title: Coordination polymers of hexacyanotrimethylenecyclopropanediide and its monoanionic radical: synthesis, structure, and magnetic properties.
abstract: The first examples of polymeric complexes that contain the polynitrile dianion hexacyanotrimethylenecyclopropanediide (HCTMCP(2-)) were isolated and their magnetic properties have been explored. Complexes of the form (n-TBA)(2)[M(HCTMCP)(2)(H(2)O)(2)] (1) (M = Mn(II), Fe(II), Co(II), Cd(II)) possess (4,4) sheet structures with large cavities that contain the tetra-n-butylammonium (n-TBA) countercations. Synthesis using sodium as the countercation yields a family of products with the general form [M(S)(4)M(S)(2)(HCTMCP)(2)] (S = EtOH, M = Fe(II) (2); S = MeOH, M = Co(II) or Zn(II) (3)). These complexes adopt a variety of two-dimensional (2D) structures. The complex [Mn(3)(HCTMCP)(2)(H(2)O)(12)](HCTMCP)·6(H(2)O) (4) contains cationic (6,3) sheets with the counteranion and solvent molecules encapsulated within the hexagonal windows. Complexes 1-4 display weak antiferromagnetic coupling in all cases. The first example of a complex that contains the CN-coordinated monoanionic radical HCTMCP (•-), [Cu(HCTMCP)(MeCN)(2)] (5) is described. This one-dimensional (1D) coordination polymer, containing tetrahedral Cu(I) centers, displays medium strength antiferromagnetic coupling that is mediated through π-interactions between the radical anions on adjacent chains.
authors.affiliation: School of Chemistry, Monash University, Clayton, Victoria 3800, Australia.
authors.forename: Anna M
authors.initials: AM
authors.lastname: Kutasi
authors.forename: David R
authors.initials: DR
authors.lastname: Turner
authors.forename: Paul
authors.initials: P
authors.lastname: Jensen
authors.forename: Boujemaa
authors.initials: B
authors.lastname: Moubaraki
authors.forename: Stuart R
authors.initials: SR
authors.lastname: Batten
authors.forename: Keith S
authors.initials: KS
authors.lastname: Murray