Synthesis and crystal structures of the metallacyclopentane complexes (η5-cyclopentadienyl)(triphenylphosphine)(butane-1,4-diyl)cobalt(III) and (η5-pentamethylcyclopentadienyl)(triphenylphosphine)-(butane-1,4-diyl)iridium(III)

Abstract
Reactions of (3) and (4) with the organomagnesium reagents (1) or (2) lead to the metallacyclopentane derivatives (5) and (6), respectively; the X-ray structures of these compounds are reported.