Abstract

Symmetric-1,3,5 triazine compounds are heterocyclic ring molecules containing three nitrogen atoms at the 1,3,5 sites. Because of their inherent high symmetry and the existence of a large number of compounds with different chemical groups attached to the ring, this class of compounds is ideally suited to NQR studies. We are reporting measurements of T ★ 2 and the temperature dependence of the frequencies for a number of the nitrogen-14 NQR lines in trichloromelamine, cyanuric acid, trichloroisocyanuric acid, cyanuric chloride, and melamine. The results of these measurements yielded T ★ 2's for cyanuric chloride almost an order of magnitude larger than for the other compounds. The variations of the frequencies with temperature appear to be consistent with the Bayer—Kushida model.

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