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Related Concept Videos

Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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...
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

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...
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
Valence Bond Theory02:42

Valence Bond Theory

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...
Valence Bond Theory02:45

Valence Bond Theory

Overview of Valence Bond Theory
Bonding in Metals02:32

Bonding in Metals

Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.

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Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells
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Tin-lanthanoid donor-acceptor bonds.

Kornelia Zeckert1, Stefan Zahn, Barbara Kirchner

  • 1Universität Leipzig, Institut für Anorganische Chemie, Johannisallee 29, 04103 Leipzig, Germany. zeckert@uni-leipzig.de

Chemical Communications (Cambridge, England)
|May 13, 2010
PubMed
Summary
This summary is machine-generated.

Novel donor-acceptor complexes featuring a low-valent tin-lanthanoid bond were synthesized. Density Functional Theory (DFT) calculations confirmed the bond possesses significant covalent character, advancing organometallic chemistry.

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Application of Elemental Lanthanides in the Selective C-F Activation of Trifluoromethylated Benzofulvenes Providing Access to Various Difluoroalkenes
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Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
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Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging

Published on: July 21, 2011

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Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
13:21

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging

Published on: July 21, 2011

Area of Science:

  • Organometallic Chemistry
  • Inorganic Chemistry
  • Materials Science

Background:

  • Organotin compounds are versatile reagents in synthesis.
  • Lanthanoid complexes exhibit unique electronic and magnetic properties.
  • Donor-acceptor interactions are crucial for complex formation.

Purpose of the Study:

  • To synthesize novel donor-acceptor complexes.
  • To investigate the nature of the tin-lanthanoid bond.
  • To explore the reactivity of lithium tris(2-pyridyl)stannate.

Main Methods:

  • Reaction of lithium tris(2-pyridyl)stannate with lanthanoid compounds.
  • Characterization of the resulting complexes.
  • Density Functional Theory (DFT) calculations.

Main Results:

  • Formation of new donor-acceptor complexes.
  • Identification of a low-valent tin-lanthanoid bond.
  • DFT analysis indicated covalent character in the Sn-Ln bond.

Conclusions:

  • The synthesis of novel organometallic complexes was successful.
  • The tin-lanthanoid bond exhibits a degree of covalency.
  • This work expands the understanding of bonding in lanthanoid organometallic compounds.