Syntheses and structure of pseudooctahedral molybdenum-η3-hexadienyl complexes

Article abstract of DOI:10.1016/0022-328X(90)87176-E

Compounds of the type 3-C5H6Me)(CO)2(MeCN)2> where X = Cl (1) and Br (2) have been prepared by oxidative addition of 1-halohexa-2,4-dienes to Mo(CO)3(MeCN)3.Addition of the bisphosphine Ph2PCH2CH2PPh2 (dppe) or 2,2'-bipyridine (bipy) to 2 gives 3-C5H6Me)(CO)2(dppe)> (3) or 3-C5H6Me)(CO)2(bipy)> <*> 1/2MeCN (4), respectively, in high yields. 1,10'-phenanthroline and 1 afforded the bright red complex 3-C5H6Me)(CO)2(phen)> (5).A crystallographic X-ray analysis showed the structure of 2 to be analogous to diether and diamine chelatespreviously reported.According to spectroscopic data the bisphosphine compound 3 adopts a different structure than 2.