Co-ordination behaviour of a novel tristhiourea tripodal ligand; structural variations in a series of transition metal complexes. Issue 25 (31st May 2016)

• Record Type: Journal Article
• Authors: Saad, Fawaz A.; Knight, James C.; Kariuki, Benson M.; Amoroso, Angelo J.
• Is Part Of: Dalton transactions. Volume 45:Issue 25(2016)
• Page Start: 10280
• Page End: 10288
• Publication Date: 2016-05-31
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c6dt01148a
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : On coordination, L 1 may form a symmetrical array of hydrogen bond donors, suitable for the binding of anions. Mn(ii ) and Cd(ii ), form symmetrical monocapped octahedral complexes. However Zn(ii ) and Ni(ii ) favours asymmetric trigonal bipyramidal and octahedral structures respectively. Abstract : The co-ordination chemistry of a tristhiourea tris(2-pyridylmethyl)amine ligand (L 1 ) 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.