Building a two-dimensional co-ordination polymer having a multilayered arrangement. A molecular assembly comprising hanging phenazine molecules between polymeric stair frameworks of copper(I) halides

Abstract

Three copper(I) complexes with phenazine (phz), [{Cu₂(µ-X)₂(µ-phz)}_∞](X = l 1, Br 2 or Cl 3) were synthesized and their molecular structures and packing determined by single-crystal X-ray diffraction methods. The copper atoms of the Cu₂I₂ rhomboid in 1 are bridged by phz molecules to give an infinite linear chain and the phz molecules overlap between the infinite chains with an interplanar spacing of 3.46 Å. Compounds 2 and 3 have two-dimensional sheets of hanging phz molecules between polymeric stair frameworks of CuBr and CuCl, respectively. The interplanar spacings of adjacent phz molecules for 2 and 3 are 3.40 and 3.36 Å, respectively. All three complexes exhibit an absorption band at about 710 nm characteristic of copper(I) co-ordination polymers with phz.