Ursula Sheridan, J. McGinley, J. Gallagher
Aug 1, 2013
Citations
0
Influential Citations
10
Citations
Journal
Polyhedron
Abstract
The reaction of 2-(2 H -tetrazol-5-yl)pyridine ( L1 ) with 1, n -dibromoalkane ( n = 3, 4, 6 or 8) results in the formation of the isomers 2-( n ″-bromoalkyl-(1-tetrazol-5-yl)pyridine ( L2A-D ) and 2-( n ″-bromoalkyl-(2-tetrazol-5-yl)pyridine ( L3A-D ). The reaction of L1 with 1-bromoalkanes also resulted in the formation of isomeric materials, namely 2-( n ″-alkyl-(1-tetrazol-5-yl)pyridine ( L4A-C ) and 2-( n ″-alkyl-(2-tetrazol-5-yl)pyridine ( L5A-C ). Complexation reactions of these ligands with the transition metal salts CuCl 2 ·2H 2 O, Co(NCS) 2 , NiCl 2 ·2H 2 O and ZnCl 2 were carried out in methanol and resulted in complexes containing a 1:1 metal:ligand stoichiometry except in the cases of the cobalt complexes where a 1:2 metal:ligand stoichiometry was obtained. The 1 H NMR spectra of the zinc complexes showed that the ligands containing the pendant arm in the 2-N position of the tetrazole ring bind the zinc ion more strongly than those containing the pendant arm in the 1-N position. The X-ray structures of two cobalt salts, Co( L5A ) 2 (NCS) 2 and Co( L5C ) 2 (NCS) 2 , are also discussed.