Photoacoustic Calorimetric and Time-Resolved Infrared Studies on Unstable Dinitrogen and Dihydrogen Complexes in Hydrocarbon Solution; Estimation of V–L Bond Dissociation Enthalpies in [(η5-C5H5)V(CO)3L] Compounds (L = N2 and η2-H2)

Photoacoustic calorimetry (PAC) is used to measure energy changes associated with the photochemical reaction of [cpV(C0)₄] (cp = η⁵-C₅H₅) with H₂ and N₂ in n-heptane solution; fast time-resolved IR spectroscopy (TRIR) is used to establish the timescale of these reactions and to verify the quantum yields so that enthalpy changes can be calculated from the PAC signals and hence bond dissociation energies can be estimated