Synthesis, molecular and crystalline architectures, and properties of a mononuclear complex [Co II (benzidine) 2 (NCS) 2 (OH 2 ) 2 ]

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


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 (Na,Na), (Nt,N t), (Ow,Ow) [Na = N(amine), N t = N(thiocyanate) and Ow = 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. Variable-temperature 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 × 10 - 4. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)723-730
Number of pages8
JournalJournal of Chemical Sciences
Issue number4
Publication statusPublished - 2013 Jul
Externally publishedYes


  • Cobalt(II)
  • X-ray structure
  • benzidine
  • magnetism
  • thiocyanate

ASJC Scopus subject areas

  • General Chemistry


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