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 ?
The biggest difference between these two mechanisms is if the organometallic intermediates with C-M (metal)-C bonds exist.
Organometallic frameworks are classified as a new generation of porous crystalline materials.
Pombeiro presents this extensive research volume commemorating the 2012 International Conference on Organometallic Chemistry (ICOMC).
Chemtura Corporation says it will present new additive innovations within its line of flame retardants and organometallic specialties for plastics, together with investments in capacity expansion and supply chain optimisation at this year's K Show.
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.
This cavitand can be further functionalized with organometallic moieties that can be converted into nanoparticles.
Functional chemicals provided include organic peroxides, metal alkyls, organometallic specialties and polymer additives.
7,989,069 discloses an organometallic coating deposited from a metal alkoxide composition under conditions sufficient to form a polymeric metal oxide coating with unreacted alkoxide and hydroxyl groups.
Saudi Organometallic Chemicals Company (SOCC) has held a groundbreaking ceremony to initiate construction of a new aluminium alkyls manufacturing facility in Jubail, Saudi Arabia.
"We believe this is the first example of an organic that can compete with an organometallic in terms of brightness and color-tuning capability," said Kim, an associate professor at the university.
Organometallic compounds; preparation, structure and properties.
Further strategic domains include: - Homogeneous, heterogenous, bio-catalysis - New reactor design including high throughput - Polymer catalysis - Photocatalysis - In situ atomic-scale characterization - Modelization - Inorganic and organometallic synthesis KCC will be a node for international collaboration with the various universities connected with KAUST.