Issue 9, 1990

Co-ordination of 6,13-dimethyl-1,4,8,11-tetra-azacyclotetradecane-6,13-diamine to platinum(II) and palladium(II). Syntheses, characterisation, and X-ray crystal structures of the perchlorate salts of both complexes

Abstract

Both platinum(II) and palladium(II) complexes of 6,13-dimethyl-1,4,8,11-tetra-azacyclotetradecane-6,1 3-diamine (L1) as a quadridentate ligand have been prepared in facile reactions as perchlorate salts, and characterised by electronic and n.m.r. spectroscopy, and voltammetry. The platinum(II) complex, [Pt(H2L1)][ClO4]4, represents the first structurally characterised with a saturated macrocyclic tetra-amine ligand. It crystallises in the triclinic space group P[1 with combining macron], with a= 10.006(4), b= 8.691 (3), c= 8.173(2)Å, α= 75.74(2), β= 79.00(3), and γ= 83.54(3)°, as does the complex [Pd(H2L1)][ClO4]4·6H2O, with a= 11.123(5), b= 8.609(5), c= 8.541 (3)Å, α= 91.27(4), β= 96.09(3), and γ= 98.20(4)°. The cell of the palladium complex is derivative of that of the platinum simply by expansion, albeit with variations in some individual parameters. The Pt–N distances [2.045(7) and 2.043(6)Å] and Pd–N distances [2.044(3) and 2.036(3)Å] are slightly shorter than in non-cyclic MIIN4 analogues.

Article information

Article type
Paper

J. Chem. Soc., Dalton Trans., 1990, 2853-2858

Co-ordination of 6,13-dimethyl-1,4,8,11-tetra-azacyclotetradecane-6,13-diamine to platinum(II) and palladium(II). Syntheses, characterisation, and X-ray crystal structures of the perchlorate salts of both complexes

P. V. Bernhardt, G. A. Lawrance, W. C. Patalinghug, B. W. Skelton, A. H. White, N. F. Curtis and A. Siriwardena, J. Chem. Soc., Dalton Trans., 1990, 2853 DOI: 10.1039/DT9900002853

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