Journal
DALTON TRANSACTIONS
Volume 49, Issue 26, Pages 9099-9117Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0dt01008a
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Funding
- CSIR
- Department of Science and Technology (DST), India [15DSTFLS002, RD/0115-DSTFLS80-004]
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The salt metathesis reaction of two equivalents of 8-lithioquinoline (C6H6NLi) with HgBr(2)afforded bis(quinoline-8-yl)mercury, [(C6H6N)(2)Hg]. Bis(quinoline-8-yl)mercury has been used for the synthesis of a series of heteronuclear complexes of the type [(C6H6N)(2)M center dot M ']center dot X-n(-)[M = Hg; {M ' = Cu, X-= ClO4; X = I; X-= CF3SO3}, {M ' = Ag, X-= ClO4; X-= CF3SO3; X-= BF4}, {M ' = Au, X-= CF3SO3}; {M ' = Pd, X-= CF3CO2}], [M = Pd; M ' = Pd, X-= CF3CO2;n= 2]. All the complexes were well characterized by multinuclear NMR (H-1,C-13,F-19,B-11,Hg-199) spectroscopic analysis. Their structures were determined by single crystal X-ray diffraction studies, which displayed the shortest Hg center dot center dot center dot M ' (M ' = Cu, Ag, Au, Pd) metallophilic interactions. The electronic properties of the molecular structures were determined by DFT calculations. ELF (Electron Localization Function) analysis provided the information about the localization of electrons between metal center dot center dot center dot metal bonds and dispersion of electron density around the metal ions. The AIM (Atoms in Molecule) analysis revealed the presence of electron density at the bond critical points (bcp) and the strengths of M center dot center dot center dot M ' [M = Hg, M ' = Cu, Ag, Au, Pd; M, M '=Pd] interactions. The NBO (Natural Bond Orbital) analysis was used to identify the donor-acceptor character of the orbitals involved in the bonding.
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