For 1•2DMF the cyanide bridges from Fe sides are also slightly deviated from linearity with values Fe1-N12-C20 = 176.3 (7) and Fe2-N3-C22 = 172.8 (7) (Table ). All the Mo-C≡N bond angles are nearly linear ranging from 176.04° to 178.83° for both 1•2DMF•H2O and 1•2DMF. The octahedral distortion parameters (,  and ) and CShM factor calculated from the crystal structure at 120 and 240 K for 1•2DMF•H2O and at 270 K for 1•2DMF also suggests the presence of Fe(II) HS state for Fe1 and Fe2 in 1•2DMF•H2O and 1•2DMF (Tables ). For 1•2DMF the DMF molecules occupy the pore inside the crystal structure (Figure ). The pore size is comparable to that of 1•2DMF.H2O with length of 24.903 Å and width of 14.722 Å. The asymmetric unit has few H-bonding interactions between the DMF molecules, nitrogen atoms of free cyanide from [Mo(CN)8] 3-unit and carbon atoms of v-im ligands. (Figure , right).