[Mn(MAC){mu(1,5)-N(CN)(2)}](PF6): a new one-dimensional coordination polymer with mu(1,5)-dicyanamido bridges (MAC = pentaaza macrocyclic ligand) - synthesis, crystal structure and magnetic properties

Paraschiv C, Sutter JP, Schmidtmann M, Müller A, Andruh M. [Mn(MAC){mu(1,5)-N(CN)(2)}](PF6): a new one-dimensional coordination polymer with mu(1,5)-dicyanamido bridges (MAC = pentaaza macrocyclic ligand) - synthesis, crystal structure and magnetic properties. POLYHEDRON. 2003;22(12):1611-1615.The dicyanamido-bridged manganese(II) compound, [Mn(MAC){mu(1,5)-N(CN)(2)}](PF6), (1), has been obtained by reacting [Mn(MAC)(H2O)(2)]Cl-2.4H(2)O with NaN(CN)(2) and NaPF6 in a 1: 1: 1 molar ratio (MAC = 2,13-dimethyl-3,6,9,12,18-pentaazabicyclo-[12.3.1]octadeca-1(18),2,12,14 ,16-pentaene). The structure consists of [Mn(MAC){mu(1,5)-N(CN)(2)}](n)(n+) infinite chains and uncoordinated PF6- ions. The manganese ions display a pentagonal-bipyramidal geometry, with the macrocyclic ligand forming the equatorial plane. The {Mn(MAC)} units are connected through mu(1,5)-dicyanamido bridges (both nitrile nitrogens coordinated). The cryomagnetic investigation of 1 reveals a very weak exchange interaction between the manganese(II) ions within the chain (J = -0.49 cm(-1)). (C) 2003 Elsevier Science Ltd. All rights reserved