Deuterium hydrides

If, however, one replaces the H2 molecules by deuterium hydride (HD), new effects appear. While the electronic structure of HD still does not differ much from those of H2 or D2, a small, permanent dipole moment exists in the case of HD which gives rise to the allowed transitions with J — J + 1, the so-called Rq(J) lines. In Fig. 3.19, three such lines with J = 0... 2 are clearly discernible. These are superimposed with a collision-induced background, the So(0) line of HD, that peaks around 280 cm-1. Although this is not obvious from the figure, a detailed analysis shows an interference between allowed and induced lines that will concern us below. 

In a recent review, Tabisz et al. (1990) summarize the state of our understanding of the deuterium hydride spectra obtainable with and without admixtures X. 

The power to catalyse certain other reactions, in which dissociation of the molecules of hydrogen or of some other gas must occur at some stage of the reaction, is more certain evidence of chemisorption. One instance, the exchange reaction in which HD, deuterium hydride, is formed from a mixture of hydrogen and deuterium, has already been mentioned. Another is the immensely important synthesis of ammonia the reaction... 

Martin C, Coulomb J P and Ferrand M (1996), Direct measurement of the translational mobihty of deuterium hydride molecules confined in a model microporous material AIPO4-5 zeolite , Europhys Lett, 36, 503. 

THE CHANGES OF SOLID MONO-AND TETRADEUTEROMETHANE AND ENTROPY RELATIONSHIPS OF MONO-DEUTEROMETHANE CH3D AND OF DEUTERIUM HYDRIDE HD. 

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