Some unsaturated heterocyclic complexes containing two nitrogen atoms and molybdenum or tungsten

Abstract

Treatment of the anions Na⁺[(π-C₅H₅)(CO)₃Mo (or W)] with ethyl diazoacetate and hydrolysis gives the neutral complexes [graphic omitted]·OH [M =(π-C₅H₅)(CO)₂Mo (or W)]. They are monobasic and protonate forming the cations [[graphic omitted]·OH]⁺. In strong base the neutral complexes form the anions [[graphic omitted]·OH]^– which are isolated as tetra-n-butylammonium salts. The anions react with methyl iodide forming the neutral methyl derivatives [graphic omitted]·OH which are also monobasic and protonate forming the cations [[graphic omitted]·OH]⁺. ¹H N.m.r. and i.r. data are reported and discussed.