Related Experiment Video
Updated: Aug 15, 2026

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
Published on: July 3, 2015
Structural Comparison of Iron Tetrapolyvanadate Fe(2)V(4)O(13) and Iron Polyvanadomolybdate
Xiandong Wang1, Kevin R. Heier, Charlotte L. Stern
1Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113.
Abstract:
Single crystals of the iron tetrapolyvanadate Fe(2)V(4)O(13) and the iron polyvanadomolybdate Fe(2)V(3.16)Mo(0.84)O(13.42) were grown from Fe(2)O(3)/V(2)O(5) and Fe(2)O(3)/V(2)O(5)/MoO(3) melts, respectively. Single-crystal X-ray diffraction revealed that the two structures are closely related. Both contained isolated Fe(2)O(10) octahedral dimers with similar orientations. The unusual U-shaped V(4)O(13)(6)(-) clusters in Fe(2)V(4)O(13) were ordered while the U-shaped [V(3.16)Mo(0.84)O(13.42)](6)(-) clusters in Fe(2)V(3.16)Mo(0.84)O(13.42) were disordered. The substitution of molybdenum(VI) for vanadium(V) revealed a new substitution mechanism, in which a corresponding stoichiometric amount of oxygen was brought into the structure for charge balance with no reduction of the V(5+) and Mo(6+) ions. Crystal data: for Fe(2)V(4)O(13), monoclinic, space group P2(1)/c (No. 14), with a = 8.300(2) Å, b =9.404(6) Å, c = 14.560(2) Å, beta = 102.08(1) degrees, and Z = 4; for Fe(2)V(3.16)Mo(0.84)O(13.42), monoclinic, space group P2(1)/c (No. 14), with a = 7.678(1) Å, b = 9.456(2) Å, c = 8.336(2) Å, beta = 109.50(2) degrees, and Z = 2.
Related Concept Videos
Properties of Transition Metals
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Coordination Number and Geometry
Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Valence Bond Theory
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.

