Exchange interactions in the copper(II)-N-benzoylglycine (hippuric acid) complex

Autor(es)

Vieira, Ernanni D. ^[1] ; Facchin, Gianella ^[2] ; Torre, Maria H. ^[2] ; Costa-Filho, Antonio J. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Fis & Informat, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Republica, Catedra Quim Inorgan, Montevideo - Uruguay

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 19, n. 8, p. 1614-1621, 2008.
• Citações Web of Science: 6

Resumo

The complex CuII-N-benzoylglycine provides a convenient system to study weak exchange interactions between unpaired spins transmitted through a biologically relevant long chemical bridge. The molecule exists as a dimer with each CuII ion coordinated to five ligands, forming a distorted square-based pyramid. The only chemical connection between magnetically non-equivalent copper ions is a very long path comprising 17 diamagnetic atoms and a weak putative hydrogen bond. This interaction was studied using Electron Paramagnetic Resonance in single-crystal samples at 9.5 and 34.5 GHz and its magnitude was calculated as 4(1) mK. This value is discussed in terms of values obtained for similar paths in other model compounds and in proteins. (AU)

• Processo FAPESP: 03/09859-2 - Ressonância paramagnética eletrônica em estudos estruturais de proteínas, peptídeos, biomembranas, polímeros, moléculas modelo e seus complexos com metais de transição
• Beneficiário: Otaciro Rangel Nascimento
• Modalidade de apoio: Auxílio à Pesquisa - Programa PRONEX - Temático