Apparent molar volumes and compressibilities of selected electrolytes in dimethylsulfoxide

Interaction of 5-Chloro-2-hydroxy-3-nitroacetophenone in N,N-Dimethylformamide at Various Temperatures: A Viscometric, Volumetric and Ultrasonic Study

“…In case of acetophenone, the carbonyl group is highly polar in nature and carrying negative charge on its oxygen atom and proton acceptor and it can be self-associated by dipoledipole interactions. The main changes occur in association Table 4 Limiting values of V / , K s,/ along with slopes and B-coefficient of 5-chloro-2-hydroxy-3-nitroacetophenone in DMF at 298.15-313.15 K T/K V / 0 9 10 -6 S V 9 10 -6 K s,/ 0 9 10 -13 S k 9 10 -13 B-Coefficient dB/dT m 3 /mol m 3 /mol kg m 3 /mol/Pa m 3 /mol kg/Pa 10 -6 /m 3 Interaction of CHNA in N,N-Dimethylformamide equilibria that the rupture of C=O…H-C hydrogen bonded chain between DMF molecules, and mainly arise from the breaking of strong self-association interactions and dipoledipole interactions in acetophenone. Thus we can suggest that the addition of solute to DMF is responsible for hydrogen bonding network breaking.…”

“…The knowledge of acoustical properties of pure liquid and liquid mixtures furnishes information on molecular structure, nature, and strength of molecular interactions. The physical and chemical properties of solutions and biomolecules have been studied by many workers [1][2][3][4] and evaluated thermodynamic and other related parameters with structural changes occurring in solutions with respect to variation in concentrations and temperatures. N,N-dimethylformamide (DMF) is a versatile solvent, used in the synthesis of pharmaceuticals, in agriculture chemistry, and serves as solvent for many polymers.…”

Thermodynamic Properties of Inorganic Salts in Nonaqueous Solvents. VI. Apparent Molar Volumes, Expansibilities, and Compressibilities of Divalent Transition Metal Ions in Methanol and Dimethylsulfoxide

“…To discuss ion−solvent interaction effectively, the partial molar volumes of the salts were divided into the respective ionic contributions using the relation Φ V o ( M 2 + ) = Φ V o ( M X 2 ) − 2 Φ V o ( X − ) The literature values for limiting apparent molar volumes of perchlorate and trifluoromethanesulfonate ions obtained by the reference electrolyte method were employed in the calculation. ,, The partial molar volumes of the transition metal ions in DMSO and methanol calculated from eq are listed in Table . Figure shows the variation of their values at temperature 298.15 K. To complete the discussion, in Table as well as Figure we included the literature values of the partial molar volumes of the manganese(II) and zinc(II) ions in methanol .…”

Application of the tetraphenylphosphonium tetraphenylborate (TPTB) assumption to the thermodynamic properties of solvated ions in dimethylsulfoxide

“…On the other hand, in the case of the partial molar compressibilities, the main contribution is the effect of the ion-solvent interactions and the perturbation of the solvent structure (different, like it was shown in the present study), whereas the intrinsic compressibility contribution effect is very small. 10…”

“…The present study was undertaken as a continuation of our previous acoustic and volumetric experiments to check the validity of the TPTB approach for obtaining single-ion thermodynamic properties of electrolytes in dimethylsulfoxide solutions. 10 Due to wide range of its applicability in chemistry and biology DMSO has been extensively investigated in recent years. [11][12][13] That ''supersolvent'' for inorganic and organic materials is aprotic, strongly associated and has large dipole moment and dielectric constant (m = 3.96 D and e = 46.6 at 298.15 K).…”