Crystallization of chiral thiourea derivatives of 1-phenylethylamine: transfer of stable motifs from racemic to homochiral environment
摘要
In a series of three chiral thioureas with a 1-phenylethylamine fragment, none of the homochiral samples forms “true chiral” hydrogen-bonded motifs in the crystal, but forms dimers or chains with local symmetry from the interacting fragments, consistent with the racemic crystal pattern.