Spontaneous chiral resolution of a coordination polymer with distorted helical structure consisting of achiral building blocksDedicated to Professor Peter Jutzi on the occasion of his 65th birthday.

Abstract

Reaction of achiral 2,5-diphenyl-3,4-di(3-pyridyl)cyclopenta-2,4-dien-1-one (2) with ZnCl2 and HgBr2, respectively, afforded the helically chiral coordination polymers [(2)ZnCl2]infinity and [(2)HgBr2]infinity, which show spontaneous chiral resolution, forming colonies of homochiral crystals.

Recent advances in the design and construction of helical coordination polymers

“…Except for the chiral, helical coordination polymers induced by a stereogenic center of an enantiomerically pure ligand, particularly intriguing is the formation of a homochiral helical coordination polymer from achiral components through spontaneous enantiomer resolution. This itself is by no means surprising, but much more elusive and difficult to achieve [90]. In general, how to design or make a chiral feature from extended helices without any chiral sources relies on the understanding of ligand effects and crystal packing, especially the latter.…”

“…Monolayer and Langmuir-Blodgett (LB) films are sophisticated supramolecular systems in which molecules can be orderly arranged [96,97]. Besides, on the supramolecular level, the spontaneous formation of chiral aggregate from achiral molecules is still important and currently has received much attention [98]. The knowledge of the chemistry of well-defined, helical coordination polymers is necessary for the understanding of the detection and amplification of chirality.…”

Self-assembly of a two-dimensional cluster coordination polymer {[W2S8Cu8I4(bpe)2(py)2]·H2O}n: Crystal structure and luminescent properties

“…Although the single-crystal structure determined is chiral, it is not guaranteed all crystals in the batch will be of the same enantiomorphism [3]. A disk-shaped pellet which was prepared by grinding the bulk sample with KBr powders was used in solid state CD spectrum measurement [41]. Solid state circular dichroism (CD) spectroscopy (Fig.…”

Chiral Heterocyclic Ligands. XI. Self-assembly and X-ray Crystal Structures of Chiral Silver Coordination Polymers of (S)-(–)-Nicotine

“…Various approaches have been employed in the design of homochiral coordination polymers. These include the use of chiral metal precursors [28], chiral ligands [29][30][31][32][33][34], chiral counterions [35,36], helicate formation [37][38][39][40][41] and even the use of spontaneous resolution of achiral materials [42][43][44][45].…”

“…Various approaches have been employed in the design of homochiral coordination polymers. These include the use of chiral metal precursors [28], chiral ligands [29][30][31][32][33][34], chiral counterions [35,36], helicate formation [37][38][39][40][41] and even the use of spontaneous resolution of achiral materials [42][43][44][45].We believe that the simplest approach is to use chiral bridging ligands and have recently reported the synthesis and study of some C 2 -symmetric chiral bridging ligands derived from the readily available monoterpene (+)-camphor [46,47] Crystalline products suitable for X-ray structure determination were obtained from three such reactions. Reaction of equimolar quantities of silver nitrate and nicotine in acetonitrile followed by vapour diffusion of diethyl ether into the reaction mixture furnished a crystalline product (2) that was shown by elemental analysis to have a 1:1 metal:ligand ratio.…”