Template synthesis of macrocyclic dinuclear CuII complexes and conversion into mononuclear complexes by site-selective copper elimination

A. Hori, M. Yonemura, M. Ohba, H. Okawa

研究成果: Article査読

25 被引用数 (Scopus)

抄録

The acyclic dinucleating ligand, N,N′-dimethyl-N,N′-trimethylenedi-(3-formyl-2-hydroxy-5- methylbenzylamine) (H2L), has been prepared. It combines two CuII ions with its N(amine)2O2 and O4 metal-binding sites to form a dinuclear complex [Cu2(L)](ClO4)2. The [1:1] condensation of [Cu2(L)](ClO4)2 with an aliphatic or aromatic diamine has provided macrocyclic dinuclear CuII complexes [Cu2(Li)](ClO4)2 (Li = L1 for the diamine = ethylenediamine, L2 for trimethylenediamine, L3 for tetramethylenediamine, L4 for o-phenylenediamine and L5 for 1,8-diaminonaphthalene). X-ray crystallographic studies for [Cu2(L1)(H2O)](ClO4) 2MeCN and [Cu2(L5)](ClO4)22MeOH demonstrate a macrocyclic dinuclear core structure with the two CuII ions in the N(amine)2O2 and N(imine)2O2 sites, in the Cu-Cu separation of ca. 3.0 Å. The dinuclear complexes are studied in magnetic, electronic spectral and electrochemical properties. The treatment of the dinuclear complexes with Na2S in acetonitrile resulted in the elimination of one Cu to afford the mononuclear complexes [Cu(Li)]xNaClO4. The X-ray crystallography for [Cu(L2)], [Cu(L3)NaClO4 and [Cu(L4)] has demonstrated that the Cu in the N(amine)2O2 site is selectively eliminated. In the latter complex, the Na1ion is accommodated in the aminic site.

本文言語English
ページ(範囲)495-503
ページ数9
ジャーナルBulletin of the Chemical Society of Japan
74
3
DOI
出版ステータスPublished - 2001 3月 1
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)

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