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1.
Pasynskii A. A. Semenova N. I. Torubaev Yu. V. Belousov P. V. Galustyan A. R. Lyssenko K. A. 《Russian Chemical Bulletin》2003,52(4):944-951
The reactions of Fe2Se2(CO)6 (1b) with Ru(CO)4(C2H4), Mn2(CO)10, or Np"Re(CO)2THF gave the known cluster Fe2RuSe2(CO)9 (4b) and new clusters (CO)6Fe2Se2Mn2(CO)8 (5) and Cp"Re(CO)2Se2Fe2(CO)6 (6). By successive reactions of Mo(CO)5THF with 1b and Fe2Te2(CO)6, the new heterometallic heterochalcogenide cluster Fe2(CO)6(3-Se)2Mo(CO)2(3-Te)2Fe2(CO)6 (8) was synthesized. The structures of 4b, 5, and 6 were determined by X-ray diffraction analysis. 相似文献
2.
Stepwise decarbonylation of the platinum complex with cymanthrenylthiolate ligands cis-(Ph3P)2Pt[(SC5H4)Mn(CO)3]2 (1) affords the cis-(Ph3P)2Pt[(SC5H4)Mn(CO)3]-[(SC5H4)Mn(CO)2] (2) and cis-(Ph3P)2Pt[(SC5H4)Mn(CO)2]2 (3) complexes. The replacement of one carbonyl group at the manganese atom with the lone electron pair of sulfur is accompanied
by the formation of a new Mn-S bond giving rise to an unusual norbornane-type core. Complexes 1–3 were characterized by elemental analysis and IR spectroscopy. The structures of complexes 1–3 were established by single-crystal X-ray diffraction.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1508–1512, July, 2005. 相似文献
3.
Eight isostructural polymeric coordination compounds of the general formula [Ln(DMF)(H2O)4][Ln(DMF)2(H2O)4][M4Te4(CN)12]·DMF·nH2O (Ln = Er, Ho, Gd, or Sm; M = W or Mo) were prepared for the first time by evaporation in air of aqueous solutions containing the cuboidal telluride anionic complex of tungsten [W4Te4(CN)12]6– or molybdenum [Mo4Te4(CN)12]7–, lanthanide chlorides, and dimethylformamide. The resulting polymeric coordination complexes with layered structures were characterized by X-ray diffraction analysis and IR spectra. The magnetic susceptibilities of the gadolinium complexes were measured. 相似文献
4.
O. K. Sharutina V. A. Senchurin V. V. Sharutin G. K. Fukin L. N. Zakharov A. I. Yanovsky Yu. T. Struchkov 《Russian Chemical Bulletin》1996,45(1):186-190
Acyloxy derivatives of tetra phenylantinmony of the general formula Ph4SbOC(O)R (R = Alk or Ar) have been synthesized by the reaction of pemaphenylantimony with carboxylic acids. Thermolysis of the compounds obtained affords phenyl carboxylates and triphenylstibine in quantitative yields. One of these compounds (R = CH=CHPh) has been studied by X-ray structural analysis. In this compound, the Sb atom has a trigonal-bipyramidal coordination. The Sb-O(Ph)eq distances are in the range 2.103(4)-2.140(5) A; the Sb-C(Ph)ax bond length is 2.167(5) A. The fragment of the residue of cinnamic acid has a delocalized double bond in the carboxylate group.Yu. T. Struchkov deceased in 1995.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 194–198, January, 1996. 相似文献
5.
Michael I. Bruce Martin Jevric Mark E. Smith Natasha N. Zaitseva 《Journal of organometallic chemistry》2006,691(3):361-370
The syntheses of several diynylgold(I) phosphine complexes, including Au(CCCCH){P(tol)3} (1), Au(CCCCSiMe3)(PR3) (R = Ph 2-Ph, tol 2-tol), Au(CCCCFc)(PPh3) (3), {(tol)3P}Au(CC)nAu{P(tol)3} [n = 2 (4), 3 (6), 4 (7)], {(Ph3P)Au}CCCC{Au[P(tol)3]} (5), [ppn][Au{CCCCAu[P(tol)3]}2] (8), [Au2(μ-I)(μ-dppm)2][Au(CCCCSiMe3)2] (9), Hg{CCCCAu(PR3)}2 (R = Ph 10-Ph, tol 10-tol) and {(triphos)Cu}CCCC{Au[P(tol)3]} (11) are described. Of these, the X-ray molecular structures of 1, 2-tol, 3, 4 and 9 have been determined. 相似文献
6.
Thermal treatment of the pyridyl side chain functionalized tetramethyl cyclopentadiene C5Me4CH2(C5H4N) with Fe(CO)5, Ru3(CO)12 and Mo(CO)6 in refluxing xylene respectively gave the corresponding dinuclear metal carbonyl complexes 1~3. These complexes have been characterized by elemental analysis, IR and 1H NMR spectra. The molecular structures of 1~3 were determined by X-ray diffraction analysis. 相似文献
7.
The results of studies of rhenium chalcogenide cluster complexes with the [Re4Q4] cubane core, where Q = S, Se, or Te, are reviewed. Different approaches to the synthesis of these compounds are surveyed and their properties and structures are considered. Substitution reactions in the cluster core and replacements of terminal ligands are discussed. The formation of polymers consisting of the tetranuclear rhenium chalcogenide cyanide clusters as structural building blocks is considered. 相似文献
8.
Elena Lizarraga C. Zabaleta J. A. Palop 《Journal of Thermal Analysis and Calorimetry》2008,93(3):887-898
The thermal decomposition of a series of compounds has been studied by thermogravimetry, mass spectrometry, nuclear magnetic
resonance and elemental analysis. The combined use of mass spectrometry and thermogravimetry (MS and TG) in the analysis of
these compounds has allowed characterization of the fragmentation pattern which was the objective of this research. The gaseous
products, volatile condensed products and solid residues were identified by NMR and MS. Based on the product of thermal decomposition,
the mechanism of thermal decomposition has been derived. 相似文献
9.
Lemenovskii D. A. Makarov M. V. Dyadchenko V. P. Bruce A. E. Bruce M. R. M. Larkin S. A. Averkiev B. B. Starikova Z. A. Antipin M. Yu. 《Russian Chemical Bulletin》2003,52(3):607-615
Arylation of ferrocene with substituted biphenyldiazonium tetrafluoroborates afforded 4-bromo-, 4-nitro-, and 4-cyano-4"-ferrocenylbiphenyls. 4-Nitro- and 4-cyano-4"-ferrocenylbiphenyls were studied by X-ray diffraction analysis. In the crystals of 4-nitro-4"-ferrocenylbiphenyl, the molecules are linked via stacking - interactions. 相似文献
10.
A. V. Safronova L. N. Bochkarev N. E. Stolyarova I. K. Grigorieva I. P. Malysheva G. V. Basova G. K. Fukin E. V. Baranov Yu. A. Kurskii G. A. Abakumov 《Russian Chemical Bulletin》2006,55(2):218-221
New germanium-containing tungsten carbyne complexes Ph3GeC≡W(CH2R)3 (R = But or SiMe3) were synthesized by the reaction of the alkoxy derivative Ph3GeC≡W(OBut)3 with alkyllithium reagents RCH2Li. The new compounds were isolated in individual form as crystals in 95 and 90% yields, respectively, and were characterized
by elemental analysis, 1H and 13C NMR spectroscopy, and X-ray diffraction. X-ray diffraction study showed that the coordination environment of the W and Ge
atoms in the Ph3GeC≡ W(CH2But)3 and Ph3GeC≡W(CH2SiMe3)3 complexes can be described as a distorted tetrahedron.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 213—216, February, 2006. 相似文献
11.
The compound [Mn(H2O)4]3[W4S4(CN)12]·nH2O (1) was prepared by the reaction of an aqueous solution of MnSO4 with a glycerol solution of KCs5[W4S4(CN)12]·4H2O. Complex 1 was characterized by X-ray diffraction analysis and IR spectroscopy. According to the X-ray diffraction data, the three-dimensional polymeric framework of 1 comprises only 24.2% of the unit-cell volume. The volume of the cavities per formula unit is 1664 3. The cavities are occupied by highly disordered water molecules. 相似文献
12.
Complexes of azobisisobutyronitrile (AIBN) with titanium tetrachloride and vanadium tetrachloride have been synthesized and characterized. It was demonstrated that Ti(IV) and V(IV) form equimolar complexes with AIBN, with nitrile ligands located incis positions in the coordination spheres of metal atoms. Kinetics of thermal decomposition of free and complexed AIBN were studied and compared. The gas evolution rate was measured in the presence of tetrabutoxytitanium, which does not react with AIBN. It was demonstrated that complexing leads to a marked increase of the rate constant of AIBN thermal decomposition.Institute of Chemical Physics, Chernogolovka, Russian Academy of Sciences, 142432 Chernogolovka. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 8, pp. 1746–1754, August, 1992. 相似文献
13.
The phase transitions and thermal effects occurring during annealing in air of material with general formula CrOx (x≥2.4) have been investigated. The investigations were performed with TG, DTA, DSC, EGA, XRD and other spectral techniques.
The formation of an amorphous phase with average composition Cr5O12 in the range 300-400°C has been observed. Further heating leads to partial loss of oxygen, simultaneous decay of Cr2O5 and CrO2 phases and formation of nonstoichiometric Cr2O3+x. The distinct loss of mass is observed in the range 415-428°C, connected with evolving oxygen and small amount of nitric
oxides. Thermal effects accompanying the mass changes depend on the mass of the sample. When the mass decreases, the transition
from exothermic to endothermic effects is observed. This phenomenon can be explained as the competition between two processes:
reconstruction of the crystalline lattice (endothermic effect) and recombination of the evolved atomic oxygen (exothermic
effect).
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
14.
Małecka Barbara Drożdż-Cieíla Ewa Olszewski P. K. 《Journal of Thermal Analysis and Calorimetry》2003,74(2):485-490
The kinetics of manganese(II) oxalate thermal decomposition in the helium atmosphere was studied on the basis of isothermal
measurements in the temperature range from 608 to 623 K. Manganese(II) oxide, MnO, was found to be the final product of reaction.
The Avrami-Erofeev kinetic equation was used to describe all the experimental data in the range of decomposition degrees from
0.1 to 0.9. The determined activation energy equals 184.7 kJ mol-1 with standard deviation ±5.2 kJ mol-1. The estimated value of parameter n is 1.9 with standard deviation ±0.01 what suggests that the rate limiting step of MnC2O4 decomposition is the nucleation of new MnO phase and that the rate of nuclei growth is rising during decomposition.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
15.
Hydrazo-carbonates are complex compounds and products of the reactions between solutions of metal ion and solutions of hydrazido-carbonic acid. The decomposition of Mg(N2H3COO)2. 2H2O, Ca(N2H3COO)2·H2O and Zn(N2H3COO)2 in inert atmosphere were studied. By classical thermoanalytical methods and data on the composition of the intermediates and final products the mechanisms of the thermal decomposition could not be resolved therefore also evolved gas analysis was used (EGA). The first step of thermal decomposition of Ca and Mg hydrazidocarbonates is dehydration. With the heating the decomposition of the hydrazido-carbonates proceeds under evolution of the ammonia, carbon monoxide and/or nitrogen and carbon dioxide giving as the intermediates for calcium and magnesium compounds the corresponding carbonates oxides as the final products. The zinc compound decomposes to the oxide, ZnO but also zinc cyanamide was detected during to the thermal treatment. 相似文献
16.
E. Marceau D. Busatto G. Papin M. Michaud 《Journal of Thermal Analysis and Calorimetry》1996,46(1):27-37
The thermal decomposition of the only known antimony nitrate antimony(III) oxide hydroxide nitrate Sb4O4(OH)2(NO3)2, whose synthesis routes were reviewed and optimized was followed by TG-DTA under an argon flow, from room temperature up to 750°C. Chemical analysis (for hydrogen and nitrogen) performed on samples treated at different temperatures showed that an amorphous oxide hydroxide nitrate appeared first at 175°C, and decomposed into an amorphous oxide nitrate above 500°C. Above 700°C, Sb6O13 and traces of -Sb2O4 crystallized.Author to whom all correspondence should be addressed 相似文献
17.
The paper presents a new, nonconventional method, based upon coprecipitation, for the synthesis of niobium oxidic compounds. The coprecipitation product of niobic acid with calcium oxalate was used as precursor. Calcium metaniobate was obtained by appropriate thermal treatment of the coprecipitate. The coprecipitation mechanism was studied and the optimal conditions for quantitative precipitation of niobium and calcium were established. The mechanism of thermal decomposition of the coprecipitate was investigated by means of differential thermal analysis and X-ray powder diagrams. The final product of thermal decomposition, calcium metaniobate, is formed at 730°C. 相似文献
18.
Syntheses,structures, thermal stabilities and bacteriostatic activities of four lanthanide complexes
Four lanthanide complexes, [La2(2,4-DClBA)6(5,5′-DM-2,2′-bipy)2(H2O)2]·2C2H5OH (1) and [Ln(2,4-DClBA)3(5,5′-DM-2,2′-bipy)(C2H5OH)]2 (Ln = Pr(2), Sm(3), Gd(4); 2,4-DClBA = 2,4-dichlorobenzoate; 5,5′-DM-2,2′-bipy = 5,5′-dimethyl-2,2′-bipyridine), were synthesized and characterized via elemental analysis, infrared spectra and thermogravimetric analysis (TG). The crystal structures of 1 and 2–4 are different; Each La3+ is nine-coordinate adopting a distorted mono-capped square antiprism, while the Ln3+ ions of 2–4 are all eight-coordinate with a distorted square antiprismatic molecular geometry. There are subtle changes in the local coordination geometry of the lanthanide–5,5′-DM-2,2′-bipy complexes. Binuclear 1 complexes are stitched together via two kinds of hydrogen bonding interactions (OH?O and CH?O) to form 1-D chains along the y axis, while the units of 2–4 are stitched together via CH?O to form 1-D chains along the x axis. TG analysis revealed thermal decomposition processes and thermal stabilities of the complexes. The bacteriostatic activities of the complexes were evaluated against Candida albicans, Escherichia coli, and Staphylococcus aureus. 相似文献
19.
P.S. Koroteev M.A. KiskinZh.V. Dobrokhotova A.S. BogomyakovN.N. Efimov V.M. Novotortsev 《Polyhedron》2011,30(15):2523-2529
New rare-earth cymantrenecarboxylates [Nd2(μ2-OOCCym)4(OOCCym)2(THF)4] (1) and [Ln2(μ2-OOCCym)4(OOCCym)2(THF)4]·THF (Ln = Gd (2), Eu (3); Cym = (η5-C5H4)Mn(CO)3) were synthesized starting from carboxycymantrene and lanthanide nitrates, and characterized by X-ray diffraction. The crystals of 1-3 consist of isolated binuclear molecules; the Ln atoms are eight-coordinate. The magnetic properties of 2 are indicative of antiferromagnetic coupling between the Gd atoms at liquid helium temperature. The thermal decomposition of complexes 1-3 was studied by differential scanning calorimetry (DSC) and thermogravimetry (TG). According to the X-ray powder diffraction patterns, the thermal decomposition of the complexes in air affords a mixture of LnMn2O5 and Mn2O3 as the final products. 相似文献
20.
Samsonenko D. G. Sokolov M. N. Gerasko O. A. Virovets A. V. Lipkowski J. Fenske D. Fedin V. P. 《Russian Chemical Bulletin》2003,52(10):2132-2139
Slow evaporation of solutions of samarium nitrate and thorium chloride in hydrochloric acid containing the macrocyclic cavitand cucurbituril (C36H36N24O12) afforded crystals of the [{Sm(H2O)5(NO3)}2(C36H36N24O12)](NO3)4·6.5H2O and [{Th(H2O)5Cl}2(C36H36N24O12)]Cl6·13H2O complexes, respectively. The [Sm(C36H36N24O12)(H2O)5(SO4)][Sm(H2O)5(SO4)2]·17H2O complex was generated upon heating (130 °C) of a mixture of samarium sulfate, cucurbituril, and water in a sealed tube. X-ray diffraction analysis demonstrated that the metal atoms in these complexes are bound to the portal oxygen atoms of the cucurbituril molecules. In addition, the portal oxygen atoms of cucurbituril are linked to the coordinated H2O molecules via hydrogen bonds. 相似文献