The temperature dependence of magnetic susceptibility measurements were carried out on a polycrystalline sample of 1•2DMF•H2O at a magnetic field of 10000 Oe in the temperature range of 2-350 K (Figure ). At 300 K, the measured T ( is the magnetic susceptibility equal to M/H per MoFe2 unit) value is 7.14 cm 3 mol -1 K (Figure ), which lies in the expected range of T obtained for two noninteracting HS Fe(II) ions (S = 2, g = 2.2) and one LS Mo(V) ion (S = 1/2, g = 2.0). Upon decreasing the temperature, the T value remains nearly constant up to 60 K and below this temperature, the T value decreases rapidly to 1.70 cm 3 mol -1 K at 2 K (Figure , blue curve). This is probably due to the combination of magnetic anisotropy coming from the HS Fe(II) centres and weak antiferromagnetic interactions between the HS Fe(II) centers connecting via cyanide bridge. When the sample was further heated up to 350 K, 1•2DMF•H2O experiences a weight loss and converts to partially desolvated form 1•2DMF after losing one water molecule (confirmed by the TGA analysis, vide supra). When the complex 1•2DMF cooled down from 350 K to 2 K, an interesting phenomenon has occurred. The T value starts decreasing smoothly with a decrease in temperature down to 50 K to a value of 1.72 cm 3 mol -1 K and then remains almost constant down to 20 K. The value at 20 K is slightly higher than expected for two Fe(II) ions in a LS state (S = 0) and one LS Mo(V) ion (S = ½) which indicates that residual HS Fe(II)