title: Magnetic ordering (Tc = 90 K) observed for layered [Fe(II)(TCNE*-)(NCMe)2]+[Fe(III)Cl4]- (TCNE = tetracyanoethylene).
abstract: [Fe(TCNE)(NCMe)2][FeCl4] is isolated from the reaction of TCNE and FeCl2(NCMe)2 and orders as a ferrimagnet below 90 K and is the initial member of a new class of magnets. It is the first metal-TCNE magnet with direct bonding between metal ion and [TCNE]*- whose structure has been determined, and it possesses a novel planar mu4-[TCNE]*- spin coupling unit bonded to four FeII's, with an axial pair of MeCNs. The [FeIIICl4]- anion occupies sites between the [FeII(TCNE*-)(NCMe)2]+ layers. [Fe(TCNE)(NCMe)2][FeCl4] has a coercive field of 1730 Oe and a remnant magnetization of 7500 emuK/mol at 50 K.
authors.affiliation: Department of Chemistry, University of Utah, Salt Lake City, Utah 84112-0850, USA.
authors.forename: Konstantin I
authors.initials: KI
authors.lastname: Pokhodnya
authors.forename: Michael
authors.initials: M
authors.lastname: Bonner
authors.forename: Jae-Hyuk
authors.initials: JH
authors.lastname: Her
authors.forename: Peter W
authors.initials: PW
authors.lastname: Stephens
authors.forename: Joel S
authors.initials: JS
authors.lastname: Miller