The molecular structure of the oxidised condensation product of o-benzoylbenzaldehyde and ethylenediamine

Abstract

The structure of the oxidised condensation product of o-benzoylbenzaldehyde and ethylenediamine has been shown to be 2-(1-imidazolin-2-yl)benzophenone in the crystalline state by the results of an X-ray single-crystal structure analysis on the hydrobromide. The salt crystallises in the space group P2₁2₁2₁ with four molecules of C₁₆H₁₄N₂O,HBr in the unit cell with a= 7·54 ± 0·02, b= 8·66 ± 0·02, and c= 23·30 ± 0·04 Å. The structure was refined to an R-factor of 0·11 on 1443 independent reflexions. The conformation of the molecule is discussed and compared to that of other benzophenone derivatives.