143629-03-2Relevant academic research and scientific papers
Phosphinobenzyl- and Aryl-silanes and Their Triosmium Cluster Carbonyl Derivatives
Ang, How Ghee,Chang, Betty,Kwik, Whei Lu
, p. 2161 - 2170 (1992)
The Grignard reagents MgR(Br) (R = C6H4CH2SiMe2H-o or C6H4CH2SiMeH2-o) have been found to undergo unusual reactions with Ph2PCl to afford o-Ph2PC6H4CH2SiMe2H I and o-HMe2SiC6H4CH2PPh2 II and o-Ph2PC6H4CH2SiMeH2 III and o-H2MeSiC6H4CH2PPh2 IV respectively.Reactions of the respective bidentate ligands I, II, III and IV with gave the novel triosmium clusters 1, 2, 3 and 4 involving cleavage of one Si-H bond.Similar reactions of ligands II and IV with afforded two new clusters 5 and 6 respectively.The structures of 1, 2, 4 and 5 have been determined by single-crystal X-ray diffraction techniques.In each case, the ligand assumes a chelating mode across the long edge of the osmium triangle which is also bridged by a hydride.The high-performance liquid chromatographic behaviour of these clusters has also been determined and correlated with the size and nature of the ligands.
