Bis(2,9-dimethyl-1,10-phenanthroline-kappa N-2,N ')copper(I) hydrogen squarate hemihydrate

Abstract

In the crystal structure of the synthetically prepared title compound, [Cu(C14H12N2)(2)](C4HO4) center dot 0.5H(2)O or [Cu(dmphen) (2)](HSq) center dot 0.5H(2)O (dmphen is 2,9-dimethyl- 1,10-phenanthroline or neocuproine and HSq is hydrogen squarate), the Cu I centre has distorted tetrahedral coordination geometry comprised of four N atoms from two bidentate dmphen ligands. The squarate monoanions form a ten-membered dimer, graph set R-2(2)(10), linked by two strong intermolecular O - H center dot center dot center dot O hydrogen bonds. These squarate dimers are linked into chains that propagate along the [ 100] direction. An extensive three-dimensional network of C - H center dot center dot center dot O hydrogen bonds and pi-pi interactions is responsible for stabilization of the crystal structure.