Molecular and supramolecular structures of self-assembled Cu(II) and Co(II) complexes with 4,4’-[6-(3,5-dimethyl-1H-pyrazol-1-yl)-1,3,5-triazine-2,4-diyl]dimorpholine ligand
Soliman, Saied M.; Haukka, Matti; Al-Rasheed, Hessa H.; El-Faham, Ayman (2020). Molecular and supramolecular structures of self-assembled Cu(II) and Co(II) complexes with 4,4’-[6-(3,5-dimethyl-1H-pyrazol-1-yl)-1,3,5-triazine-2,4-diyl]dimorpholine ligand. Journal of Molecular Structure, 1219, 128584. DOI: 10.1016/j.molstruc.2020.128584
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The molecular and supramolecular structures of [Cu(PTM)Cl2]*0.75MeOH (1), [Co(PTM)Cl2]; (2A) and [Co(PTM)Cl2(EtOH)]; (2B) complexes, where PTM is 4,4’-[6-(3,5-dimethyl-1H-pyrazol-1-yl)-1,3,5-triazine-2,4-diyl]dimorpholine, were presented. In complexes 1 and 2A, the Cu(II) and Co(II) are tetra-coordinated with a distorted tetrahedral coordination environment. In case of complex 2B, an additional ethanol molecule is found coordinated with Co(II) leading to a highly distorted penta-coordinated Co(II) complex. In all cases, the PTM ligand is acting as a bidentate NN-chelate. Hirshfeld surface analysis indicated the importance of H⋯H (49.0–55.1%), Cl⋯H (18.8–20.5%) and O⋯H (8.3–9.9%) contacts in the molecular packing. The electron transferences from the ligand units to the central metal atom as well as the spin density distribution were discussed based on DFT calculations. The presence of coordinated ethanol molecule in 2B weakened the Co-N and Co-Cl interactions compared to 2A. Using atoms in molecules topology analysis, the coordinate bonds between metal (Co or Cu) and donor atoms (N, O, Cl) belong to closed shell interactions with weak covalent characters. ...
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Additional information about fundingThe authors would like to extend their sincere appreciation to the Deanship of Scientific Research at King Saud University for providing funding to the research group no. RG -1441-365, Saudi Arabia.
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