Densities and apparent molar volumes for Mn(ClO4)(2), Co(ClO4)(2), Ni(ClO4)(2), Cu(ClO4)(2), and Zn(ClO4)(2) in N, N-dimethylacetamide (DMA) solutions at T = 298.15 K are reported. Densities and apparent molar volumes of tetrabutylammonium tetraphenylborate and tetrabutylammonium perchlorate were determined, and used to obtain the partial molar volume for the ClO4- anion. The partial molar volumes of the DMA-solvated cations are derived, and their variation within the Mn2+ to Zn2+ series is discussed in terms of structure and stability of the coordination clusters. The ligand field effect on the partial molar volume is demonstrated.