Complexation of Cd(SeCN)₂ with imidazolidine-2-thione and its derivatives: Solid state, solution NMR and anti-bacterial studies

Article type: Research Article

Authors: Al-Maythalony, Bassem A. | Wazeer, Mohammed I.M.^; | Isab, Anvarhusein A. | Nael, M.T. | Ahmad, Saeed

Affiliations: Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia | Microbiology Laboratory, Department of Botany, Mysore University, Manasagangothri Mysore-570006, Karnataka, India | Department of Chemistry, University of Engineering and Technology, Lahore 54890, Pakistan

Note: [] Corresponding authors: Fax: +966 3 8604277; E-mails: miwazeer@kfupm.edu.sa, aisab@kfupm.edu.sa.

Abstract: Reactions of imidazolidine-2-thione (Imt), 1,3-diazinane-2-thione (Diaz) and 1,3-diazipane-2-thione (Diap) with Cd(SeCN)2 in acetonitrile resulted in the formation of 2:1 tetrahedral complexes. Both solid state and solution NMR, confirm the exocyclic thione atom to be the donor in all cases. 113Cd shielding tensors and anisotropies were calculated from the solid-state NMR spectra. Based on the solid NMR data, a distorted tetrahedral dispositions of ligands around cadmium is proposed for the Imt complex. However, when the Imt ligand is substituted with one or two R groups (where R=Me, Et or i-Pr) forming RImt or R2Imt, a five coordinate complex with polymeric structure [(RImt)Cd(SeCN)2]∞ or [(R2Imt)Cd(SeCN)2]∞ is observed. Antibacterial studies of some of the complexes were carried out.

Keywords: Cadmium(II) complexes, selenocyanate complexes, imidazolidine-2-thione, CP MAS NMR studies

DOI: 10.3233/SPE-2008-0359

Journal: Spectroscopy, vol. 22, no. 5, pp. 361-370, 2008