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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/125/04/0723-0730

    • Keywords

       

      Cobalt(II); thiocyanate; benzidine; X-ray structure; magnetism.

    • Abstract

       

      One mononuclear cobalt(II) compound of the type [Co(bnzd)2(NCS)2(OH2)2] (1) (bnzd = benzidine) has been isolated through a single-pot reaction of the molecular building components in MeOH-H2O solvent mixture at room temperature and characterized by physico-chemical and spectroscopic methods. The crystal structure of complex 1 has an octahedral geometry with trans, trans, trans orientations in the order (N$^a$,N$^a$), (N$^t$,N$^t$), (O$^w$,O$^w$) [N$^a$ = N(amine), N$^t$ = N(thiocyanate) and O$^w$ = O(water)]. In crystalline state, individual units of 1 are associated by weak cooperative O-H…N, O-H…S and N-H…S hydrogen bonds resulting in a 3D network structure. The compound is redox active and shows luminescence in MeOH solution. Thermal decomposition pattern of 1 reveals the presence of two coordinated water molecules. Variabletemperature magnetic susceptibility measurement shows significant orbital contribution and numerical matrix diagonalization method gives the best fit parameters: 𝛼 = Ak = 1.43; 𝜆 = −130 cm-1; 𝛥 = −864 cm-1; TIP = 0.000975; R = $1.19 \times 10^{−4}$.

    • Author Affiliations

       

      Subhasish Kundu1 Subhasis Roy1 Kishalay Bhar1 Rajarshi Ghosh1 Chia-Her Lin2 Joan Ribas3 Barindra Kumar Ghosh1

      1. Department of Chemistry, The University of Burdwan, Burdwan 713 104, India
      2. Depatrment of Chemistry, Chung Yuan Christian University, Chung Li, Taiwan 32023, ROC
      3. Departament de Química Inorgánica, Universitat de Barcelona, Diagonal, 647; 08028 Barcelona, Spain
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    • Supplementary Material

       
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