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

The electronic spectra of the complex Ta-V(NMe2)(5) are characterized by am ide --> Ta(V) ligand-to-metal charge transfer (LMCT) transitions. In the re flectance and excitation spectrum the longest-wavelength LMCT band appears at lambda (max) similar to 415 nm. The emission of Ta(NMe2)(5) which origin ates from the lowest-energy LMCT triplet occurs at lambda (max) = 578 nm an d decays with tau = 0.9 mus at r.t. (C) 2001 Elsevier Science B.V. All righ ts reserved.