On the solubility of aliphatic hydrocarbons in 7 M aqueous urea

Article Abstract:

The solubility of aliphatic hydrocarbons in 7 M aqueous urea is accounted for based on the extension of the theory of hydrophobic hydration. It can be concluded that the work of cavity creation is always greater in 7 M aqueous urea than in water thus contrasting the transfer, whereas the solute-solvent Van der Waals interaction energy is always greater in magnitude in 7 M aqueous urea than in water, which favors the transfer.

Water chemistry, Hydrocarbons, Chemical properties

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Solvation thermodynamics of water in nonpolar organic solvents indicate the occurrence of nontraditional hydrogen bonds

Article Abstract:

The energetic interactions of water molecules with no polar liquids have to be stronger than predicted by considering only van der Waals contributions. The occurrence of nontraditional hydrogen bonds in an isotropic liquid phase between an inserted water molecule and the surrounding aliphatic or aromatic molecules emerged from the analysis of the solvation thermodynamics of water in nonpolar organic solvents.

Water, Hydrogen bonding, Hydrogen bonds, Thermal properties, Thermodynamics

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Comment on 'Do molecules as small as neopentane induce a hydrophobic response similar to that of large hydrophobic surfaces?'

Article Abstract:

The minimum size for which the hydrophobicity changes from entropic to energetic in character is not yet entirely defined. Experimental thermodynamic data indicate that the hydrophobicity of neopentane is qualitatively similar to that of small nonpolar solutes such as argon and methane and differs from that of large hydrophobic surfaces.

Industrial Organic Chemicals, Cyclic Crude and Intermediate Manufacturing, Pentanes, Analysis, Chemistry, Physical and theoretical, Physical chemistry, Hydrophobic effect, Pentane

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