Sulfido triosmium clusters containing bridging dppm ligand: crystal structures of [Os3(CO)7(μ3-CO)(μ3-S)(μ-dppm)] and the two isomers of [Os3(CO)7(μ3-S)2(μ-dppm)]
作者:Kazi A. Azam、G.M. Golzar Hossain、Shariff E. Kabir、K.M. Abdul Malik、Md.Abdul Mottalib、Salina Perven、Nitai C. Sarker
DOI:10.1016/s0277-5387(01)00999-8
日期:2002.3
The reaction of [Os-3(CO)(10)(mu-dppm)] (1) with H2S at 110 degreesC leads to the known compound [(mu-H)(2)Os-3(CO)(7)(mu(3)-S)(P-dppm)] (2) (11%) and the new compound [Os-3(CO)(7)(mu(3)-CO)(mu(3)-S)(mu-dppm)] (3) (65%). Treatment of 1 with thiourea at 110degreesC gives 2 (70%). The analogous reaction of 1 with tetramethylthiourea at 110 degreesC yielded two 50 electron stereoisomeric compounds 4a and 4b with stoichiometry [Os-3(CO)(7)(mu(3)-S)(2)(mu-dppm)] in 16 and 64% yields, respectively. The new compounds 3, 4a and 4b were characterized by spectroscopic data and X-ray diffraction studies. Compound 3 reacts with tetramethylthiourea at 110 C to give as and 4b. Hydrogenation of 3 at 1 atmosphere pressure at 151 degreesC gives 2. (C) 2002 Elsevier Science Ltd. All rights reserved.