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Synthesis, structure and theoretical studies of Hg(II)-NH carbene complex of annulated ligand pyridinyl[1,2-a]{2-pyridylimidazol}-3-ylidene hexaflurophosphate |
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| Authors: | Tapastaru Samanta Gourisankar Roymahapatra Partha Mitra Pratim Kumar Chattaraj |
| Institution: | a School of Applied Science, “Applied Synthetic Chemical Research Lab.”, Haldia Institute of Technology, Haldia 721657, Purba Medinipur, West Bengal, India b Department of Chemistry and Center for Theoretical Studies, Indian Institute of Technology Kharagpur, Kharagpur 721302, India c Department of Inorganic Chemistry, Indian Association for the Cultivation of Sciences, Jadavpur, Kolkata 700032, West Bengal, India d School of Chemistry, University of Hyderabad, Hyderabad 500046, India |
| Abstract: | Experimental and theoretical studies of a new class of novel annulated imidazolium scffords 2a, 2b, 2c and their Hg(II)-NHC complexes 3a, 3b and 3c have been synthesized and characterized by different spectroscopic techniques. Molecular structures of 3a and 3b have been determined by single crystal X-ray diffraction studies. Virtual linear geometry Ccarbene-Hg-Ccarbene 176.56(17)°] around Hg of the complex 3b is observed where as in 3a and 3c its deviate a more. DFT calculations provide geometrical parameters in conformity with the experimental values in case of 3a. The molecules prefer syn configuration over the anti due to lower energy supported by theoretical studies. Attention has given paid for theoretical calculations and comparison of 3a and 3c to observe the steric effect of -CH3 group in the scaffords where as in case of 3b the -CH3 group remain innocent. |
| Keywords: | Imidazolium salts Annulated ligand Hg-NH carbene DFT |
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