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- W2069256257 abstract "The basicity of water in nitromethane (NM), propane-1,2-diyl carbonate (PDC) and acetone (AC) has been examined using spectral data for (1R,4S,8R,11S)-1,4,8,11-tetramethyl-1,4,8,11-tetra-azacyclotetradecane-nickel(II){[Ni(TMC)]2+}. In these solvents water monomers are in equilibrium with their dimers: the water monomers are only weakly coordinated to the chelate in these solvents, whereas the dimers are more strongly coordinated. The equilibrium constant KNi,w=[Ni(TMC){(H2O)2}2+]/[Ni(TMC)2+][(H2O)2] where (H2O)2 is the water dimer, is 1.0 in NM, 1.8 in PDC and 5.0 in AC, showing that KNi,w increases with increasing electron-pair donicity of the bulk solvent molecules in the order NM < PDC < AC. These results emphasize that the basicity of water is strengthened by the polarization of O—H bonds due to dimerization or charge transfer through hydrogen bonding. The basicity of the dimer in each solvent has been evaluated using the relationship between the 1H chemical shift of water and the donor number of the aprotic solvent." @default.
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- W2069256257 date "1988-01-01" @default.
- W2069256257 modified "2023-09-27" @default.
- W2069256257 title "Basicity of water in organic solvents (nitromethane, propane-1,2-diyl carbonate and acetone) using the 1,4,8,11-tetramethyl-1,4,8,11-tetra-azacyclotetradecanenickel(II) cation as a probe of electron-pair acceptance" @default.
- W2069256257 doi "https://doi.org/10.1039/f19888401679" @default.
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