ABSTRACT

Densities of N,N'-1,2-ethyl-bis(salicyladimine) Schiff base (salen) in dimethylsulfoxide (DMSO), N,N-dimethylformamide (DMF), N,N-dimethylacetamide (DMA), dichloromethane (CH2Cl2), and chloroform (CHCl3) binary mixtures have been measured in dilute concentration regions of salen at T = (283.15 to 318.15) K under ambient pressure. Apparent molar volumes, V, and standard partial molar volumes, V0, have been calculated from the measured densities. The V0 values in DMSO have larger values corresponding to the high polarity of this solvent. The results show that their values would be increased slightly with an increase in temperature. The partial molar expansivities, E0, and the isobaric thermal expansion coefficients, a*, have been calculated from the temperature dependence of V0 values. The Hepler s constant values, (?2V0/?T2)p, were found to be positive or very small and negative which indicate that salen Schiff base is predominately a structure maker in all organic solvents studied.

Compounds

#	Formula	Name
1	C2H6OS	dimethyl sulfoxide
2	C4H9NO	N,N-dimethylethanamide
3	C3H7NO	dimethylformamide
4	CHCl3	trichloromethane
5	CH2Cl2	dichloromethane
6	C16H16N2O2	2,2'-[ethylenebis(nitrilomethylidyne)]diphenol

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	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	4
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:2	4
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	4
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	4
POMD	3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	4
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	4
POMD	4	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	4
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:4	4
POMD	5	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	4
POMD	5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:2	4
POMD	6 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	36
POMD	1 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	40
POMD	3 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	36
POMD	5 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:4	36
POMD	4 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:4	36

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Partial Molar Volumes of N,N'-1,2-Ethyl-bis(salicyladimine) Schiff Base (Salen) in Organic Solvents at T = (283.15 to 318.15) K

Shekaari, H.[Hemayat], Bezaatpour, A.[Abolfazl], Soltanpour, A.[Ayyob]

ABSTRACT