THE INTERPLAY BETWEEN CONDUCTION ELECTRONS AND CHAINS OF LOCALIZED SPINS IN THE MOLECULAR-METALS (PER)2M(MNT)2, M=AU,PT,PD,NI,CU,CO AND FE

The properties of the compounds of the family Per2M(mnt)2 with alpha p hases are reviewed taking into account recent experimental results. Th e perylene chains, responsible for electronic conduction undergo Peier ls transitions at low temperatures. In the cases of M = Pt, Pd and Ni, the chains of M(mnt)2- units with localised spins have exchange inter actions with the conduction electrons and undergo spin-Peierls transit ions at the same temperatures. In the Fe compound only the Peierls tra nsition occurs as the localised spins stacks are already in the ground state.