Syntheses, structures, and magnetic properties of terephthalato bridged dinuclear copper(II) and manganese(II) complexes with a tetradentate N-donor Schiff base

Somnath Choubey, Subhasis Roy, Kishalay Bhar, Rajarshi Ghosh, Partha Mitra, Chia Her Lin, Joan Ribas*, Barindra Kumar Ghosh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Three dinuclear compounds of the types [Cu2(L) 2(μ-tp)](ClO4/PF6)2 (1/2) and [Mn2(L)2(μ-tp)](ClO4)2 H 2O (3) [L = N,N′-(bis-(pyridin-2-yl)benzylidene)-1,3- propanediamine and tp = terephthalate dianion] have been synthesized and characterized. Structures of 1-3 are solved using single crystal X-ray diffraction measurements. The structural analyses show bis(monodentate) in 1/2 and bis(bidentate) in 3 of terephthalate bridging motifs resulting dicationic dinuclear unit [M2(L)2(μ-tp)]2+ [M = Cu (1/2) and Mn (3)]. Each metal center adopts distorted trigonal bipyramidal geometry in 1/2 and a distorted octahedral geometry in 3 with MN4O and MN4O2 chromophores, respectively. Chelation by the tetradentate Schiff base along with bis(monodentate) and bis(bidentate) bridging of terephthalate complete pentacoordination around each copper(II) center in 1/2 and hexacoordination around each manganese(II) center in 3, respectively. Variable-temperature magnetic susceptibility measurements of 1-3 in the 2-300 K temperature range reveal weak antiferromagnetic interaction presumably due to long bridging arm.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalPolyhedron
Volume55
DOIs
Publication statusPublished - 2013 May 17
Externally publishedYes

Keywords

  • Copper(II)/manganese(II) complex
  • Crystal structure
  • Magnetic behavior
  • Schiff base
  • Terephthalate bridge

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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