0000000000871233
AUTHOR
Markus Hoelzel
Two stage magnetic ordering and spin idle behavior of the coordination polymer Co3(OH)2(C4O4)2·3H2O determined using neutron diffraction.
We report the magnetic structure of two of the magnetically ordered phases of Co(3)(OH)(2)(C(4)O(4))(2)·3H(2)O, a coordination polymer that consists of a triangular framework decorated with anisotropic Co(II) ions. The combination of neutron diffraction experiments and magnetic susceptibility data allows us to identify one phase as displaying spin idle behavior, where only a fraction of the moments order at intermediate temperatures, while at the lowest temperatures the system orders fully. This novel magnetic behavior is discussed within the framework of a simple Hamiltonian and representational analysis and rationalizes this multiphase behavior by considering the combination of frustratio…
[Be(ND 3 ) 4 ]Cl 2 : Synthesis, Characterisation and Space‐Group Determination Guided by Solid‐State Quantum Chemical Calculations
Treatment of BeCl2 with dry liquid ND3 and subsequent removal of the solvent leads to the colourless microcrystalline powder of [Be(ND3)4]Cl2. It crystallises in the orthorhombic space group Pna21 with a = 9.395(4), b = 11.901(6), c = 6.761(3) A, V = 755.9(6) and Z = 4 at 27 °C, and a = 9.3736(8), b = 11.8162(12), c = 6.6596(6) A, V = 737.62(12) and Z = 4 at –269.6 °C. The structure contains the tetrahedral tetraammineberyllium(II) cation which follows the octet rule. It was shown to be stable under ambient conditions and temperatures up to approximately 175 °C. We additionally discuss the aid of solid-state quantum chemical calculations for the assignment of proper crystallographic space g…