Butadienic derivatives and metal carbonyls II. Some rearrangements of butadienic ligands in reactions with dodecacarbonyltriruthenium

Abstract

Isomerization and rearrangement of ligands L, such as 1,4-trans,trans-diphenyl-1,3-butadiene, hexadiene isomers, isoprene and 1,3-butadiene, occur in the reactions with Ru 3(CO) 12 to give trimetallic complexes of molecular formula HRu 3(O) 9(L-H), in addition to bi- and monometallic complexes of known structure. On the contrary the diene skeleton is always maintained when L is 2,3-dimethyl-1,3-butadiene. Structures of HRu 3(CO) 9(L-H) complexes are suggested and some novel features in their proton n.m.r. spectra are described.