(11) Because associative methanol exchange is faster than associative carbonylation for 3, similar crossover experiments could not be run with this complex. However, the similarity of carbonylation kinetics and methanol exchange for 1 and 3 suggest the mechanism of carbonylation of 3 and 5 are similar to that investigated for 1. NMR and X-ray crystallographic data show 1 and 3 are very similar, structurally.
