in acetonitrile under N2; a mixt. of Re-contg. compd. (1.20 mmol), Si-contg. compd. (1.20 mmol), and PPh3 (2.64 mmol) in MeCN was heated under reflux for 2 h; the soln. was filtered hot; the complex was washed with MeCN and dried under vac.; the filtrate was left to cool and after 24 h a mixt. of greenand orange crystals was formed;