catena-Poly[[diaquamanganese(II)]-di- micro -1,1,3,3-tetracyano-2-ethoxypropenido-kappa4N1:N3].
The crystal structure of the title compound, [Mn(C(9)H(5)N(4)O)(2)(H(2)O)(2)], conventionally denoted Mn(EtO-TCA)(2)(H(2)O)(2), where EtO-TCA is 2-ethoxy-1,1,3,3-tetracyanopropenide, is described. The EtO-TCA anions bridge Mn(II) centers through one of the nitrile N atoms of each of their two dicyanomethanide groups, thus forming dibridged chains along ab. These chains are linked into two-dimensional sheets through hydrogen bonding. The seven-atom bridge, which results in a long Mn.Mn intrachain interaction [9.0044 (4) A], as well as the large interchain separations [8.3288 (4) and 8.5220 (4) A] prohibit long-range magnetic ordering down to temperatures as low as 1.55 K.
Schlueter
John A
JA
Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA. jaschlueter@anl.gov
Geiser
Urs
U