Synthesis,characterisation and crystal structures of three trinuclear cadmium(II) complexes with multidentate Schiff base ligands |
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| Authors: | Joy Chakraborty Santarupa Thakurta Brajagopal Samanta Aurkie Ray G Pilet Stuart R Batten Paul Jensen Samiran Mitra |
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| Institution: | 1. Department of Chemistry, Jadavpur University, Raja S.C. Mullick Road, Kolkata 700 032, India;2. Groupe de Cristallographie et Ingénierie Moléculaire, Laboratoire des Multimatériaux et Interfaces UMR 5615 CNRS – Université Claude Bernard Lyon 1, Bât. Jules Raulin, 43 bd du 11 Novembre, 1918 69622 Villeurbanne, Cedex, France;3. School of Chemistry, Monash University, P.O. Box 23, 3800 Victoria, Australia |
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| Abstract: | Three novel Schiff base Cd(II) trimeric complexes, Cd3(L1)2(SCN)2(CF3COO)2] (1), Cd3(L1)2(SCN)2(HCONMe2)] (2) and Cd3(L2)2{N(CN)2}2] (3) have been prepared from two different symmetrical Schiff bases H2L1 and H2L2 (where H2L1 = N1,N3-bis(salicylideneimino)diethylenetriamine, a potentially pentadentate Schiff base with a N3O2 donor set, and H2L2 = N1,N3-bis(3-methoxysalicylideneimino)diethylenetriamine, a potentially heptadentate Schiff base with a N3O4 donor set). All the complexes have been synthesised under similar synthetic procedures and their crystal structures have been established by single crystal X-ray diffraction methods. The ligands and their metal complexes have been characterised by analytical and spectroscopic techniques. Among the three complexes, 1 and 3 are linear whereas 2 is a cyclic trimer. In 1 and 3, all the doubly phenoxo bridged Cd(II) metal centres are in a distorted octahedral environment. In complex 2, two of the three Cd(II) centres reside in a distorted octahedral environment and the remaining one enjoys a monocapped octahedral geometry. Altogether the variety in the bridging mode of two new salen-type ligands has been established through these complexes. |
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| Keywords: | Cadmium(II) Trimer Schiff base X-ray structure Luminescence |
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