Synthesis, structure and magnetism of M(hfaC)(2) complexes with spin labelled amides

摘要

An effective method for the synthesis of 4,4,5,5-tetramethyl-3-oxide-1-oxyl-4,5-dihydro-2H-imidazole-2-carbonitrile (1) has been found. 4,4,5,5-Tetramethyl-3-oxide-1-oxyl-4,5-dihydro-1H-imidazole-2-carboxylic (8) and 4,4,5,5-tetramethyl-1-oxyl-4,5-dihydro-1H-imidazole-2-carboxylic (9) acid amides have been synthesized and structurally characterized using 1 as the starting compound. Reactions of Mn(hfaC)(2), Cu(hfaC)(2) and Co(hfac)(2) with 8 and 9 lead to heterospin compounds tending to form in solid bi- or tetranuclear complexes due to intermolecular H-bonding between the peripheral NH2 groups and the coordinated carbonyl oxygen atoms. (C) 2003 Elsevier Ltd. All rights reserved.