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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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Crystal Field Theory
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...

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Cooperativity in Transition Metal Tetrylene Complexes.

Rosie J Somerville¹, Jesús Campos¹

¹Instituto de Investigaciones Químicas (IIQ) Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA) Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla Avenida Américo Vespucio 49 41092 Sevilla Spain.

European Journal of Inorganic Chemistry

|October 25, 2021

Summary

This summary is machine-generated.

Transition metals and tetrylenes exhibit cooperative reactivity, enabling novel chemical transformations. This research explores their combined potential for bond cleavage, cycloaddition, and insertion reactions.

Keywords:

Cooperative effects Group 14 elements Main group elements Multi-site activation Tetrylenes

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Area of Science:

Inorganic Chemistry
Organometallic Chemistry
Materials Science

Background:

Cooperative reactivity involving transition metals and ligands or multiple metals facilitates complex chemical transformations.
The exploration of cooperativity between transition metals and divalent heavier group 14 elements (tetrylenes) remains a less-developed area.
Tetrylenes possess unique ambiphilic properties, acting as both strong sigma-donors and possessing an empty p-orbital for electron acceptance.

Purpose of the Study:

To investigate the cooperative reactivity between transition metals and tetrylenes.
To showcase the diverse range of chemical transformations enabled by this emerging field of cooperativity.
To identify challenges hindering the catalytic application of metal-tetrylene cooperative systems.

Main Methods:

Formation of metal-tetrylene and metallotetrylene complexes.
Analysis of cooperative reactivity encompassing bond cleavage, cycloaddition, migration, metathesis, and insertion reactions.
Review and selection of representative examples from existing literature.

Main Results:

Demonstration of cooperative effects leading to metal-, tetrylene-, and multi-site-centered bond cleavage.
Examples of cooperative cycloaddition, migration, metathesis, and insertion reactions involving transition metals and tetrylenes.
Formation of stable metal-tetrylene and metallotetrylene complexes with adjacent reactive sites.

Conclusions:

Cooperative reactivity between transition metals and tetrylenes offers a powerful platform for novel chemical transformations.
The ambiphilic nature of tetrylenes is key to forming reactive complexes adjacent to metal centers.
Further research is needed to overcome current challenges for the catalytic implementation of these systems.