catena-Poly[[[aqua[3-(2-pyridylsulfanyl)propionatoN-oxide-κO¹]copper(II)]-μ-[3-(2-pyridylsulfanyl)propionatoN-oxide-κ³O³:O¹,O^1′] dihydrate]

Abstract

In the title complex, {[Cu(C8H8NO3S)2(H2O)] x 2 H2O}n, the Cu(II) cation has a distorted square-pyramidal coordination environment consisting of five O atoms, one from a water molecule, one from an N-O group and the other three from the carboxylate groups of two 3-(2-pyridylsulfanyl)propionate N-oxide anions. The aqua[3-(2-pyridylsulfanyl)propionato N-oxide]copper(II) moieties are bridged by 3-(2-pyridylsulfanyl)propionate N-oxide anions to form an infinite three-dimensional coordination polymer with a zigzag chain structure. The crystal structure is stabilized by hydrogen bonds.

Supramolecular network formed through O-H⋯O and π-π stacking interactions: Hydrothermal syntheses and crystal structures of M(H2O)6](optp)2 (M = Mg, Ni, Zn, and optp = 1-oxopyridinium-2-thiopropionate)

“…This prompted us to undertake a systematic study of Hoptp complexation reactions with alkaline earth metal and transition metals. 6,7 The ligand Hoptp possesses several features: (i) it is a polydentate ligand of up to four donor atoms; (ii) the N-oxide group has been proved to be more versatile in the coordination mode than pyridine ring because the N-oxide's O atom with more lone electron pairs of different orientations provides more flexibility in its coordination geometry than the pyridine's N-atom, which affords straight coordination geometry only; (iii) the steric hindrance is much smaller for N-oxide, and in addition, it has the capability of hydrogen bonding; (iv) some N-oxides possess important antimicrobial activity; 8 (v) N-oxides are recognized as potential DNA cleaving agents. 9 Also the pyridine-N-oxide derivatives represent a peculiar class of antiviral compounds that qualify as promising novel drugs for exploration as potential anti-HIV agents.…”