Preparation and reactivity of metal-containing monomers 53. Synthesis and stability of a cluster monomer (mu-H)Os-3(mu-OCNMe2)(CO)(9)PPh2CH2CH=CH2 insolution

The stability of the complex (mu-H)Os-3(mu-OCNMe2)(CO)(9)PPh2CH2CH=CH2 (1), which contains a free unsaturated functional group in the terminal ligand PPh2CH2CH=CH2, with respect to isomerization, chelation of the ligand, and other transformations in solutions was examined. No transformations of comp lex 1 were observed in the course of synthesis from (mu-H)Os-3(mu-OCNMe2)(C O)(9)NMe3 or upon heating in solution. Complex 1 as well as which complexes (mu-H)Os-3(mu-OCNMe2)(CO)(9)PHPh2 and (mu-H)Os-3(mu-OCNMe2)(CO)(9)PPh3 whi ch were formed as admixtures, were isolated in the solid state and identifi ed by H-1,H-1-{P-31}, and H-1-{H-1} NMR, IR, and Raman spectroscopy and mas s spectrometry.