460984-22-9Relevant academic research and scientific papers
Regiospecific reaction between dimetallic phosphido-bridged W-W complexes and phosphane imide - Electrophilic site switching by metal-metal bond formation
Shyu, Shin-Guang,Singh, Ramsharan,Su, Chi-Jung,Lin, Kuan-Jiuh
, p. 1343 - 1348 (2007/10/03)
Reaction between CpW(CO)2(μ-PPh2)W(CO)5(W-W) (2) and Ph3P=NR (R = Pr, CH2Ph, iPr) in THF at refluxing temperature is regiospecific with the CNR ligand coordinated to the W(CO)4 unit to produce CpW(CO)2(μ-PPh2)W(CO)4-(CNR)(W-W) (4). Spectroscopic data indicate that the complex exists in two stereoisomeric forms in solution. The structure of the cis isomer was determined by a single-crystal Xray diffraction study which indicates that the CNR ligand is coordinated to the W atom of the W(CO)4 unit and cis to the phosphido bridge. Reaction between CpW(CO)3(μPPh2)W(CO)5 (1) and Ph3P=NR (R = Pr, CH2Ph, iPr) in THF under similar condition is also regiospecific. However, the CNR ligand is coordinated to the CpW site to produce CpW(CO)2(CNR)((μ-PPh2)W(CO)5 (3). There are also two stereoisomers of the complex, which were separated by column chromatography. Structures of both isomers were determined by single-crystal X-ray diffraction studies. Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002.
