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      https://www.ias.ac.in/article/fulltext/jcsc/126/06/1685-1694

    • Keywords

       

      Dinuclear manganese(II); N-donor schiff base; bis(bidentate) terephthalate bridge; anion$^{\cdots}\pi$ interaction; magnetic behaviour

    • Abstract

       

      A dinuclear compound [Mn2(L)2(𝜇-tp)](PF6)2·3.57H2O (1) [L = N,N′-(bis(pyridin-2-yl)benzylidene)-1,3-propanediamine and tp = terephthalate dianion] has been isolated and characterized on the basis of microanalytical, spectroscopic and other physicochemical properties. X-ray structural study showed interesting bis(bidentate) bridging motif of tp in the dicationic dinuclear unit [Mn2(𝜇-tp)]2+. Each manganese(II) centre adopts a rare distorted trigonal prismatic geometry with an MnN4O2 chromophore.Chelation of the tetradentate Schiff base (L) along with bis(bidentate) bridging of two O atoms of tp complete hexacoordination around each manganese(II) centre. The dinuclear units of 1 are associated through cooperative C-H$\cdots$F hydrogen bonds and $\pi^{\cdot} \pi$, C-H$^{\cdots} \pi$ and rare anion$^{\cdots} \pi$ interactions to promote the dimensionality in a graded manner. Variable temperature magnetic susceptibility measurement of 1 in the 2-300 K temperature range revealed weak antiferromagnetic interaction presumably due to long bridging arm of tp.

    • Author Affiliations

       

      Somnath Choubey1 Soumi Chattopadhayay1 Kishalay Bhar1 Subhasis Roy1 Sumitava Khan1 Joan Ribas2 Barindra Kumar Ghosh1

      1. Department of Chemistry, The University of Burdwan, Burdwan 713104, India
      2. Departament de Quimica Inorganica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
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