Crystal structure of layered bis(ethylenediamine)nickel hexavanadate as a new representative of the V6O14 series.
A new [Ni(NH(2)CH(2)CH(2)NH(2))(2)](V(6)O(14)) compound has been synthesized hydrothermally and was found to crystallize in the monoclinic system. The single-crystal X-ray data leads to a disordered structure, which can be decomposed into two ordered models with different stacking of the V(6)O(14) layers. The structure of the layer is the same in both models and represents a new member of the V(6)O(14) series. All known structures from this series are constructed from the same chain of square pyramids (SP), which share alternatively adjacent or opposite edges of their bases. The differences lie in the orientation of the SP chains which are joined together by sharing corners with tetrahedra to form the layers. Combinatorial analysis of the V(6)O(14) structures was conducted, yielding ten possible symmetry groups for the series of V(6)O(14) layers. The known structures belong only to the three simplest cases with the highest symmetry.
Zavalij
PY
Materials Research Center, Binghamton University, Vestal Pkwy East, Binghamton, NY 13902-6000, USA. zavalij@binghamton.edu
Zhang
F
Whittingham
MS