Preparation and conformation of B-triethynylborazine derivatives

Article abstract of DOI:10.1021/ic50027a013

B-Triethynylborazine derivatives were prepared and characterized. N.m.r. spectra and ultraviolet spectra showed that the phenyl group directly attached to the borazine ring inclines at a large angle depending on the size of ortho substituents and that insertion of a C≡C group between the two rings releases the steric hindrance to allow a coplanar structure. These borazines were submitted to a preliminary hydrolysis experiment to appraise the resonance effect on their stabilities.