Copper(II), nickel(II) and cobalt(III) complexes of the macrocyclic ligand C-meso-7,14-diphenyl-5,6-butano-12,13-butano-1,4,8,11-tetraazacyclotetradeca-4,11-diene |
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Authors: | Robert W Hay Bakir Jeragh Dharam P Piplani Kalman Hideg Olga H Hankovszky |
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Institution: | (1) Chemistry Department, University of Stirling, FK9 4LA Stirling, Scotland, UK;(2) Central Laboratory of Chemistry, University of Pécs, P.O. Box 99, 7643 Pécs, Hungary |
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Abstract: | Summary Metal complexes of the macrocyclic tetraaza ligand C-meso-7,14-diphenyl-5,6-butano-12,13-butano-1,4,8,11-tetraazacyclotetradeca-4,11-diene (L) are described. The copper(II) and nickel(II) complexes, isolated as their perchlorate salts, are 4-coordinate species. Several cobalt(III) complexes,trans-CoLX2]+(X = Cl–, Br–, NO
2
–
or N
3
–
have also been characterised. The most probable stereochemistry of the ligand in the metal complexes is the C-meso-N-meso arrangements of the chiral centres. The N-meso stereochemistry leads to the bulky phenyl groups lying in equatorial positions. I.r. and d-d spectra are reported for the various complexes described. |
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