Crystal structures and magnetic properties of binuclear copper(II) complexes with alkoxo and benzoato or silanecarboxylato bridges

Takashi Kawata, Michinari Yamanaka, Shigeru Ohba, Yuzo Nishida, Megumi Nagamatsu, Tadashi Tokii, Michinobu Kato, Omar W. Steward

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

The crystal structures of the binuclear copper(II) complexes [Cu2(L-ac)(PhCOO)] (1), [Cu2(L-ac)(2-Me-PhCOO)· 1/2MeOH (2), [Cu2(L-ac)(2,6-Me2-PhCOO)] (3), [Cu2(L-ac)(2,6-Cl2-PhCOO)] · 0.7DMF (4), and [Cu2(L-ac)(Ph2MeSiCOO)] (5) were determined by X-ray diffraction. The ligand H3(L-ac) is a 1:2 Schiff base derived from 1,3-diaminopropan-2-ol and acetylacetone. These complexes are antiferromagnetic and their -2J values are (1) 183, (2) 188, (3) 133, (4) 207, and (5) 95 cm-1, respectively. A rough positive correlation between the Cu ⋯ Cu distance and the -2Jvalue was observed except for 5. The smaller -2Jvalue of the triorganosilanecar-boxylato complex, 5, than the benzoato complexes, 1-4, indicates a stronger orbital countercomplementary effect in 5. The geometrical parameters in the benzoato bridge have a minor effect on the magnitude of the antiferromagnetic interaction.

Original languageEnglish
Pages (from-to)2739-2747
Number of pages9
JournalBulletin of the Chemical Society of Japan
Volume65
Issue number10
DOIs
Publication statusPublished - 1992 Oct 1

ASJC Scopus subject areas

  • Chemistry(all)

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