Electronic spectra of solid pentakis(dimethylamido)tantalum(V)

The electronic spectra of the complex TaV(NMe2)5 are characterized by amide → Ta(V) ligand-to-metal charge transfer (LMCT) transitions. In the reflectance and excitation spectrum the longest-wavelength LMCT band appears at λmax∼415 nm. The emission of Ta(NMe2)5 which originates from the lowest-energy LMCT triplet occurs at λmax=578 nm and decays with τ=0.9 μs at r.t.