ALDIMINE DERIVATIVES OF MOLYBDENUM CARBONYL

Aldimines (Ald) such as N,N'-bis(4-methylbenzylidene)-1,2-propanediamine (Ald1), N,N'-bis(4-methoxybenzylidene)-1,2-propanediamine (Ald2) or N,N'-bis(4-N,N-dimethylaminobenzylidene)-1,2-propanediamine (Ald3) reacted with MO(CO)6 to give the respective cis-[(Ald)Mo(CO)4] complexes. N,N'-bis-(4-N,N-dimethylaminobenzylidene)1,3-propanediamine, in spite of comparatively poor reactivity, gave analogous tetracarbonyl, but its 1,4-butanediamine and 1,6-hexanediamine analogues did not give similar derivatives. Ald1-Ald3 after reaction with [(Ph3P)Mo(CO)5] gave corresponding aldimine bridged dinuclear [(Ph3P)(CO)4Mo(mu-Ald)Mo(CO)4(Ph3P)]. Cis-[(Ald)Mo(CO)4] gave [(Ald) Mo(CO)3X2] when reacted with X2 (X = Br or I), but produced [(Ald)MoCl4] after reaction with chlorine. NO reacted with tetracarbonyls to yield a mixture of unusual [(NO)(Ald) MO(CO)2(NO2)] and [(NO)2(Ald)Mo(NO2)2], but NOCl yielded only [(Ald) MO(CO)2(NO)Cl].