DMF, HCONMe2 , is an aproric solvent (has no H for H-bonding) with a moderately high dielectric constant and a high dipole moment. Thus, although it dissolves many ionic compounds, DMF does not do so by forming H-bonds with the anions. The salts are dissolved, chiefly through solvation of the cation by attraction to the end of the C-O dipole. The + end of the dipole is shielded within the molecule and can solvate the anion very weakly, if at all.
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