Structure and spectroscopic characteristics of 2′-diethylboryl-4″-dimethylaminochalcone bearing an intramolecular boron–oxygen coordinate bond

Abstract

How formation of an intramolecular coordinate bond affects the molecular structure was examined in the structural comparison of 2′-diethylboryl-4″-dimethylaminochalcone (1) and 2′-ethylenedioxyboryl-4″-dimethylaminochalcone (2) with chloro- {2-[(4-dimethylaminostyryl) carbonyl]phenyl}(4-methyl- phenyl)]bismuthane (3) and 4″-dimethylaminochalcone (4).