Syntheses, structure, and magnetic properties of heteronuclear Cu(ii) 4Fe(iii)4 cluster and Cu(ii)8 bimetallacycles

Kong Qiu Hu, Shu Qi Wu, Guang Yu An, Ai Li Cui, Hui Zhong Kou

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The compartmental Schiff base ligands N,N′-ethylenebis(3- hydroxysalicylidene) (H4L) and N,N′-propylenebis(3- hydroxysalicylidene) (H4L′) have been employed in the synthesis of a cyclic tetranuclear Cu(ii) complex [Cu4(L′) 2(MeOH)3(H2O)]·[Cu4(L′) 2(MeOH)3] (1), a novel octanuclear Cu(ii) complex [Cu 8(L-L)2(H2O)42- H2O)]·3DMF·3H2O (2) and a hetero-octanuclear Cu(ii)-Fe(iii) complex [Cu4Fe4(L)4(H 2O)33-O)2] ·3DMF·3H2O (3). During the formation of the Cu 8 complex (2), a new bis-Schiff base ligand (L-L)8- forms via the ortho-para C-C coupling of two H4L ligands. The bicyclic complex (2) is comprised of two cyclic Cu4 units that are similar to that of complex 1. In the Cu4 unit, the alternate Cu(ii) ions are singly bridged by phenoxo groups. The three complexes display overall antiferromagnetic coupling, and the Cu(ii)-Cu(ii) magnetic coupling constant falls in the range -117.2 to -473.6 cm-1 for complexes 1 and 2 corresponding to the bridging Cu-Ophenoxide-Cu bond angles of 124.3-131.0°.

Original languageEnglish
Pages (from-to)1102-1108
Number of pages7
JournalDalton Transactions
Volume42
Issue number4
DOIs
Publication statusPublished - Jan 28 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

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