Abstract
14N NQR and IR spectra of the hexamethylenetetramine(HMT)–MOH complexes (M=Li, Na, and K) were investigated at room temperature. NQR lines were assigned to two (for LiOH and NaOH complexes) and three (for KOH complex) inequivalent nitrogen sites. The frequency shift is accounted for redistribution of the charges because of the charge transfer, and the line broadening is deduced from the difference of electronegativity between the charge donor and acceptor in the hydrogen bond. For the IR spectra, there are deformations of CNC bond owing to the hydrogen bond of nitrogen in HMT with OH in MOH and the direct bonding of nitrogen with alkali metal (Li, Na, and K) ion. In view of the deformation of the CNC bond in HMT molecules from the IR results one may propose that the most important part of polarization produced by the crystalline field in the HMT complexes is the electronic polarization.
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