Synthesis, spectroscopic characterization, and antimicrobial activity of cobalt(II) complexes of acetone-N(4)-phenylsemicarbazone: crystal structure of [Co(HL)2(MeOH)2](NO3)2 |
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| Authors: | V L Siji M R Sudarsanakumar and S Suma |
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| Institution: | (1) Department of Chemistry, Mahatma Gandhi College, Thiruvananthapuram, Kerala, 695 004, India;(2) Department of Chemistry, S.N. College, Varkala, Kerala, 695 145, India; |
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| Abstract: | Four Co(II) complexes, Co(HL)2](OAc)2, Co(HL)2Cl2], Co(HL)2(MeOH)2](NO3)2, and Co2(HL)4(SO4)2] (HL = acetone-N(4)-phenylsemicarbazone) were synthesized and characterized by physicochemical and spectroscopic methods. The magnetic susceptibility
measurements indicate that the complexes are paramagnetic with three unpaired electrons. In all the complexes, the semicarbazone
is coordinated as a neutral bidentate ligand. The structure of Co(HL)2(MeOH)2](NO3)2 was confirmed by single crystal X-ray crystallography. The ligand is neutral and bidentate, being coordinated to the cobalt
atom through the carbonyl oxygen and the azomethine nitrogen. Intermolecular hydrogen bonding and C–H···π interactions combine
to stabilize the crystal structure. The ligand and its two complexes Co(HL)2Cl2] and Co(HL)2(MeOH)2](NO3)2 were screened for their antibacterial and antifungal activities using disk diffusion methods. |
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