Edmund Kwiatkowski, Marek Kwiatkowski, Aleksandra Olechnowicz
1984
Citations
0
Influential Citations
31
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract New preparative possibilities of the monocondensation product of pentane-2,4-dione and 1,2-diaminoethane for the synthesis of unsymmetrical ligands and their deuterated derivatives are demonstrated. Using this compound several new unsymmetrical tetradentate ketoenamines, various 9, 10, 11 substituted 4-methyl-5,8-diazaundeca-3,9-diene-2,11-diones and their copper(II), nickel(II) and palladium(II) complexes were obtained. On the basis of the 1 H nmr studies the structure of ligands and complexes were established. An unexpected stereochemistry was observed for the product of the reaction of 1,1,1-trifluoro-4-phenylbutane-2,4-dione with the mono-condensation product of pentane-2,4-dione and 1,2-diaminoethane. Spectroscopic data for the metal complexes are consistent with their planar structure. Utilizing the double resonance technique, deuteration of ligands, lanthanide and solvent shift reagents the assignment of almost all the 1 H nmr resources of ligands and complexes was accomplished.