Synthesis, Characterization, and Reactivity of a d2, Mo(IV) Complex Supported by a New OCO−Trianionic Pincer Ligand

The new terphenyl pincer precursor 3,3‘ ‘-di- tert -butyl-1,1‘:3‘,1‘ ‘-terphenyl-2,2‘ ‘-diol ( 1 ) is examined for its ability to support early transition metals as a trianionic ligand. Metalation proceeds smoothly at −35 °C with Mo(NMe 2 ) 4 to provide the Mo(IV), d 2 amido−amine complex [3,3‘ ‘-di- tert -butyl-2,2‘ ‘-di(hydroxy-κO)-1,1‘:3‘,1‘ ‘-terphenyl-2‘-yl-κC 2‘ ]( N -methylmethanaminato)bis( N -methylmethanamine)molybdenum(IV), abbreviated as [ t BuOCO]Mo(NMe 2 )(NHMe 2 ) 2, ( 2 ).