Interaction of Methyl-substituted Borazines with Various Acceptor Molecules

Abstract

IT has been suggested that borazines might be expected to form molecular complexes with electron-pair acceptors¹, and interactions between hexamethylborazine and tetra-cyanoethylene² or iodine³ have been reported. In further support of this suggestion we wish to report the initial results of a spectrophotometric investigation of the interaction between methyl-substituted borazines and some acceptor molecules. Solutions of B-trimethyl-, B-trimethyl-N-methyl-, B-trimethyl-N-dimethyl-, and hexa-methyl-borazine in carbon tetrachloride and in n-heptane exhibit featureless absorption spectra in the range 600–200 mµ, but the spectra of mixtures containing these borazines and typical acceptor molecules in the same solvents exhibit bands which are not characteristic of the acceptors. (See Table 1 for some representative data.)