共查询到20条相似文献,搜索用时 15 毫秒
1.
The reaction of PtRu5(CO)16(μ6-C),1 with 3-hexyne in the presence of UV irradiation produced two new electron-rich platinum-ruthenium cluster complexes PtRu5(CO)13(μ-EtC2Et)(μ3-EtC2Et)(μ5-C),2 (20% yield) and Pt2Ru6(CO)17(μ-η5-Et4C5)(μ3-EtC2Et) (μ6-C),3 (7% yield). Both compounds were characterized by single-crystal X-ray diffraction analyses. Compound2 contains of a platinum capped square pyramidal cluster of five ruthenium atoms with the carbido ligand located in the center of the square pyramid. A EtC2Et ligand bridges one of the PtRu2 triangles and the Ru-Pt bond between the apical ruthenium atom and the platinum cap. The structure of compound3 consists of an octahedral PtRu5 cluster with an interstitial carbido ligand and a platinum atom capping one of the PtRu2 triangles. There is an additional Ru(CO)2 group extending from the platinum atom in the PtRu5 cluster that contains a metallated tetraethylcyclopentadienyl ligand that bridges to the platinum capping group. There is also a EtC2Et ligand bridging one of the PtRu2 triangular faces to the capping platinum atom. Compounds2 and3 both contain two valence electrons more than the number predicted by conventional electron counting theories, and both also possess unusually long metal-metal bonds that may be related to these anomalous electron configurations. Crystal data for2, space group Pna21,a=19.951(3) Å,b=9.905(2) Å,c=17.180(2) Å,Z=2, 1844 reflections,R=0.036; for3, space group Pna21,α=13.339(1) Å,b=14.671(2) Å,c=11.748(2) Å, α=100.18(1)°, β=95.79(1)°, γ=83.671(9)°,Z=2, 3127 reflections,R=0.026. 相似文献
2.
3.
本文通过(μ-烃硫)(μ-卤化镁硫)六羰基二铁(μ-RS)(μ-XMgS)Fe2(CO)6(A)与反丁烯二酸二乙酯的加成-醇解反应合成了七个新铁硫原子簇络合物, 通式为(μ-RS)[μ-(EtO2C)CH2CH(CO2Et)S]Fe2(CO)6(B). 除用碳氢分析、IR、^1H NMR证实这些产物的结构外, 还通过其羰基取代反应, 合成了四个新双三苯膦衍生物(μ-RS).[μ-(EtO2C)CH2CH(CO2Et)S]Fe2(CO)4(PPh3)2(C), 并对它们的结构和光谱特点进行了初步讨论. 相似文献
4.
Giuliana Gervasio Domenica Marabello Enrico Sappa Andrea Secco 《Journal of Cluster Science》2008,19(1):197-208
The thermal reactions of 2-methyl-1-hexen-3-yne [CH3CH2C≡CC(=CH2)CH3, metey] with Fe3(CO)12 have been studied: cluster opening or fragmentation and alkyne dimerization occur. Main products are the open triangular isomers [Fe3(CO)6(μ-CO)2{CH3(=CH2)CC(Et)C(Et)C(=CH2)CH3}] (complex 3a) and [Fe3(CO)6(μ-CO)2{C(Et)CCH3(=CH2)C(Et)CCH3(=CH2)}] (complex 3b). The structure and isomerism of the complexes has been confirmed by X-ray studies. The minor products of the reaction have been characterized by spectroscopic techniques. An attempt at exploiting the reactivity of the “free” C=C bonds of the coordinated ene-yne was made: complex 3a was reacted with styrene under thermal conditions. Unexpectedly considerable yields of the closed triangular cluster [Fe3(CO)6{EtC2C(=CH2)CH3}2] (complex 5) have been obtained. This behaviour had not been previously observed. The unprecedented structure of complex 5 has been confirmed with an X-ray study. 相似文献
5.
《Journal of Coordination Chemistry》2012,65(1-2):63-75
Abstract Mo≡Mo triply bonded dimers [η5?RC5H4 —react with (μ,-PhSe)2Fe2 (CO)6 in boiling xylene to give selenolato-bridged bimetallic complexes [η5?RC5H4Mo(CO) (μ-SePh)]2 (R ? MeCO, MeO2C). However, irradiation of a benzene solution of —(R ? H, MeCO, EtO2C) and (μ-PhSe)2Fe2 (CO)6 with a 400W high pressure mercury lamp gave rise to selenolato-bridged trimetallic clusters η5?RC5H4MoFe2(CO)2 (μ3-Se) [μ,η:η2?C (O) Ph] (μ-SePh)2 (R ? H, MeCO, EtO2C). All products were characterized by elemental analysis and spectroscopic methods, as well as by an X-ray diffraction analysis of the product η5?MeCOC5H4MoFe2(CO)4 (μ-Se)[μ;η1:η2?C(O)Ph](μ-SePh)2. 相似文献
6.
We perform in this work a comprehensive first-principles investigation on the geometric and electronic structures of Au(BO) 2 ? and Au(BS) 2 ? which are valent isoelectronic to the well-known Au(CN) 2 ? monoanion. Au(BO) 2 ? and Au(BS) 2 ? complexes prove to possess linear ground-state structures similar to Au(CN) 2 ? and the BO? and BS? ligands in them are found to be coordinated terminally via boron atoms to gold centers which are weakly negatively charged. Au–B bonds in Au(BO) 2 ? and Au(BS) 2 ? appear to have higher Wiberg bond indices (0.79 and 0.80) and more covalent components (60 and 53 %) than the corresponding values of Au–C interaction in Au(CN) 2 ? (0.67 and 39 %, respectively) at the same theoretical levels. Their Au–B bifurcation values of the electronic localization function also turn out to be higher than Au–C. These results strongly suggest that the Au–B bonds in Au(BO) 2 ? and Au(BS) 2 ? with multiple-bond character possess stronger covalent characters than Au–C in Au(CN) 2 ? . 相似文献
7.
《Journal of organometallic chemistry》1986,311(3):C55-C59
Reactions of the phosphido-bridged complexes [Co2W(μ-H)(μ3-CC6H4Me-4)(μ-PR2)(CO)6(η-C5H5)] (R = Ph or Et) with PR2H (R = Ph or Et) or RCCR (R = Me or Et) are dominated by processes involving facile PC, CC and CH bond formation. The X-ray structures of the complexes [Co2W(μ-PEt2)3(CO)5(η-C5H5)], [Co2W{μ3-C(R)C(Et)C(Et)C(O)}(μ-CO)(CO)4(PPh2{C(Et)CHEt})(η-C5H5)], and [CoW{μ-C(R)C(Et)C(Et)C(OH)}(CO)4(η-C5H5)] (R = C6H4Me-4) have been determined. 相似文献
8.
Michael I. Bruce Natasha N. Zaitseva Brian W. Skelton Allan H. White 《Journal of Cluster Science》1996,7(2):109-119
The reaction between Ru3(3-2-PhC2C=CPh)(-dppm)(CO)8 and Co2(CO)8 afforded dark red Co2Ru3(4-C2Ph)(3-C2Ph)(-dppm)(-CO)2(CO)9, shown by an X-ray structure determination to contain a strongly twisted Co2Ru3 bow-tie cluster (central Co), to which two PhC2 units derived from cleavage of the original diyne are attached. One a these is strongly interacting with four metal atoms, the other being attached in the familiar 1,22-mode. The dppm ligand remains bridging two of the Ru atoms. 相似文献
9.
10.
Abstarct The Cp)2Ni2Fe(CO)3(µ3-C2H2) and Cp)2Ni2Fe(CO)3(µ3-C2H2) (B) complexes have been synthesized and spectroscopically characterized. An accurate X-ray study and a comparison with related structures shows that the substituents of the alkyne ligands exert considerable effects on the bonding parameters.Crystal data for complex A, monoclinic space group P21/n,a = 8.418(1),b = 15.779(2),c = 14,493(1) Å, = 91.64(1)°,Z = 4, 2753 observed reflections,R = 0.022; crystal data for complex B, monoclinic space group C2/c,a = 16.2189(7),b = 7.445(3),c = 25.745(5) Å, = 103.74(3),Z=8, 1853 observed reflections,R = 0.051. 相似文献
11.
Esra Öztürk Nilgun Kalaycioglu Ozpozan Serkan Dayan 《Journal of Thermal Analysis and Calorimetry》2014,117(2):573-578
Mn4+ doped and Dy3+, Tm3+ co-doped MgAl2Si2O8-based phosphors were prepared by conventional solid state reaction at 1,300 °C. They were characterized by thermogravimetry, differential thermal analysis, X-ray powder diffraction, photoluminescence, and scanning electron microscopy. The luminescence mechanism of the phosphors, which showed broad red emission bands in the range of 600–715 nm and had a different maximum intensity when activated by UV illumination, was discussed. Such a red emission can be attributed to the 2E → 4A2 transitions of Mn4+. 相似文献
12.
《Journal of organometallic chemistry》1989,377(1):C35-C39
Reaction of [Ru3(CO)12] with a two molar proportion of (RO)2PN(Et)P(OR)2 (R = Me or Pri) in benzene under reflux affords a number of products including [Ru3(CO)10{μ-(RO)2PN(Et)P(OR)2}], [Ru3(CO)9{μ-(RO)2PN(Et)P(OR)2}{η1-(RO)2PN(Et)P(OR)2}] and, as the major species, the tetranuclear derivative [Ru4(μ3-η2-CO)(CO)9{μ-(RO)2PN(Et)P(OR)2}2]. An X-ray diffraction study of [Ru4(μ3-η2-CO)(CO)9{μ-(MeO)2PN(Et)P(OMe)2}2] has revealed that the skeletal framework adopts a butterfly structure and that one of the carbonyl groups functions as a triply bridging four-electron donor ligand capping the two wing-tip and one of the hinge ruthenium atoms. 相似文献
13.
《结构化学》1985,(3)
<正> Mr= 873.02, orthorhombic P21212, a= 16.153(3), b= 15.718(2), c= 8.847(3) A, V= 2246.2(14)A3, Z=2, Dx? 1.291gcm-3, MoK(?), radiation, λ= 0.71069A, μ= 9.417mm-1, F(000)= 924, R(Rw)= 0.073(0.069) for 1936 observed reflections. The structure of the anion contains a FesSz core, in which each iron atom is coordinated by two μ2-S atoms and two thiolate sulfur atoms to form a distorted tetrahedron. 相似文献
14.
(μ-烃硫)[μ-α,β-双(乙氧羰基)乙基硫]六羰基二铁络合物(μ-RS)[μ-(EtO_2C)CH_2CH(CO_2Et)S]Fe_2(CO)_6的合成及其羰基取代反应的研究 总被引:1,自引:0,他引:1
本文通过(μ-烃硫)(μ-卤化镁硫)六羰基二铁(μ-RS)(μ-XMgS)Fe_2(CO)_6(A)与反丁烯二酸二乙酯的加成-醇解反应合成了七个新铁硫原子簇络合物,通式为(μ-RS)[μ-(EtO_2C)CH_2CH(CO_2Et)S]Fe_2(CO)_6(B)。除用碳氢分析,IR、~1H NMR 证实这些产物的结构外,还通过其羰基取代反应,合成了四个新双三苯膦衍生物(μ-RS)。[μ-(EtO_2C)CH_2CH(CO_2Et)S]Fe_2(CO)_4(PPh_3)_2(C),并对它们的结构和光谱特点进行了初步讨论。 相似文献
15.
16.
《结构化学》1987,(3)
<正> The crystal and molecular structure of (μ-SPh)(μ-SCH2CH2CN)Fe2-(CO)5 has been determined by X-ray diffraction method. The crystals of this complex are triclinic, space group P1,with a=ll.175(1), b=ll.877(2), c= 15.640(2)1,α=106.20(1),β=103.15(1),γ=98.46(1)°; Z=4; Dc=1.67g/cm3. The final structure refinement converged with unweighted and weighted R factors of 0.028 and 0.034 for 2853 observed unique reflections. 相似文献
17.
18.
19.