Effect of Br···O Bonding on the Chiral Assembly of Brominated Amides in the Crystalline Phase

Crystal Growth & Design, Journal Year: 2024, Volume and Issue: 24(22), P. 9564 - 9570

Published: Nov. 7, 2024

A cyclic triamide of 2,5-dibromo-4-ethylaminobenzoic acid, which has a fixed axial chirality, was prepared in racemic and enantiopure forms. The structures the corresponding crystals homochiral molecular assembly formation were analyzed from viewpoint intermolecular interactions. Although packing arrangements two types similar, difference suggested importance C═O···Br–C contact for chiral assembly. statistical analysis amides with above revealed correlation between type (hetero- or homochiral) angle adjacent molecules interacting through C═O···Br bonding. Specifically, absence aryl groups, O···Br–C angles closer to 180° facilitated molecule pairs into arrangement. In contrast, opposite trend observed presence one more groups. Furthermore, displayed different preferences angle, indicating its determining crystal chirality. Our approach extended scope previously reported method demonstrated applicability compounds other skeletons.

Language: Английский

Synthesis, Structural Characterization, and Theoretical Analysis of Nonconventional Bonding in Dinuclear Zinc(II) Complexes with Tridentate Schiff Bases

ACS Omega, Journal Year: 2024, Volume and Issue: 9(40), P. 41787 - 41796

Published: Sept. 27, 2024

Two tridentate N,N,O-donor ligands, HL

Language: Английский