Synthesis, characterization, and crystal structure of a four-coordinate cobalt(II) compound incorporating bis(3,5-dimethylpyrazol-1-yl)methane and cyanate

ABSTRACT

A new mononuclear cobalt(II) compound [Co(dmpzm)(NCO)₂] (1) (where dmpzm = bis(3,5-dimethylpyrazol-1-yl)methane and NCO⁻ = cyanate) has been synthesized and characterized by different physicochemical methods. Crystal structure of the compound is established by single-crystal X-ray diffraction analysis, which reveals that central cobalt(II) adopts distorted tetrahedral geometry and is coordinated by two nitrogen atoms of a bis-chelating dmpzm ligand and nitrogen atoms of two monodentate cyanate ions. Crystal structure is further stabilized by intermolecular C–H···O interactions, generating one-dimensional chain structure. The electrochemical properties of the compound were studied by cyclic voltammetric method. Room temperature magnetic susceptibility measurements reveal the presence of high-spin cobalt(II) ion in 1.

KEYWORDS:

• Cobalt(II) compound
• crystal structure
• distorted tetrahedral geometry
• cyclic voltammetry
• magnetic studies

Funding

S. Shit gratefully acknowledges University Grants Commission, New Delhi, India, for financial assistance (Minor Research Project No. PSW-65/12–13 (ERO)).