organometallic chemistry

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organometallic chemistry,

the reactions and use of a class of compounds (R-M) that contain a covalent bond between carbon and metal. They are prepared either by direct reaction of the metal with an organic compound or by replacement of a metal from another organometallic substance. Their use is based on the polar R-M bond, in which the carbon atom carries a partial negative charge, and on the nature of the metal atom. In synthesis they act as nucleophiles that can bond with relatively positive carbon atoms in compounds such as alkyl halides, aldehydes, and ketones. For example, the Grignard reagent, RMgX (where X equals Br, Cl, or I), and organolithium compounds react with ketones to give secondary alcohols. In industry, butyllithium is used for the polymerization of isoprene in the manufacture of synthetic rubber; metalloorganic compounds serve as catalysts. The semimetals, boron, and silicon are important organometallics; organoboranes are used in synthesis, while organosilicones are polymerized to manufacture plastics and elastomers. Many organometallics are toxic primarily because of the toxicity of the metal. For example tetraethyl leadtetraethyl lead
, (C2H5)4Pb, viscous, colorless, poisonous liquid. It is an organometallic compound prepared by reacting ethyl chloride with a sodium-lead alloy.
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 has been banned as gasoline additive and the conversion of mercury to mercury alkyls by fish has had serious consequences in Japan.
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References in periodicals archive ?
Singh, "Alkyne hydroamination triggered cyclizations: A powerful tool for the construction of biologically important structural motifs," Journal of Organometallic Chemistry, vol.
Pombeiro presents this extensive research volume commemorating the 2012 International Conference on Organometallic Chemistry (ICOMC).
Singh, "Palladium and half-sandwich ruthenium(II) complexes of selenated and tellurated benzotriazoles: synthesis, structural aspects and catalytic applications," Journal of Organometallic Chemistry, vol.
Dyson, "Development of organometallic (organo-transition metal) pharmaceuticals," Applied Organometallic Chemistry, vol.
Tiekink, "The rich diversity in tin carboxylate structures," Trends Organometallic Chemistry, vol.
Flowers University Professor at Harvard University, is being honored for his work n a range of fields, from nuclear magnetic resonance to organometallic chemistry and nanotechnology, which has had significant impact on a range of technology fields.
Colombo et al., "A new thiocyanate-free cyclometallated ruthenium complex for dye-sensitized solar cells: beneficial effects of substitution on the cyclometallated ligand," Journal of Organometallic Chemistry, vol.
The successful application of titanate coupling agents for better compounds depends upon understanding organometallic chemistry and physics, and why it is different from silanes and other additives such as lubricants, lecithin, surfactants, metal stearates, impact modifiers, plasticizers, etc.
Doolittle Award in Polymeric Material Science and Engineering, the Award in Organometallic Chemistry, the Award in Inorganic Chemistry, the Award in the Chemistry of Materials, and the Arthur Cope Senior Scholar Award in Organic Chemistry.