204932-01-4Relevant academic research and scientific papers
Synthesis, structure and reactivity of triosmium clusters derived from the reactions of [Os3(CO)10(μ-dppm)] (dppm = Ph2PCH2PPh2) and [Os3(μ-H)(CO)8{Ph2PCH2P(Ph)C 6H4}] with PHPh2
Azam, Kazi A.,Hursthouse, Michael B.,Islam, Md. Rafiqul,Kabir, Shariff E.,Malik, K.M. Abdul,Miah, Rashid,Sudbrake, Claas,Vahrenkamp, Heinrich
, p. 1097 - 1105 (2007/10/03)
The reaction of [Os3(CO)10(μ-dppm)] 1 with diphenylphosphine in refluxing toluene led to the substituted cluster [Os3(CO)9(μ-dppm)(PHPh2)] 3 and the phosphido-bridged dihydride [Os3H(μ-H)(CO)7(μ-dppm)(μ-PPh2) 2] 4. The cluster 4 exists as three isomeric forms in solution. The 46-electron compound [Os3(μ-H)(CO)8{Ph2PCH 2P(Ph)-C6H4}] 2 reacted with an excess of PHPh2 at room temperature to yield [Os3(μ-H)(CO)8{Ph2PCH2P(Ph)C 6H4}-(PHPh2)] 5 and [Os3(CO)8(μ-dppm)(PHPh2)2] 6 in 16 and 62% yields respectively. Thermolysis of 6 in refluxing toluene gave 4 and two stereoisomeric compounds 7 and 8 with stoichiometry [Os3(μ-H)2(CO)6(μ-dppm)(μ-PPh 2)2]. The cluster 3 decarbonylated at 110°C to give the phosphido-bridged monohydride cluster [Os3(μ-H)(CO)8-(μ-dppm)(μ-PPh2)] 9 which exists as two isomers in solution. Compound 4 converts into 7 and 8 on thermolysis in toluene. All the compounds have been characterized by infrared, 1H and 31P-{1H} NMR spectroscopy and elemental analysis and in the case of 3, 4, 6 and 7 also by X-ray crystallography.
