[CH3NH2(CH2)2NH2CH3][M2(HCOO)6] (M = Mn~(II) and Co~(II)): Weak Ferromagnetic Metal Formate Frameworks of Unique Binodal 6-Connected (4~(12) centre dot 6~3)(4~9 centre dot 6~6) Topology,Templated by a Diammonium Cation

摘要

Two compounds of [dmenH_2~(2+)][M2(HCOO)_6~(2-)] (M = Mn~(II) and Co~(II)),synthesized using N,N'-dimethylethylenediammonium (dmenH_2~(2+)) as the template,possess anionic metal formate frameworks of a novel binodal 6-connected (4~(12) centre dot 6~3)(4~9 centre dot 6~6) topology.They are the first coordination examples of this unique network closely related to niccolite and colquiriite and exhibit 3D long-range antiferromag-netic ordering with small spin canting.