Decomposition of electron-excited molecules of molybdenum and tungsten phosphine hydride and phosphine nitrogen complexes

Abstract

The kinetics and mechanism of photodehydrogenation of the phosphine hydride complexes MH4L4 (M = Mo, W; L are phosphine ligands) and the formation of coordinatively unsaturated species ML4 were studied by the absorbance of long-wavelength bands with λmax at 450–460 nm appeared in the absorption spectra of the photoproducts. The rate constants of the reactions of the coordinatively unsaturated M(DPPE)2 species (M = Mo, W; DPPE = Ph2PCH2CH2PPh2) with molecular nitrogen in benzene were determined (kW = 200 s−1, kMo = 8700 s−1).