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A. N. Nesmeyanov E. G. Perevalova L. I. Leont'eva E. V. Shumilina 《Russian Chemical Bulletin》1977,26(12):2603-2605
Conclusions The photochemical reactions of (CO)2(PPh3)MnC5H4Fe(CO)2C5H5 and (CO)2(PPh3)MnC5H4COFe(CO)2C5H5 with PPh3 gave the products of replacing the CO on the Fe atom by PPh3: respectively (CO)2(PPh3)MnC5H4Fe (CO)(PPh3)C5H5 and (CO)2(PPh3)MnC5H4COFe(CO)(PPh3)C5H5.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2813–2815, December, 1977. 相似文献
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Synthesis and Crystal Structure of (C5H5)Mo(CO)3(AuPPh3) and [(C5H5)Mo(CO)2(AuPPh3)4]PF6 CpMo(CO)3(AuPPh3) is obtained by the reaction of Li[CpMo(CO)3] with Ph3PAuCl at ?95°C in CH2Cl2. It crystallizes in the monoclinic space group C2/c with a = 2625.1(7), b = 883.2(1), c = 2328.4(7) pm, β = 116.39(1)° und Z = 8. In the complex the AuPPh3 group is coordinated to the CpMo(CO)3 fragment with a Au? Mo bond of 271,0 pm. The Mo atom thus achieves a square pyramidal coordination with the center of the Cp ring in apical position. CpMo(CO)3(AuPPh3) reacts under uv irradiation with an excess of Ph3PAuN3 to afford the cluster cation [CpMo(CO)2(AuPPh3)4]+. It crystallizes as [CpMo(CO)2(AuPPh3)4]PF6 · 2 CH2Cl2 in the orthorhombic space group P212121 with a = 1553.9(1), b = 1793.8(2), c = 2809.8(7) pm und Z = 4. The five metal atoms form a trigonal bipyramidal cluster skeleton with the Mo atom in equatorial position. The Mo? Au distances range from 275.5 to 280.8 pm, and the Au? Au distances are between 281.2 and 285.6 pm. 相似文献
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《Journal of organometallic chemistry》1987,323(2):193-197
The MoMo bond in [C5H5Mo(CO)3]2 is cleaved by ferricenium cations in the presence of additional Group V ligands under photochemical radiation (λmax > 300 nm). The mononuclear cationic complexes [C5H5Mo(CO)2L2]BF4 (L = E(C6H5)3, E = P, As, Sb, Bi; L2 = [(C6H5)2PCH2]2) are obtained in high yield. 相似文献
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合成了稀土铁双核配合物:(C5H5Fe(CO)2)LnCl2·nTHF(Ln=Nd,Sm,Gd;n=1,2)和(C5H5Fe(CO)2)(C5H4(SiMe3))·LnCl·nTHF(Ln=Nd,Sm,Gd;n=0,1,2)。元素分析,热分析,红外光谱和质谱分析确认了这两种配合物。红外光谱数据表明铁与稀土原子是以羰基桥连接。晶体结构分析表明((C5H5Fe(CO)2)Na·4THF是(C5H5Fe(CO)2)LnCl2·nTHF合成的中间体。 相似文献
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Density functional theory calculations have been carried out on the CO/H2 coadsorption on the (001), (110), and (100) surfaces of Fe5C2 for the understanding of the Fischer-Tropsch synthesis (FTS) mechanism. The stable surface species changes with the variation of the H2 and CO coverage. Along with dissociated hydrogen and adsorbed CO in 2-, 3-, and 4-fold configurations, methylidyne (C(s)H) (C(s), surface carbon), ketenylidene (C(s)CO), ketenyl (C(s)HCO), ketene (C(s)H2CO), and carbon suboxide (C(s)C2O2) are computed as thermodynamically stable surface species on Fe5C2(001) and Fe5C2(110) containing both surface iron and carbon atoms. These surface carbon species can be considered as the preliminary stages for FTS. On Fe5C2(100) with only iron atoms on the surface layer, the stable surface species is dissociated hydrogen and CO with top and 2-fold configurations. The bonding nature of these adsorbed carbon species has been analyzed. 相似文献
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《Journal of organometallic chemistry》1986,312(2):241-248
Biferrocenium tetrabromoferrate, [(C5H5)Fe(C5H4)-(C5H4)Fe(C5H5)]FeBr4 (1) obtained as a by-product in the synthesis of biferrocenium trihalide salts, crystallizes in the noncentrosymmetric orthorhombic space group, P212121: (at 296 K) a 7.492(2), b 9.903 (2), c 31.604(9) Å, V 2345(1) Å3, and Z = 4. The cation, similar to other structurally characterized biferrocenium salts, adopts a trans-configuration, but, in contrast, possesses no crystallographically imposed symmetry relating the two ferrocenyl environments. Different average Fe-ring distances at the two environments: Fe(1), 2.02(2) and Fe(2), 2.08(2) Å are typical of iron(II) and iron(III) states, respectively, indicating the presence of trapped oxidation states. Interionic contacts are both shorter and more numerous for the iron(III) ferrocenyl fragment than for the iron(II) fragment. Both ferrocenyl units have non-eclipsed ring configurations, with a staggering angle of 6.5(3)° at Fe(1) and 23.5(3)° at Fe(2). The FeBr4− counterion is tetrahedral and ordered. 相似文献
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Ellis WW Raebiger JW Curtis CJ Bruno JW DuBois DL 《Journal of the American Chemical Society》2004,126(9):2738-2743
The thermodynamic hydride donor abilities of 1-benzyl-1,4-dihydronicotinamide (BzNADH, 59 +/- 2 kcal/mol), C(5)H(5)Mo(PMe(3))(CO)(2)H (55 +/- 3 kcal/mol), and C(5)Me(5)Mo(PMe(3))(CO)(2)H (58 +/- 2 kcal/mol) have been measured in acetonitrile by calorimetric and/or equilibrium methods. The hydride donor abilities of BzNADH and C(5)H(5)Mo(PMe(3))(CO)(2)H differ by 13 and 24 kcal/mol, respectively, from those reported previously for these compounds in acetonitrile. These results require significant revisions of the hydricities reported for related NADH analogues and metal hydrides. These compounds are moderate hydride donors as compared to previously determined compounds. 相似文献
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T. Yu. Orlova Yu. S. Nekrasov P. V. Petrovskii M. G. Ezernitskaya 《Russian Chemical Bulletin》2004,53(9):1938-1941
The complex η5,η5-(CO)3Mn(C5H4-C5H4)(CO)2Fe-η1,η5-C5H4Mn(CO)3 was synthesized by the reaction of η5-Cp(CO)2Fe-η1,η5-C5H4Mn(CO)3 with BunLi (THF, ?78 °C) and then with anhydrous CuCl2. The complex μ-(C≡C)[C5H4(CO)2Fe-η1,η5-C5H4Mn(CO)3]2 was prepared by the reaction of η5-IC5H4(CO)2Fe-η1,η5-C5H4Mn(CO)3 with Me3SnC≡CSnMe3 (2:1) in the presence of Pd(MeCN)2Cl2. 相似文献
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本文用电化学方法和X射线单晶结构分析, 研究了混合簇合物(C5H5FeC5H4C2Ph)Co2(CO)6的结构, 由循环伏安结果, 分别讨论了簇合物中(C5H5FeC5H4和C2O2中心的成键性质, X射线单晶结构分析表明: 晶体属单斜晶系, 空间群为P21, 晶胞参数a=11.845(6), b=8.155(6), c=24.031(6)A, β=90.88°,晶胞中分子数Z=4, 密度Do=1.637g.cm^-^2, 分析了(C5H5FeC5H4C2Ph)Co2(CO)6的结构特点, 并从成键角度讨论了(RC2R^1)Co(CO)6类簇合物的结构随RC2R^1不同而变化的规律。 相似文献
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Sodium cyanoborohydride has been found to be very effective for the conversion of [(h5-C5H5)Fe(CO)2(h2-alkene)]+BF4? complexes to the corresponding h1-alkyl derivatives. 相似文献