THIENOBOREPINS - CONJUGATION CHARACTERISTICS IN BORON HETEROCYCLES

Protonolysis, complex-formation with amines, ab initio molecular orbit al calculations with 3-21 G basis set, redox potentials, and spectrosc opic features of 1-phenylthieno[3,4-d]borepin (1) and 1-phenylthieno[2 ,3-d]borepin (2) were examined. The compound 1 was shown to be more la bile than 2, which give us a guide for construction of stable heteroar omatics. Absorption and fluorescence spectra of 1 and 2 revealed the p otential ability of boron heterocycles in the field of the organic opt ical materials.