A Study of Molecular Interaction in Binary Mixtures of 1-Propanol with N,N-Dimethylformamide at Different Temperatures

Abstract

The static dielectric constant (ε0) and optical dielectric constant (ε = n2) of binary mixtures of 1-Propanol (1-PrOH) with N,N-Dimethylformamide (DMF) of different concentrations, prepared by volume fractions (0.0, 0.1, . 1.0) are measured at 2 MHz using precision LCR meter and Abbes refractometer respectively at different temperatures. The excess dielectric constant (ε0)E, Kirkwood correlation parameters (geff, gF), Bruggeman parameter (fB) are evaluated. The variations of these parameters with concentration and temperature are discussed in terms of molecular interaction between the molecular species of constituting components in these mixtures.

Study of Molecular Interaction in Binary Mixtures (1-Propanol + Acetophenone)

“…The deviation of g F values from unity confirms that the H-bonded structures of mixture constituents changes significantly. The extent of departure of g f from unity represents the degree of interaction [5,6,7]. Bruggeman parameter (f B ) gives information about the interaction between components in the mixture [11].…”

“…In recent years, measurements of static dielectric constant, refractive index and density have been adequately employed in understanding the nature of molecular systems and physico-chemical behaviour in liquid mixtures. The nonrectilinear behaviour of above mentioned properties of liquid mixtures with changing mole or volume fractions is attributed to the difference in size of the molecules and strength of interactions [1][2][3][4][5][6][7][8]. In recent past alcohols have found various applications and commercial use in medical and other fields, for example 1-Propanol (1-PrOH) is very effective against a broad spectrum of microorganisms including bacteria, fungi and viruses such as HIV, hepatitis-B, and respirator syncytial viruses.…”

Prediction of Static Dielectric Constant (ε₀) and Refractive Index (n) Using Various Models for Binary Mixtures (Acetophenone with N-Hexanol)

“…This can be explained as the addition of n-HxOH in ACP separates the associative n-HxOH molecules from each other decreasing the probability of those molecular orientations which exist in the pure liquid. It seems that the addition of n-HxOH molecules to ACP, some of the bonds are ruptured and resultant free molecules tend to form cluster with the unlike molecules available in the mixture [6][7][8][9]. The nearly linear variation of (n) (figure 1) suggests the absences of any contribution of electronic polarization in the binary mixtures.…”

“…Because of its outstanding role in applied sciences, hydrogen bonding in liquid systems has been intensively studied for long and it is still subject to a lively scientific debate. As molecules with -OH groups form associative liquid due to hydrogen bonding, the effect of molecules with other groups on these molecules are very important to understand the behaviour of hydrogen bonding in the presence of other groups [6][7][8][9][10][11]. A good number of literature surveys show that though attempts have already been made to study binary mixtures of alcohols with substituted aromatic compounds, but some systematic studies with concentration dependences are still scarce in case of phenone with alcohols.…”

Study of Molecular Interaction in Binary Mixtures of N,N-Dimethylformamide with 2-Butanol and 2-Pentanol at Temperatures Between 298.15 K and 323.15 K

“…Hydrogen bonding in liquid systems has been intensively studied for a long time and it is still subject to a lively scientific debate because of its outstanding role in chemical arena. 14 The amides containing multi-component solvent systems are interesting liquid systems for the study of molecular interactions. Because in chemical reactions and in many industrial processes the amides are the most common solvents used.…”