• Subhasish Kundu

      Articles written in Journal of Chemical Sciences

    • Synthesis, molecular and crystalline architectures, and properties of a mononuclear complex [CoII (benzidine)2(NCS)2(OH2)2]

      Subhasish Kundu Subhasis Roy Kishalay Bhar Rajarshi Ghosh Chia-Her Lin Joan Ribas Barindra Kumar Ghosh

      More Details Abstract Fulltext PDF

      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 = $1.19 \times 10^{−4}$.

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