title: Co-ordination behaviour of a novel tristhiourea tripodal ligand; structural variations in a series of transition metal complexes.
abstract: The co-ordination chemistry of a tristhiourea tris(2-pyridylmethyl)amine ligand () with a series of transition metal ions has been investigated. Crystallographic data show that large metal ions, with no geometrical preferences, such as Mn(ii) and Cd(ii), will form seven co-ordinate monocapped octahedral complexes, while smaller metal ions such as Zn(ii) favour five co-ordinate trigonal bipyramidal structures. In a similar manner to the related bisthiourea complexes, the Ni(ii) complex shows a strong preference for octahedral geometries resulting in the ligand binding asymmetrically. Spectroscopic (IR and NMR), spectrometric (MS) as well as electrochemical data for these complexes are reported.
authors.affiliation: Umm Al-Qura University, Kingdom of Saudi Arabia. fasaad@uqu.edu.sa and School of Chemistry, Cardiff University, Cardiff, UK. amorosoaj@cf.ac.uk.
authors.forename: Fawaz A
authors.initials: FA
authors.lastname: Saad
authors.affiliation: School of Chemistry, Cardiff University, Cardiff, UK. amorosoaj@cf.ac.uk.
authors.forename: James C
authors.initials: JC
authors.lastname: Knight
authors.affiliation: School of Chemistry, Cardiff University, Cardiff, UK. amorosoaj@cf.ac.uk.
authors.forename: Benson M
authors.initials: BM
authors.lastname: Kariuki
authors.affiliation: School of Chemistry, Cardiff University, Cardiff, UK. amorosoaj@cf.ac.uk.
authors.forename: Angelo J
authors.initials: AJ
authors.lastname: Amoroso