Solvent enhancement of the magnetic ordering temperature (Tc) of the room temperature V[TCNE]x · S (S = solvent, TCNE = tetracyanoethylene; x ∼ 2) magnet

The reaction of TCNE and V(CO)6 and several solvents (S) form an immediate black precipitate of V(TCNE)x · yS (S = solvent; x ∼ 2; y ∼ 0.5), which have a magnetic ordering onset temperature in the range of 385-390 K. When S = PhCF3 in addition to the onset temperature being enhanced it exhibits greater thermal stability.