Organometallic compounds carbon-metal bonding

Organometallic compounds When a compound has a covalent bond between a carbon and a metal, it is called an organometallic compound. Carbon-metal bonds vary widely in character from covalent to ionic... 

Naturally occurring compounds with carbon-metal bonds are very rare The best example of such an organometallic compound is coenzyme Bi2 which has a carbon-cobalt ct bond (Figure 14 4) Pernicious anemia results from a coenzyme B12 deficiency and can be treated by adding sources of cobalt to the diet One source of cobalt IS vitamin B12 a compound structurally related to but not identical with coen zyme B12... 

Organometallic compounds contain a carbon-metal bond They are named as alkyl (or aryl) derivatives of metals... 

Nuclear Magnetic Resonance Spectra of Organometallic Compounds, 3, 1 Of Time and Carbon-Metal Bonds, 9, 1... 

There are distinct structural types of organic compounds containing metals and metalloids. The first contain covalent carbon-metal bonds and are strictly organometallic compounds, for example, the alkylated compounds of Hg, Sn and Pb, and of Li, Mg, and A1 (and formerly Hg), which have been extensively used in laboratory organic synthesis, and A1(C2H5)3 that is a component of the... 

Compounds that contain carbon-metal bonds are called organometallic compounds. 

This class of rather miscellaneous organometallic compounds, all with carbon-metal bonding, contains the separately treated groups ... 

Alkyl halides are most commonly converted to organometallic compounds that contain carbon-metal bonds, usually Mg or Li. 

Organometallics may add to carbon-carbon multiple bonds to form new organome-tallic compounds. These reactions are called carbometallations since the carbon-metal bond adds across the multiple bond. In most cases the newly formed organometallics are further transformed to produce other valuable organic... 

Wilkinson s catalyst after its discoverer, G. Wilkinson. In 1973, the Nobel Prize in chemistry was awarded jointly to Wilkinson and E. O. H. Fischer for their respective contributions to the field of organometallic chemistry. As you will see in this and later chapters, compounds with carbon-metal bonds (organometallic compounds) are extremely useful reagents, reactive intermediates, or catalysts in organic reactions. To a very large extent, the work of Fischer and Wilkinson created the current interest and developments in the field of transition-metal organic chemistry, which will be discussed in Chapter 31. 

One of the more important reactions of organohalogen compounds is the formation of organometallic compounds by replacement of the halogen by a metal atom. Carbon is positive in carbon-halogen bonds and becomes negative in carbon-metal bonds, and therefore carbon is considered to be reduced in formation of an organometallic compound (see Section 11-1) ... 

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