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Valence Bond Theory

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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...

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Self-Assembled, Iron-Functionalized Polyoxovanadate Alkoxide Clusters.

Feng Li¹, Lauren E VanGelder¹, William W Brennessel¹

¹Department of Chemistry, University of Rochester , Rochester, New York 14627, United States.

Inorganic Chemistry

|July 21, 2016

Summary

This summary is machine-generated.

Researchers synthesized novel iron-functionalized polyoxovanadate clusters. These mixed-valent clusters offer a new template for studying organometallic properties and electronic delocalization.

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Area of Science:

Inorganic Chemistry
Materials Science

Background:

Polyoxovanadate clusters are well-defined molecular frameworks.
Hexavanadate clusters with the Lindqvist core (M6O19(n-)) are known structures.
Organometallic properties of such clusters are of scientific interest.

Purpose of the Study:

To synthesize novel iron-functionalized, mixed-valent polyoxovanadate alkoxide clusters.
To develop a new template for investigating the organometallic properties of these systems.
To characterize the electronic structure and properties of the synthesized clusters.

Main Methods:

Synthesis of iron-functionalized hexanuclear Lindqvist clusters.
Characterization using 1H NMR, Fourier transform infrared (FTIR), and electron absorption spectroscopies.
Mass spectrometry analysis via electrospray ionization (ESI-MS).

Main Results:

Successful synthesis of [V5O6(OCH3)12Fe]X clusters (X = Cl, Br, SO3CF3).
Spectroscopic data (IR, UV-vis) indicate significant electronic delocalization within the clusters.
The iron substitution provides a novel route to modify and study these polyoxovanadate systems.

Conclusions:

The synthesized iron-functionalized polyoxovanadate clusters represent a new class of mixed-valent compounds.
These clusters serve as a valuable template for exploring organometallic chemistry.
The observed electronic delocalization highlights the potential for tuning electronic properties in polyoxovanadates.