Thermal Reactions of RuCO)3(C2H4)2 with Acrylic, Non-Conjugated Dienes and Photochemistry of Ru(CO)4(eta squared-diene) Complexes

摘要

We wish to report the photochemistry of Ru(CO)4 (ETA squared-diene) (diene = 1,4-pentadiene, 3-methyl-1,4-pentadiene, 1,5-hexadiene, 1,6-heptadiene) complexes and the thermal reaction of Ru(CO)3(C2H4)2 with these dienes. We and others have previously reported the photochemical generation of catalytic intermediates at low temperatures as a means of investigating reactions of alkene complexes. In particular, we examined the photoassisted alkene isomerization catalysts derived from Fe(CO)5 and Ru3(CO)12.10-13. The key intermediate, HM(CO)3(eta3-C3H5), can be observed spectroscopically in a low temperature matrix. However, the absence of synthetic routes to M(CO)n(non-conjugated diene) complexes has hindered mechanistic studies of transition metal carbonyl catalyzed isomerization of non-conjugated dienes. Pentadienes. (mjm)