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

Reactions of Mn(hfac) 2, Cu(hfac) 2 and Co(hfac) 2 with amide derivatives of nitronyl and imino nitroxides lead to heterospin compounds tending to form in solids bi- or tetranuclear complexes due to intermolecular H-bonding between the peripheral NH 2 groups and the coordinated carbonyl oxygen atoms...

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Bibliographic Details
Published in:	Polyhedron Vol. 23; no. 5; pp. 763 - 772
Main Authors:	Tretyakov, Eugene V, Koreneva, Olga V, Romanenko, Galina V, Shvedenkov, Yu G, Ovcharenko, Victor I
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 04-03-2004
Subjects:	Amide Cobalt complexes Copper complexes Imino nitroxide Manganese complexes Nitronyl nitroxide Amide Imino nitroxide Nitronyl nitroxide Manganese complexes Copper complexes Cobalt complexes
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Summary:	Reactions of Mn(hfac) 2, Cu(hfac) 2 and Co(hfac) 2 with amide derivatives of nitronyl and imino nitroxides lead to heterospin compounds tending to form in solids bi- or tetranuclear complexes due to intermolecular H-bonding between the peripheral NH 2 groups and the coordinated carbonyl oxygen atoms. An effective method for the synthesis of 4,4,5,5-tetramethyl-3-oxide-1-oxyl-4,5-dihydro-1 H-imidazole-2-carbonitrile ( 1) has been found. 4,4,5,5-Tetramethyl-3-oxide-1-oxyl-4,5-dihydro-1 H-imidazole-2-carboxylic ( 8) and 4,4,5,5-tetramethyl-1-oxyl-4,5-dihydro-1 H-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 NH 2 groups and the coordinated carbonyl oxygen atoms.
ISSN:	0277-5387
DOI:	10.1016/j.poly.2003.11.054