ABSTRACT

Effects of structural isomerism on solution behaviour of dihydroxybenzenes were examined through the determination of volumetric properties such as apparent molar volumes, apparent molar isentropic compressions, and isobaric expansions. The isomers were 1,2-dihydroxybenzene (catechol), 1,3-dihydroxybenzene (resorcinol), and 1,4-dihydroxybenzene (hydroquinone). The volumetric properties were determined from accurate density and speed of sound measurements at T = (283.15, 293.15, 298.15, 303.15, and 313.15) K and at various concentrations. Values at infinite dilution of these parameters were obtained by suitable extrapolation procedures. The results are discussed in terms of hydrophobic, hydrogen bonding, and dipole dipole interactions between the three isomers and water. Catechol was found to have the strongest hydrophilic and the weakest hydrophobic interactions with water among the three isomers.

Compounds

#	Formula	Name
1	C6H6O2	1,2-benzenediol
2	C6H6O2	1,3-benzenediol
3	C6H6O2	1,4-benzenediol
4	H2O	water

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1 4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	40
POMD	1 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	40
POMD	2 4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 2; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	35
POMD	2 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 2; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	35
POMD	3 4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 3; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	35
POMD	3 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	35

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Effects of structural isomerism on solution behaviour of solutes: Apparent molar volumes and isentropic compression of catechol, resorcinal, and hydroquinone in aqueous solution at T = (283.15, 293.15, 298.15, 303.15, and 313.15) K

Bayram, E.[Edip], Ayrancil, E.[Erol]

ABSTRACT