Synthesis, crystal structures, and magnetic properties of cyano-bridged honeycomblike layers MV-CuII (M = Mo, W) chelated by a macrocyclic ligand

Hak Lim Jeong, Sung Kang Jun, Chan Kim Hyoung, Kwan Koh Eui, Chang Seop Hong

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Abstract

Two cyano-bridged CuII-MV [M = Mo (2), W (3)] complexes formed by self-assembly of octacyanometalates [M(CN)8] 3- (M = Mo, W) with a new molecular precursor [Cu(L2)]2+ (1) (L2 = a macrocyclic ligand) in a 2:3 ratio have been investigated in terms of structures and magnetic behaviors. The M2Cu3 repeating unit of both bimetallic compounds is extended to a two-dimensional honeycomblike layered structure. The pendant ethyl groups on L2 noticeably influence the structural parameters around the Cu center. Compared with the system composed of a macrocycle without a side group, Cu-Nax (ax = axial) distances become shorter and the Cu-Nax-Cax angles are more bent for 2 and 3. The magnetic data denote that the Cu(II) and M(V) spins undergo explicit ferromagnetic interactions via CN bridges. From a structural and magnetic point of view, given that the Cu-Nax bond length in the tetragonally distorted octahedral Cu(II) environment is long enough, the overall ferromagnetic character remains despite the variation of Cu-N ax-Cax angle in this system.

Original languageEnglish
Pages (from-to)7821-7827
Number of pages7
JournalInorganic Chemistry
Volume45
Issue number19
DOIs
Publication statusPublished - 2006 Sep 18

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ASJC Scopus subject areas

  • Inorganic Chemistry

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