Solution properties of an antidiabetic drug metformin hydrochloride in aqueous urea and thiourea solutions: A physicochemical study

T. Sharma,R. Rani,Ashwani Kumar,R. Bamezai

Published 2020 in Journal of Molecular Liquids

ABSTRACT

Abstract Densities, speeds of sound and viscosities of metformin hydrochloride in water and in (0.025, 0.050 and 0.075) mol. kg−1 aqueous urea and thiourea solutions have been measured at T = (293.15, 298.15, 303.15, 308.15 and 313.15) K. From density data, apparent molar volume, Vϕ, limiting apparent molar volume, V0ϕ, slope, Sv, partial molar volume of transfer, ∆trV0ϕ, limiting apparent molar expansivity, E0ϕ, and Hepler's constant, (∂2V0ϕ/∂T2)P, have been measured. The apparent molar isentropic compression, Kϕ,s, limiting apparent molar isentropic compression, K0ϕ,s, slope, Sk, limiting apparent molar isentropic compression of transfer, ∆trK0ϕ,s and hydration number, nH have been calculated from speed of sound data. The viscosity data has been analyzed using Jones–Dole equation for viscosity B-coefficients and viscosity B-coefficients of transfer ΔtrB. The results have been interpreted in terms of solute-solvent and solute-solute interactions and structure making/breaking ability of solute in the aqueous solution of urea/thiourea.

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