ic7b00830_si_001.pdf (1.36 MB)
Three-Dimensional FeII–[MoIII(CN)7]4– Magnets with Ordering below 65 K and Distinct Topologies Induced by Cation Identity
journal contribution
posted on 2017-05-26, 13:51 authored by Dong-Qing Wu, David Kempe, Yan Zhou, Lin-Dan Deng, Dong Shao, Xiao-Qin Wei, Le Shi, Kim R. Dunbar, Xin-Yi WangTwo
cyanide-bridged compounds based on the FeII cation
and the anisotropic [MoIII(CN)7]4– anion, namely, {Fe2(H2O)5[Mo(CN)7]·5H2O}n (1) and {[NH2(CH3)2]2Fe5(H2O)10[Mo(CN)7]3·8H2O}n (2), have been prepared. Single crystal X-ray
analyses revealed that their structures exhibit different three-dimensional
topologies as a result of the addition of [NH2(CH3)2]+ during the synthesis of 2. For both 1 and 2, the geometry of the
[Mo(CN)7]4– unit is a slightly distorted
capped trigonal prism; all FeII centers are hexacoordinate
and adopt a distorted octahedral configuration. Compound 1 is a three-nodal 3,4,7-connected net with the point symbol of {4.62}{45.6}{46.612.83}, while compound 2 is a five-nodal 4,4,4,6,7-connected
net with the point symbol of {44.62}{45.6}4{46.67.82}{49.611.8}2. Magnetic studies revealed
that both compounds exhibit magnetic ordering below 65 K. Apart from
the plethora of MnII–[Mo(CN)7]4– compounds documented in the literature, these two FeII–[Mo(CN)7]4– compounds are the
only other [Mo(CN)7]4– extended structures
to be characterized by single crystal structures to date.
