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Bonding diagram of diborane (B 2 H 6) showing with curved lines a pair of three-center two-electron bonds, each of which consists of a pair of electrons bonding three atoms; two boron atoms and a hydrogen atom in the middle. The structure of diborane has D 2h symmetry. Four hydrides are terminal, while two bridge between the boron centers.
Ketones, aldehydes, carboxylic acids, esters, amides, and acid halides - some of the most pervasive functional groups, -comprise carbonyl compounds. Carboxylic acids, esters, and acid halides can be reduced to either aldehydes or a step further to primary alcohols , depending on the strength of the reducing agent.
A combination of experimental and theoretical data has been used to determine the structure and properties of diborane(2). Theoretical data found that the molecule has a 3 Σ-g ground state conformation, indicating a particular orientation with threefold rotational symmetry and a vertical mirror plane. [8]
In chemistry, functionality is the presence of functional groups in a molecule. A monofunctional molecule possesses one functional group, a bifunctional (or difunctional) two, a trifunctional three, and so forth. In organic chemistry (and other fields of chemistry), a molecule's functionality has a decisive influence on its reactivity
STAB selectively reduces the imine intermediate formed through dehydration of the molecule. [8] STAB is a weaker reductant than NaBH 4, and can preferentially reduce the imine group in the presence of other reduction-sensitive functional groups. While STAB has also been reported as a selective reducing agent for aldehydes in the presence of ...
The conversion can be effected by many reagents. The nitro group was one of the first functional groups to be reduced. Alkyl and aryl nitro compounds behave differently. Most useful is the reduction of aryl nitro compounds.
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In organic chemistry, alkylidene is a general term for divalent functional groups of the form R 2 C=, where each R is an alkane or hydrogen. [1] They can be considered the functional group corresponding to mono- or disubstituted divalent carbenes (known as alkylidenes), [2] or as the result of removing two hydrogen atoms from the same carbon atom in an alkane.