PHOTODISSOCIATION MEASUREMENTS OF THE BOND DISSOCIATION ENERGIES OF TiZr, TiNb, AND VZr

Abstract

The bond dissociation energies of TiZr, TiNb, and VZr have been determined by the abrupt onset of predissociation revealed in the resonant two-photon ionization spectra of these molecules. The dissociation energies are $D^{0}{0}(TiZr) = 2.183 \pm 0.001$ eV, $D^{0}{0}(TiNb) = 3.092 \pm 0.001$ eV, and $D+0+0(VZr) = 2.663 \pm 0.003$ eV. In addition to the requirements for interpreting predissociation thresholds as bond dissociation energies, periodic trends in the bonding of the 3d-4d mixed transition metal diatomics are discussed.