Syntheses,characterization and anti‐microbial activities of palladium(II) and palladium(IV) complexes of 3,10‐C‐meso‐Me8[14]diene (L1) and its reduced isomeric anes (LA,LB and LC). Crystal and molecular structure of [PdL1][Pd(SCN)4] |
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| Authors: | Tapashi G Roy Saroj K S Hazari Kanak K Barua Dong Il Kim Yu Chul Park Edward RT Tiekink |
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| Institution: | 1. Department of Chemistry, University of Chittagong, Chittagong 4331, Bangladesh;2. Department of Chemistry, Kyungpook National University, Daegu 702‐701, Korea;3. Department of Chemistry, University of Texas at San Antonio, TX 78249‐0698, USA |
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| Abstract: | The reactions of 3,10‐C‐meso‐3,5,7,7,10,12,14,14‐octamethyl‐1,4,8,11‐tetraazacyclotetradecadiene, L1, and two isomers (LB and LC, differing in the orientation of methyl groups on the chiral carbon atoms) of its reduced form with PdCl2 and K2Pd(SCN)4], produce square‐planar tetrachloro‐ and tetrathiocyano‐palladium(II) complexes of general formulae PdL′]PdCl4] and PdL′]Pd(SCN)4] (L′ = L1, LB and LC), respectively. By contrast, the third ane isomer, LA, upon reaction with the same reagents, PdCl2 and K2Pd(SCN)4], formed octahedral tetrachloro‐ and tetrathiocyanato‐palladium(IV) complexes PdLACl2]Cl2 and PdLA(SCN)2](SCN)2, respectively. The PdL′]PdCl4] and PdLACl2]Cl2 complexes undergo substitution reactions with KSCN to form square‐planar and octahedral tetrathiocyanato complexes PdL′]Pd(SCN)4] and PdLA(SCN)2](SCN)2, respectively. All complexes have been characterized on the basis of analytical, spectroscopic, conductometric and magnetochemical data. The anti‐fungal and anti‐bacterial activities of these complexes have been studied against some phytopathogenic fungi and bacteria. The crystal structure of PdL1]Pd(SCN)4] has been confirmed by X‐ray crystallography and shows with square‐planar PdN4 and PdS4 geometries monoclinic, space group C2/c, a = 17.884(3) Å, b = 14.734(2) Å, c = 11.4313(18) Å, β = 104.054(5)° ]. Copyright © 2008 John Wiley & Sons, Ltd. |
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| Keywords: | palladium(II) palladium(IV) tetraazacyclotetradecadiene tetraazacyclodecanes anti‐fungal activity anti‐bacterial activity crystal structure |
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