Tetranuclear mixed-valence Co(II/III) and binuclear Ni(II) complexes incorporating hydroxyl-rich ligand: Syntheses, structures and magnetic properties

Su Yun Zhang, Bin Xu, Lina Zheng, Wenqian Chen, Yahong Li, Wu Li

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Three complexes of composition [Co2IICo 2III(H2hbhpd)2(H4hbhpd) 2(H2O)2]Cl2(CH3OH) 4 (1), [Co2IICo2 III(H2hbhpd)2(H4hbhpd) 2(H2O)2](NO3)2(CH 3OH)4 (2) and [Ni2(H4hbhpd) 2(NO3)](NO3)(CH3OH)1.5 (3) (H5hbhpd = 2-(2-hydroxy-benzylamino)-2-hydroxymethyl-propane-1,3- diol) have been synthesized and their structures have been characterized. Complexes 1 and 2 are mixed-valence cobalt clusters and display face-sharing monovacant dicubane structures. In the complexes 1 and 2, one of the three alkyl hydroxyl groups of H5hbhpd ligand is deprotonated instead of deprotonation of phenyl hydroxyl group; thus monoanionic H4hbhpd - ligand displays novel η3, η1, η1, μ3 coordination mode. Complex 3 is binuclear, and the two metal centers of 3 are bridged by two deprotonated phenyl hydroxyl oxygen atoms and iso-orthogonalized by a nitrato group in η1η 1-O,O′ coordination fashion. Variable-temperature solid-state dc magnetization studies have been performed in the temperature range 2-300 K for compounds 1 and 3. Antiferromagnetic interactions were determined for 1 and ferromagnetic couplings were found for 3.

Original languageEnglish
Pages (from-to)44-50
Number of pages7
JournalInorganica Chimica Acta
Volume367
Issue number1
DOIs
Publication statusPublished - 2011 Feb 28

Keywords

  • Binuclear complex
  • Coordination mode
  • Magnetic properties
  • Mixed-valence
  • Tetranuclear clusters

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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