Synthesis of a new N,N′-ethane-1,2-bis(4-methoxyphenyl)carbothioamide ligand and its Cu(I) and Ag(I) complexes

Abstract

[Cu(H2L)(PPh3)2]NO3 · 0.5H2O (2) and [Ag(H2L)(PPh3)2]NO3 · 0.5H2O (3) complexes of a new flexible thioamide ligand; N,N′-ethane-1,2-bis(4-methoxyphenyl)carbothioamide H2L (1) have been synthesized using PPh3 as a coligand. The synthesized compounds have been characterized with the help of elemental analyses, IR, 1H, 13C and 31P NMR spectroscopy. The ligand and its Cu(I) complex have been studied by single crystal X-ray crystallography. The ligand acts as a neutral S-donor and forms a nine-membered chelate ring in [Cu(H2L)(PPh3)2]NO3 · 0.5H2O. The molecular packing is stabilized by an anionic cavity formed by intermolecular hydrogen bonding between the basal plane of the complex molecule and the nitrate ions. The square shaped columnar channel has dimensions of 5.489(25) [N(11)-H(11A)⋯O(13)⋯H(21A)N(21)] × 3.693(7) [N(11)-C(11)-C(21)-N(21)] Å. © 2007 Elsevier Ltd. All rights reserved.