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Related Concept Videos

Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

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In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
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Valence Bond Theory02:42

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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Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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...
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Formation of Complex Ions03:45

Formation of Complex Ions

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A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

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In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
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Colors and Magnetism03:02

Colors and Magnetism

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Color in Coordination Complexes
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...
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Synthesis of a Borylated Ibuprofen Derivative Through Suzuki Cross-Coupling and Alkene Boracarboxylation Reactions
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Acyclic Boryl Complexes of Copper(I).

Rex S C Charman1, Josie A Hobson1, Ross A Jackson1

  • 1Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|October 11, 2023
PubMed
Summary

This study introduces novel copper boryl compounds, (6-Dipp)CuB(OMe)2 and (6-Dipp)CuB(OMe)NMe2, synthesized via sigma-bond metathesis. These compounds demonstrate reactivity in C-B bond insertions and catalytic CO2 deoxygenation.

Keywords:
N-heterocyclic carbeneacyclicborylcopper

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Area of Science:

  • Organometallic Chemistry
  • Boron Chemistry
  • Copper Catalysis

Background:

  • Copper complexes with boryl ligands are valuable in synthesis.
  • Understanding the reactivity of copper-boryl bonds is crucial for catalytic applications.

Purpose of the Study:

  • To synthesize and characterize novel monomeric acyclic boryl copper complexes.
  • To investigate the reactivity of these complexes with unsaturated substrates and in catalysis.
  • To explore the electronic properties of these boryl species.

Main Methods:

  • Sigma-bond metathesis reaction between a copper precursor and B2(OMe)4.
  • Characterization using NMR spectroscopy and X-ray crystallography.
  • Investigation of reactivity with ethylene, diphenylacetylene, and CO2.
  • Computational studies for electronic property analysis.

Main Results:

  • Successful synthesis of monomeric acyclic boryl copper complexes: (6-Dipp)CuB(OMe)2 and (6-Dipp)CuB(OMe)NMe2.
  • Observed insertion of ethylene and diphenylacetylene into the Cu-B bond.
  • Demonstrated catalytic deoxygenation of CO2.
  • Confirmed electronic similarity to related boryl species.

Conclusions:

  • Novel monomeric acyclic boryl copper complexes were synthesized and characterized.
  • These complexes exhibit diverse reactivity, including insertion reactions and catalytic CO2 deoxygenation.
  • The findings expand the scope of copper-boryl chemistry and its catalytic potential.