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Synthesis, characterization and anti‐microbial studies of cadmium(II) compounds containing 3,10‐C‐ meso ‐Me 8 [14]ane C . Crystal and molecular structure of cis ‐[CdL C (NO 3 )](NO 3 )
Author(s) -
Roy Tapashi G.,
Hazari Saroj K. S.,
Barua Kanak K.,
Anwar Nurul,
ZukermanSchpector Julio,
Tiekink Edward R. T.
Publication year - 2010
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1703
Subject(s) - chemistry , denticity , crystal structure , ligand (biochemistry) , supramolecular chemistry , octahedron , crystallography , octahedral molecular geometry , stereochemistry , hydrogen bond , molecule , organic chemistry , biochemistry , receptor
One isomeric ligand, L C , among three isomers of 3,10‐C‐ meso ‐3,5,7,7,10,12,14,14‐octamethyl‐1,4,8,11‐tetraazacyclotet‐radecanes (L A , L B and L C , differing in the orientation of methyl groups on the chiral carbon atoms), on reaction with Cd(NO 3 ) 2 , CdCl 2 and CdI 2 produces octahedral cis ‐mononitrato nitrate, trans ‐dichloro and trans ‐diiodo cadmium(II) compounds of formulae cis ‐[CdL C (NO 3 )](NO 3 ), trans ‐[CdL C Cl 2 ] and trans ‐[CdL C I 2 ], respectively. The cis octahedral compound undergoes substitution reactions with KSCN, NaClO 4 and KBr to form the trans ‐substitution products, trans ‐[CdL C (NCS) 2 ], trans ‐[CdL C (ClO 4 ) 2 ] and trans ‐[CdL C Br 2 ], respectively, whereby the bidentate NO 3 − ligand is replaced by two monodentate ligands that occupy axial positions. All compounds were characterized on the basis of analytical, spectroscopic, conductometric and magnetochemical data. The crystal structure of cis ‐CdL C (NO 3 )](NO 3 ) was determined by X‐ray crystallography and showed the cadmium centre to exist within a cis ‐N 4 O 2 donor set that defined a distorted octahedral geometry. Non‐systematic variations in the CdO and CdN bond distances were correlated with significant hydrogen bonding interactions operating in the crystal structure. The latter interactions led to the formation of supramolecular two‐dimensional arrays. The anti‐fungal and anti‐bacterial activities of these compounds were studied against some phytopathogenic fungi and bacteria. Coordination of L C by cadmium resulted in more effective anti‐microbial agents; no significant dependence upon the nature of the counter‐ion was detected. Copyright © 2010 John Wiley & Sons, Ltd.