Reactions of coordinated dinitrogen. 3. Reactions of iodoalkanes with bis(dinitrogen)bis[ethylenebis(diphenylphosphine)]molybdenum

Article abstract of DOI:10.1021/ic50215a007

Bis(dinitrogen)bis[ethylenebis(diphenylphosphine)]molybdenum, Mo(N₂)₂(dppe)₂ (1), reacts with CH₃I, n-C₄H₉I, C₆H₁₁I, and n-C₈H₁₇I, respectively, to form the corresponding 2-alkyldiazenido-N derivative, MoI(N₂R)(dppe)₂, with loss of 1 equiv of dinitrogen. In benzene solution, these reactions occur slowly in the dark but much faster in light. The carbon-bound nitrogen atom is protonated by strong acid to form 2-alkylhydrazido(2-)-N complexes of the type [MoI(N₂HR)(dppe)₂]⁺. MoI(N₂C₆H₁₁)(dppe)₂ is converted into Mo(OH)(N₂C₆H₁₁)(dppe)₂ when it is eluted on an alumina column with tetrahydrofuran. The ν(NN) stretching frequency has moved 75 cm^-1 to lower energy. The preparation and characterization of all new compounds are presented together with a discussion of their spectral properties.