Dissociation Energies of Ti2 and V2

The Ti2 and V2 molecules have been shown to exist over liquid titanium and vanadium at temperatures above 2050°K. Using information derived from a combination of effusion and mass-spectrometric techniques, the dissociation energies of Ti2 and V2 have been estimated from the ratio of the dimeric and monomeric species in equilibrium with the liquid metals: The values as obtained by the second-law method are D°0(Ti2) = 28.3 ± 4 kcal and D°0(V2) = 57.5 ± 3 kcal and by the third-law are D°0(Ti2) = 32.8 ± 5 kcal and D°0(V2) = 56.9 ± 5 kcal.