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• W2047337222 abstract "In this work, structures, and properties of Cu(2+) and CuCl(+) hydrates in the gas and aqueous phases have been investigated using the B3LYP method. Contact ion pair (CIP) and solvent-shared ion pair (SSIP) were both taken into account for CuCl(+) hydrates. Our calculations show that [Cu(H(2)O)(n)](2+) clusters favor a very open four-coordinated structure for n = 5-12 in the gas phase, while a five-coordinated conformer is favored for n > or = 8 in the aqueous phase. An approximate complete solvation shell of Cu(2+) in the aqueous phase needs more than 12 water molecules, while that of CuCl(+) in the aqueous phase needs only about eight water molecules. For [CuCl(H(2)O)(n)](+) clusters, the most stable structure is a four-coordinated CIP conformer for n = 4-7 in the gas phase and a five-coordinated CIP conformer for n = 8-10 in the aqueous phase. However, the five-coordinated CIP/h conformer (CIP conformer that the axial chloride atom tends to dissociate) of [CuCl(H(2)O)(n)](+) clusters becomes more favorable as n increases to 11. As the hydration process proceeds, the charges on the copper atom of [Cu(H(2)O)(n)](2+) clusters decrease, while those of [CuCl(H(2)O)(n)](+) clusters increase (probably due to the dissociation of Cl(-)). The d-d electron transition and partial charge transition band around 160 nm of the five-coordinated conformer of [Cu(H(2)O)(n)](2+) clusters and those bands (approximately 170 and approximately 160 nm) of SSIP or five-coordinated CIP/h conformers of [CuCl(H(2)O)(n)](+) clusters are coincident with the absorption of [Cu](2+)(aq) species (approximately 180 nm) resolved from the spectra obtained in trace CuCl(2) (ca. 10(-5) mol x kg(-1)) + LiCl (0-18 mol x kg(-1)) aqueous solution, while those of five-coordinated CIP conformers of [CuCl(H(2)O)(n)](+) clusters (n = 8 and 9) around 261 and 247 nm correspond to the absorption of [CuCl](+)(aq) species (approximately 250 nm). Our calculated electronic spectra indicate that the typical peak of copper(II)-chloride complexes changes from 180 to 250 nm, and 275 nm, as the process of Cl(-) coordination. For [Cu](2+)(aq), [CuCl](+)(aq), and [CuCl(2)](0)(aq) species, the central Cu(II) atom prefers five-coordination." @default.
• W2047337222 created "2016-06-24" @default.
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• W2047337222 creator A5027067861 @default.
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• W2047337222 date "2010-07-22" @default.
• W2047337222 modified "2023-10-13" @default.
• W2047337222 title "Hydrates of Cu²⁺ and CuCl⁺ in Dilute Aqueous Solution: A Density Functional Theory and Polarized Continuum Model Investigation" @default.
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• W2047337222 doi "https://doi.org/10.1021/jp1000804" @default.
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