Metal-dependent formation of mononuclear complexes and M2L2 mesocates with Schiff-base ligands

Fielden, John ORCID: https://orcid.org/0000-0001-5963-7792, Long, De-Liang, Evans, Cameron and Cronin, Leroy (2006) Metal-dependent formation of mononuclear complexes and M2L2 mesocates with Schiff-base ligands. European Journal of Inorganic Chemistry, 2006 (19). pp. 3930-3935. ISSN 1434-1948

Full text not available from this repository. (Request a copy)

Abstract

The coordination chemistry of the tetradentate pyridylN-donor ligands r-1-hydroxy-t-3,t-5-bis{[(2-pyridinyl)methylene]amino}cyclohexane (DDOP) and r-1-hydroxy-t-3,t-5-bis{[(E)-(6-methyl-2-pyridinyl)methylene]amino}cyclohexane(DDMOP) has been investigated with the d10 metal centres silver(I) and cadmium(II). These conformationally flexible ligands offer two coordination modes; either a mononucleating tetradentate coordination pocket or a bridging bis(bidentate) chelate. Hence, reaction with CdII produced six-coordinate mononuclear complexes whose compositions were determined by X-ray crystallography as [Cd(DDOP)(NO3)2] (1) and [Cd(DDMOP)(Cl)2]·MeOH (2), while AgI led to the four-coordinate dinuclear mesocate structures [{Ag(DDOP)}2](CF3SO3)2 (3) and [{Ag(DDMOP)}2](CF3SO3)2·0.5MeOH (4). It is thought that the mononuclear, octahedral complexes in the case of zinc(II) and cadmium(II) result from the energetic stabilisation gained through two extra coordinate bonds, while in the case of silver(I) the lower propensity of the metal centre for six-coordination causes the ligand to retain its energetically preferred dinucleating conformation and to form the mesocates.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Chemistry
UEA Research Groups:	Faculty of Science > Research Groups > Chemistry of Materials and Catalysis Faculty of Science > Research Groups > Chemistry of Light and Energy Faculty of Science > Research Groups > Energy Materials Laboratory
Depositing User:	Users 2731 not found.
Date Deposited:	17 Oct 2012 11:21
Last Modified:	28 May 2024 14:30
URI:	https://ueaeprints.uea.ac.uk/id/eprint/39959
DOI:	10.1002/ejic.200600367

Actions (login required)

View Item