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COMPUTATIONAL AND THEORETICAL CHEMISTRY
Volume 1220, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.comptc.2023.114021
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The binary complexes formed between electron donors (ammonia, water, hydrogen fluoride, phosphine, hydrogen sulphide, and hydrogen chloride) and electron acceptors (methane and tetra-fluoromethane) were studied using ab initio molecular orbital theory. The properties investigated include molecular structures, interaction energies, vibrational spectra, and the formation of complexes through the interactions between molecular orbitals. The complexes were found to belong to various structural types depending on the combination of donor and acceptor, such as tetrel-bonded, hydrogen-bonded, halogen-bonded, pnicogen-bonded, and chalcogen-bonded. Regardless of the interaction type, the complexes were uniformly weakly bound. These results were explained in terms of donor properties and compared with previous studies on fluorine-substituted molecules.
The binary complexes of ammonia, water, hydrogen fluoride, phosphine, hydrogen sulphide and hydrogen chloride, as electron donors, with methane and tetra-fluoromethane, as electron acceptors, have been studied by means of ab initio molecular orbital theory. The properties of interest are the molecular structures, interaction energies and vibrational spectra of the complexes, and the interactions of the molecular orbitals which result in the formation of the complexes. The adducts were found to fall into a number of structural types, including tetrel-bonded, hydrogen-bonded, halogen-bonded, pnicogen-bonded and chalcogen-bonded, depending on the particular combination of electron donor and acceptor. The complexes, irrespective of the type of interaction, were found to be uniformly very weakly bound. The results have been rationalized in terms of the properties of the donors and, together with the conclusions of previous studies involving methyl fluoride, difluoromethane and fluoroform, with the extent of fluorine substitution in the parent molecule, methane.
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