Related Experiment Video
Updated: Jan 11, 2026
Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
Crystal structure of a μ-oxo vanadium(V) dimer coordinated by a salan ligand
Isha A Kallingal1, Anais A Alvarado1, S Chantal E Stieber1
1Department of Chemistry & Biochemistry Cal Poly Pomona, 3801 W Temple Ave Pomona CA 91768 USA.
None:
A μ-oxo vanadium(V) dimeric complex, μ-oxido-bis-[(2,2'-{[ethane-1,2-diylbis(aza-nedi-yl)]bis-(methyl-ene)}diphenolato)oxidovanadium(V)],[V2(C16H18N2O2)2O3] (1), was crystallized by slow evaporation from an ethanol solution. The μ-oxo dimer crystallizes in the monoclinic space group C2/c where the salan ligand 1a coordinates to the vanadium center in a κ2 N,κ2 O fashion, forming a distorted octa-hedral geometry. The bridging oxo ligand lies on a crystallographic twofold axis. The unit cell consists of four mol-ecules of 1 that are linked by C-H⋯·πarene inter-actions as well as intra-molecular hydrogen bonding.
Related Concept Videos
02:42Valence Bond Theory
02:58Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
02:42Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
02:51Metal-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...
02:57Coordination Number and Geometry