g/cm3. The structure was solved by direct and Fourier methods and refined by the full-matrix least squares method in an anisotropic (isotropic for H) approximation to the final R 1 = 0.0466 for 3055 I hkl ≥ 2σ I of 23,655 reflections collected and 5618 independent I hkl (Bruker X8 APEX diffractometer, λMoK α). 相似文献
17.
V. M. Retivov E. Yu. Matveev M. V. Lisovskiy G. A. Razgonyaeva L. I. Ochertyanova K. Yu. Zhizhin N. T. Kuznetsov 《Russian Chemical Bulletin》2010,59(3):550-555
Nucleophilic substitution at the exo-polyhedral boron atoms of claso-decaborate [B10H10]2- in the presence of carbocations, which were generated in situ from various halocarbons (triphe-nylmethyl chloride, 1-bromoadamantan, n-butyl bromide), was studied. The reactions carried out in nucleophilic solvents (cyclic ethers and thioethers, N,N-disubstituted amides, and car-boxylic acids) and in the presence of halocarbons afforded mono-and disubstituted compounds
with the exo-polyhedral B—O and B—S bonds, which contained a molecule of the solvent as substituent. The structures of the compounds synthesized
were confirmed by the IR, mass, and 1H, 11B, and 13C NMR spectra. 相似文献
18.
K. Yu. Zhizhin A. P. Zhdanov N. T. Kuznetsov 《Russian Journal of Inorganic Chemistry》2010,55(14):2089-2127
Methods of introducing functional groups into the [B10H10]2− anion based on electrophilic, radical, or nucleophilic substitution for exo-polyhedral hydrogen atoms have been surveyed. Special attention has been focused on nucleophilic substitution reactions promoted
by acids, including protonic acids, anhydrous hydrogen halides, metal halides, and carbocations. In addition, methods of tailored
functionalization of the substituents in the cluster have been described. 相似文献
19.
Evidence for the existence of primitive life forms such as lichens and fungi can be based upon the formation of oxalates.
These oxalates form as a film like deposit on rocks and other host matrices. The anhydrous oxalate mineral moolooite CuC2O4 as the natural copper(II) oxalate mineral is a classic example. Another example of a natural oxalate is the mineral wheatleyite
Na2Cu2+(C2O4)2·2H2O.
High resolution thermogravimetry coupled to evolved gas mass spectrometry shows decomposition of wheatleyite at 255°C. Two
higher temperature mass losses are observed at 324 and 349°C. Higher temperature mass losses are observed at 819, 833 and
857°C. These mass losses as confirmed by mass spectrometry are attributed to the decomposition of tennerite CuO. In comparison
the thermal decomposition of moolooite takes place at 260°C. Evolved gas mass spectrometry for moolooite shows the gas lost
at this temperature is carbon dioxide. No water evolution was observed, thus indicating the moolooite is the anhydrous copper(II)
oxalate as compared to the synthetic compound which is the dihydrate. 相似文献
20.
D. V. Korchagin E. I. Zhilyaeva G. V. Shilov N. S. Ovanesyan S. M. Aldoshin 《Russian Journal of Inorganic Chemistry》2009,54(2):226-231
Single crystals of the Na4[Na2Cr2(C2O4)6] · 10H2O complex were synthesized for the first time. The structure of the complex was determined by X-ray diffraction analysis. The compound crystallizes in the monoclinic crystal system with the unit cell parameters a = 17.290(4) Å, b = 12.521(3) Å, c = 15.149(3) Å, β = 100.45(3)°, Z = 4, space group Cc. Anionic layers [NaCr(C2O4)3] 2n 4n? can be distinguished in the crystal structure of the complex. The Na+ cations and water molecules, involved in the formation of a hydrogen bond network, are located between the anionic layers. 相似文献