共查询到20条相似文献,搜索用时 125 毫秒
1.
Michael I. Bruce Paul A. Humphrey Allan H. White 《Journal of organometallic chemistry》2004,689(15):2558-2561
The reaction between AuMe(PPh3) and Ru3(μ-H)3(μ3-CBr)(CO)9 (1) affords the novel heptanuclear cluster Au4Ru3(μ3-CMe)(Br)(CO)9(PPh3)3 (2), containing an Au/Ru3/Au trigonal pyramidal cluster face-capped by two Au(PPh3) groups and a CMe ligand, together with Au2Ru3(μ-H)(μ3-CMe)(CO)9(PPh3)2 (3), formed by isolobal replacement of two of the three μ-H atoms in 1 by Au(PPh3) groups. The latter co-crystallises with the analogous μ3-CH complex, as also shown spectroscopically. 相似文献
2.
Oxo/hydoxo zirconium(IV) complex of the general formula [Zr6(μ3-O)4(μ3-OH)4(OOCCH2tBu)9(μ2-OH)3]2 has been isolated, when Zr(OiPr)4 reacted with a 2-fold excess of 3,3-dimethylbutyric acid. Single crystal X-ray diffraction data, collected at 103 and 153 K, showed that the studied compound crystallizes in hexagonal system (P63/m (no. 176)). Structure consists of dimers composed of [Zr6(μ3-O)4(μ3-OH)4(OOCCH2tBu)9] sub-units, linked by six μ2-OH bridges. Infrared spectroscopic studies proved the presence of hydroxo groups in the structure of studied clusters and formation of different types of oxo/hydroxo bridges. The application of variable temperature infrared spectroscopy and differential scanning calorimetry revealed that the structure of this complex undergoes the phase transitions at 143–183 and 203–293 K. Comparison of spectral and crystallographic data suggests that these phase transitions might be related to changes in the strength of Zr–O bonds of μ2-OH bridges linking complex sub-units, and change in symmetry of the crystal lattice (from hexagonal to trigonal). Analysis of thermogravimetric data showed that decomposition of [Zr6(μ3-O)4(μ3-OH)4(OOCCH2tBu)9(μ2-OH)3]2 proceeds with complete conversion to ZrO2 (monoclinic form) between 603 and 803 K. 相似文献
3.
A new polymer azido-bridged copper(II) complex [Cu4(En)2(μ1,1-N3)4(μ1,1,1-N3)2(μ1,3-N3)2]
n
(I) (En = ethylenediamine) has been synthesized and crystallography characterized. Complex I shows one-dimensional coordination polymeric structure based on a tetranuclear cluster unit [Cu4(En)2(μ1,1-N3)4(μ1,1,1-N3)2(μ1,3-N3)2], in which the azido ions display three different bridging modes. 相似文献
4.
T. Yu. Glazunova A. I. Boltalin S. I. Troyanov 《Russian Journal of Coordination Chemistry》2005,31(4):247-252
Novel anhydrous trinuclear 3-oxo complexes of Cr(III), Cr3(3-O)(CF3COO)6(CH3COOH)2(CF3COO) (I) and of Cr(III,III,II), Cr3(3-O)(CF3COO)6(CH3COOH)2(THF) (II) (where THF is (CH2)4O) are synthesized by anodic dissolution of metallic chromium in solutions of trifluoroacetic acid in acetonitrile and in tetrahydrofuran and their structures are studied by X-ray diffraction analysis. Complex I forms orthorhombic crystals with space group Pna21, a = 9.778(1) , b = 16.042(2) , c = 22.851(4) , Z = 4, R
1 = 0.0332; complex II crystallizes in monoclinic system: space group P21/c, a = 9.866(1) , b = 17.895(2) , c = 21.167(4) , = 100.75(2)°, Z = 4, R = 0.0422. The average Cr-(3-O) distances in compounds I and II are almost equal (1.943(3) and 1.927(3) ). An average length of the Cr-O bond in octahedral surrounding of metal atoms is different in complexes I and II (1.985(4) and 2.003(3) , respectively), which is specified by different oxidation states of the metal atom. The CrCr distances lie in an interval of 3.366(1)–3.337(1) .__________Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 4, 2005, pp. 266–272.Original Russian Text Copyright © 2005 by Glazunova, Boltalin, Troyanov. 相似文献
5.
Charles E. Ellul 《Journal of organometallic chemistry》2010,695(1):6-2376
The reduction of trans-[Pd(NHC)2Cl2] (NHC = IMes, 1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene; IiPr2 = 1,3-bis-isopropylimidazol-2-ylidene) with potassium graphite under an atmosphere of CO affords the palladium NHC carbonyl clusters [Pd3(μ-CO)3(NHC)3] (NHC = IMes, 1; IiPr2, 3). Treatment of 1 with SO2 at room temperature yields the bridging SO2 complex [Pd3(μ-SO2)3(IMes)3] (4) in quantitative yield. Complexes 1, 3 and 4 have been structurally characterised by X-ray crystallography. 相似文献
6.
Reactions of [(dtc)2Mo2(S)2(μ-S)2] with one or two equivalents of CuBr in CH2Cl2 afforded two new heterobimetallic sulfide clusters, [(dtc)2Mo2(μ3-S)(μ-S)3(CuBr)] (1) and [(dtc)2Mo2(μ3-S)4(CuBr)2] (2). Both compounds were characterized by elemental analysis, IR, UV-vis and X-ray analysis. Compound 1 contains a butterfly-shaped Mo2S4Cu core in which one CuBr unit is coordinated by one bridging S and two terminal S atoms of the [(dtc)2Mo2(S)2(μ-S)2] moiety. In the structure of 2, one [(dtc)2Mo2(S)2(μ-S)2] moiety and two CuBr units are held together by six Cu-μ3-S bonds, forming a cubane-like Mo2S4Cu2 core. 相似文献
7.
P. A. Abramov M. N. Sokolov A. V. Virovets V. P. Fedin 《Journal of Structural Chemistry》2009,50(1):162-165
The crystal structure of [(C5Me4Et)3Rh3(μ3-Se)2](PF6)2 and [(C5Me4Et)2Rh2(μ2-Cl)3]PF6, obtained in the reaction of [(C5Me4Et)Rh(C6H6)](PF6)2 with ZnSe in 4M HCl under hydrothermal conditions, is determined. In agreement with the 18VE rule, the triangular cluster
contains single metal-metal bonds (Rh-Rh 2.864(1) ?), whereas they are absent in the binuclear complex (Rh ...Rh 3,216(1)
?).
Original Russian Text Copyright ? 2009 by P. A. Abramov, M. N. Sokolov, A. V. Virovets, and V. P. Fedin
__________
Translated from Zhurnal Strukturnoi Khimii, Vol. 50, No. 1, pp. 169–172, January–February, 2009. 相似文献
8.
Gloria Sánchez-Cabrera Francisco J. Zuno-Cruz María J. Rosales-Hoz 《Journal of organometallic chemistry》2007,692(11):2138-2147
The compound [Os3(CO)10(μ-Cl)(μ-AuPPh3)] (2) was prepared from the reaction between [Os3(CO)10(NCMe)2] (1) and [AuClPPh3] under mild conditions. The reaction of 2 with 4-mercaptopyridine (4-pyS) ligand yielded compounds [Os3(CO)10(μ-H)(μ-SC5H4N)] (4), formed by isolobal replacement of the fragment [AuPPh3]+ by H+ and [Os3(CO)10(μ-AuPPh3)(μ-SC5H4N)] (5). [Os3(CO)10(μ-H)(μ-SC5H4N)] (4) was also obtained by substitution of two acetonitrile ligands in the activated cluster 1 by 4-pyS, at room temperature in dichloromethane. Compounds 2-5 were characterized spectroscopically and the molecular structures of 4 and 5 in the solid state were obtained by single crystal X-ray diffraction studies. 相似文献
9.
Bojan Kozlevčar Lea Glažar Gordana Pirc Zvonko Jagličić Amalija Golobič Primož Šegedin 《Polyhedron》2007
Two novel polynuclear complexes with methanoate anions and 3-hydroxypyridine ligands [Cu(μ-HCO2)2(3-pyOH)]n (1) and [Cu2(μ-HCO2)2(μ-3-pyOH)2(3-pyOH)2(HCO2)2]n (2), respectively, were synthesized and characterized. The central copper atom in 1 is surrounded by four methanoates and a 3-pyOH molecule, forming a square-pyramidal CuO3NO chromophore. All the methanoates are bidentate and serve as bridges between the adjacent copper ions via syn-anti and anti–anti coordination. The basal square coordination axes are formed by O(syn), N(3-pyOH) (1.974(2), 2.016(2) Å) and O(anti), O(anti) (1.945(2), 1.960(2) Å), while the third O(anti) (2.247(2) Å) is on the top of the pyramid. A ferromagnetic transition with an exchange constant 2J/kB = 9.2 cm−1 is found for 1 below 20 K. This interaction probably takes place through two syn-anti methanoates extended in a chain through the 2D structure. On the other hand, two monoatomic Cu–O–Cu intra-dinuclear asymmetric (1.986(2), 2.415(2) Å) bridges of two methanoates in [Cu2(HCO2)4(3-pyOH)4] (2) are present. An elongated distorted octahedral coordination sphere around each copper(II) atom is completed by an additional monodentate terminal methanoate (1.975(2) Å), two N-coordinated 3-pyOH (2.005(2), 2.002(2) Å) and the third weakly O-coordinated 3-pyOH (2.732(2) Å). Although a shorter Cu?Cu distance is noticed in 2 than in 1 (4.690(1) Å 1, 3.442(1) Å 2), much weaker ferromagnetism is found in 2. 相似文献
10.
Michael I Bruce Andrew C Meier Allan H White 《Journal of organometallic chemistry》2004,689(5):965-970
The reaction between Ru3(μ-H){μ3-C2CPh2(OH)}(CO)9 and HCCPh, carried out in the presence of HBF4 · Me2O, afforded the cluster complexes Ru3(μ-H)(μ3-CPh2CCCCPh)(CO)9 (5) and Ru3{μ3-CPhCHCC(CPh2)CHCPh}(μ-CO)(CO)8 (6), both of which were characterised by single-crystal X-ray studies. 相似文献
11.
A. A. Pasynskii I. V. Skabitskii Yu. V. Torubaev I. M. Krylov G. G. Aleksandrov 《Russian Journal of Coordination Chemistry》2011,37(8):613-618
A reaction of the dimer [Mn(CO)4(SPh)]2 with (PPh3)2Pt(C2Ph2) gave the heterometallic complex (CO)4Mn(μ-SPh)Pt(PPh3)2 (I) and its isomer (CO)3(PPh3)Mn(μ-SPh)Pt(PPh3)(CO) (II). A reaction of complex I with a diphosphine ligand (Dppm) yielded the heterometallic complex (CO)3Mn(μ-SPh)Pt(PPh3)(Dppm) (III). Complexes I–III were characterized by X-ray diffraction. In complex I, the single Mn-Pt bond (2.6946(3) ?) is supplemented with a thiolate bridge with the shortened Pt-S and Mn-S bonds (2.3129(5)
and 2.2900(6) ?, respectively). Unlike complex I, in complex II, one phosphine group at the Pt atom is exchanged for one CO group at the Mn atom. The Mn-Pt bond (2.633(1) ?) and the thiolate
bridge (Pt-S, 2.332(2) ?; Mn-S, 2.291(2) ?) are retained. In complex III, the Mn-Pt bond (2.623(1) ?) is supplemented with thiolate (Pt-S, 2.341(2) ?; Mn-S, 2.292(2) 0?) and Dppm bridges (Pt-P,
2.240(1)?; Mn-P, 2.245(2) ?). Apparently, the Pt atom in complexes I–III is attached to the formally double bond , as in Pt complexes with olefins. 相似文献
12.
13.
用Co2(CO)8分别与两个杂环配体C(S)NHP(S)(C6H4OCH3)OC(Ph)CH (L1)和C(S)NHC(CH3)2P(S)(Cl)N(Ph) (L2)反应,合成两个新的三核钴羰基硫簇合物Co3(CO)7(μ3-S)[μ,η2-CNP(S)(C6H4OCH3)OC(Ph)CH](Ⅰ)和Co3(CO)7(μ3-S)[μ,η2-SCNC(CH3)2P(S)(Cl)N(Ph)](Ⅱ)。用元素分析,IR, 1H NMR, 31P NMR及MS谱表征了它们的结构,同时用X射线衍射法测定了它们的晶体分子结构,二者属于三斜晶系,空间群P1,Ⅰ的晶胞参数为:a=0.84768(1)nm,b=1.19049(3)nm,c=1.43639(1)nm,α=86.926(1)°,β=81.601(3)°,γ=88.535(2)°,V=1.4318(5)nm3,Z=2,Dc=1.641g·cm-3,F(000)=716,μ=1.893mm-1,R=0.0602,Rw=0.1515。Ⅱ的晶胞参数为:a=1.2050(2)nm,b=1.2448(2)nm,c=0.8951(2)nm,α=97.49(1)°,β=93.552(4)°,γ=108.432(3)°,V=1.2554(3)nm3,Z=2,Dc=1.841g·cm-3,F(000)=690,μ=2.419mm-1,R=0.0423,Rw=0.1075。Ⅰ和Ⅱ的分子骨架Co3S为三角锥构型,S作为面桥基配体,所有CO作为端基配体与三个Co原子成键。Ⅰ中含有CoCoCN四元环组件,Ⅱ中含有CoCoSCN五元环组件。 相似文献
14.
Francesco Avanzini Maurizio Casarin Daniel Forrer Luciano Pandolfo Mauro Sambi Andrea Vittadini 《Theoretical chemistry accounts》2012,131(3):1166
Experimental and theoretical results pertaining to [Zn10(μ4-S)(μ3-S)6(Py)9(SO4)3], a possible molecular model of ZnS S-terminated polar surfaces, as well as a potential source of strictly monodispersed
ZnS quantum dots, are presented and discussed. The results of density functional theory (DFT) calculations provided a rationale
for the peculiar arrangement of [Zn10(μ4-S)(μ3-S)6(Py)9(SO4)3] clusters in the solid state, contemporarily indicating the unsuitability of the isolated species to mimic whatever (polar
or non-polar) ZnS surface. Despite the fact that such a failure is further confirmed by time-dependent DFT and UV–Vis diffuse
reflectance spectroscopy, the combined use of theoretical outcomes, DRIFT measurements, and literature data pertaining to
the surface chemical properties of ZnS (Hertl in Langmuir 4:594, 1988) ultimately testifies that [Zn10(μ4-S)(μ3-S)6(Py)9(SO4)3] is perfectly suited to model the interaction of pyridine molecules with ZnS surface Lewis acid sites. The herein reported
theoretical results are expected to be a useful reference for the interpretation of chemisorption experiments of Py-based
Lewis bases on single crystal ZnS surfaces. 相似文献
15.
Van An Du Gregor N. Stipicic Maria Bendova Ulrich Schubert 《Monatshefte für Chemie / Chemical Monthly》2010,10(2):671-675
Abstract
Thermolysis of cis-Fe(CO)4(SiCl3)2 results in the formation of the novel compound Fe2(CO)6(μ2-SiCl2)3, which was characterized by single crystal X-ray diffraction. Density functional theory calculations were carried out to elucidate possible reaction steps leading to the formation of Fe2(CO)6(SiCl2)3, including CO dissociation and chlorine abstraction by a SiCl3 radical generated from homolytic Fe–Si bond cleavage involving a singlet–triplet intersystem crossing. 相似文献16.
Maxim N. Sokolov Artyom L. Gushchin Dmitrii Yu. Naumov Olga A. Gerasko Vladimir P. Fedin 《Journal of Cluster Science》2005,16(3):309-318
Mechanochemical reaction of cluster coordination polymers
(Q=S, Se) with solid
leads to the cluster core excision with the formation of anionic complexes
. Extraction of the reaction mixture with water followed by crystallization gives crystalline
(main product) and
(1) (minor product). In the case of the Se cluster, the
complex could not be isolated, and the treatment of the aqueous extract with PPh3 gave
(2) in a low yield. Alternatively, it was obtained from
and
in high yield. Both 1 and 2 were characterized by X-ray structure analysis.
Dedicated to Academician I. I. Moiseev on the occasion of his 75th birthday and in recognition of his outstanding contribution
to cluster chemistry. 相似文献
17.
Yong Leng Kelvin Tan 《Journal of organometallic chemistry》2006,691(9):2048-2054
The heteronuclear cluster RuOs3(μ-H)2(CO)13 (4) reacts with refluxing toluene to form the clusters Ru2Os3(μ-H)2(CO)16 (5) RuOs3(CO)9(μ-CO)2(η6-C6H5Me) (6) and Ru2Os3(CO)12(μ-CO)(η6-C6H5Me) (7). Cluster 5 exists as a mixture of five isomers. The inter-relationship among the clusters has also been investigated. 相似文献
18.
19.
Yong Leng Kelvin Tan 《Journal of organometallic chemistry》2007,692(4):768-773
The heteronuclear cluster RuOs3(μ-H)2(CO)13 (1) reacts with indene under thermal activation to afford the novel clusters RuOs3(μ-H)(CO)9(μ-CO)2(η5-C9H7) (3), RuOs3(μ-H)(CO)9(μ3,η5:η2:η2-C9H7) (4) and Ru2Os3(μ-H)(CO)11(μ3,η5:η2:η2-C9H7) (5), the latter two possessing indenyl ligands in the μ3,η5:η2:η2 bonding mode. Cluster 5 exists as a mixture of two isomers. The inter-relationship among the clusters has also been investigated. 相似文献
20.
I. V. Anan’ev M. A. Yakovleva E. V. Perova S. E. Nefedov 《Russian Journal of Inorganic Chemistry》2010,55(7):1057-1063
The product of the thermal reaction between cobalt acetate hydrate and benzoic acid reacts with a triethylamine excess to
form the trinuclear complex Co3(μ-OOCPh)4(μ,η2-OOCPh)2[OC(Ph)OHNEt3]2, and its reaction with 3,5-dimethylpyrazole yields the mononuclear complex Co(Hdmpz)2(OOCPh)2. The compound structures are discussed on the basis of X-ray crystallographic data. 相似文献