Fig. 1: Synthesis and crystal structures of ATTC-Cu complexes.
From: Cu(I)-thioether coordination complexes based on a chiral cyclic β-amino acid ligand
a Chemical structures of trans-4-aminotetrahydrothiopehen-3-carboxylic acid (ATTC) monomer 1 and corresponding Cu(I) complexes explored in this study. b The crystal structure of CuCl-1 represents a 3:1 ligand-metal discrete complex with C3 tetragonal geometry, which is stabilized by hydrogen bonding (indicated by black dotted lines) between the carbamate N–H and chloride anion. The three molecules of 1 exhibit a clockwise arrangement. c CuBr-1 and CuBr-ent-1 crystal structures resemble CuCl-1 but display slight elongation. d Crystal structure of CuI-1 incorporates two distinct types of Cu2I2 rhomboid complexes with C2 symmetry. Linear 4:4 coordination polymer (highlighted by a gray arrow against a blue backdrop) along the c-axis is stabilized through hydrogen bonding (marked by black dotted lines). The two types of rhomboids alternate in their arrangement. The three-dimensional packing structure of CuI-1 features a layered structure where each layer of coordination polymers is oriented in the opposite direction.
