ハロゲン化ドナーよりなる新規錯体(DIEDO₂)₂M(mnt)₂ (M=Ni,Pt)はドナーによる金属伝導とアニオンスピン間の強磁性相互作用の共存する系である．常圧では約100KでSDW転移と思われる絶縁化を起こすが，加圧とともに転移温度は低下し11kbar以上で21K程度の一定値をとる．さらにこの系で得られた知見より新たなハロゲン化ドナーとしてXMEDT (X=Br,I)を合成，磁気相互作用と伝導性の共存する系を得る事にも成功した．

New class of halogenated-donor-based salts (DIEDO)₂M(mnt)₂ (M=Ni,Pt) show metallic conductivity and ferromagnetic interaction. These salts have metal-insulator transitions at about 100K. Application of pressure makes the transition temperature lowered and approach T_M-I=21K for P>11kbar. This suggests that the transition is not suppressed because of structural one dimensionality. To develop further halogenated-donor-basedsalts, we synthesized the XMEDT (X=Br,I) and got new salts of XMEDT in which metallic conductivity coexists with magnetic interaction.