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Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

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Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
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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.
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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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Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
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Complexometric Titration: Ligands00:43

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Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
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Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
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Metalated Oligosilanylstibines.

Rainer Zitz1, Judith Baumgartner2, Christoph Marschner1

  • 1Institut für Anorganische Chemie, Technische Universität Graz , Stremayrgasse 9, 8010 Graz, Austria.

Organometallics
|May 5, 2015
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Summary
This summary is machine-generated.

Researchers synthesized novel magnesium and potassium stibides from a bromostibine precursor. These stibides serve as versatile building blocks for creating new antimony-containing organometallic compounds.

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Area of Science:

  • Organometallic Chemistry
  • Main Group Chemistry
  • Silicon Chemistry

Background:

  • Cyclic bromostibines are precursors to antimony-containing compounds.
  • Silylated stibines offer unique reactivity pathways.
  • The synthesis of low-valent antimony species remains challenging.

Purpose of the Study:

  • To synthesize and characterize novel magnesium and potassium stibides.
  • To explore the reactivity of these stibides as building blocks.
  • To investigate the formation of antimony-containing oligosilanides.

Main Methods:

  • Reaction of a cyclic disilylated bromostibine with magnesium.
  • Silylation of the magnesium stibide with trimethylchlorosilane.
  • Reaction of the trisilylated stibine with potassium tert-butoxide.
  • Characterization of the resulting antimony compounds.

Main Results:

  • A rare magnesium stibide was synthesized and silylated.
  • A clean synthesis of a potassium stibide was achieved.
  • An unexpected potassium stibide formed via a 1,2-silyl shift during oligosilanide synthesis attempts.
  • Stibides were used to prepare stibylated zirconocene and hafnocene complexes.

Conclusions:

  • Novel magnesium and potassium stibides are accessible synthetic intermediates.
  • These stibides demonstrate significant potential as building blocks in organometallic synthesis.
  • The study highlights the complex reactivity of antimony silanides, including silyl shifts.