Other carbon-linked functionality

The x-ray structure of the monosodium salt of 4-nitro-3,5-dicarboxylic acid shows that it is the 

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Other carbon-linked functional groups. 3.4 Amino and mercapto groups... 

The weakest bond in a polymer chain determines the overall thermal stability of the polymer molecule. The aliphatic carbon-carbon bond has a relatively low bond energy (see Table 5.1). Oxidation of alkylene groups is also observed during prolonged heating in air. Thus the weak links to be avoided are mostly those present in alkylene, alicyclic, unsaturated, and nonaromatic hydrocarbons. On the other hand, the functions proven to be desirable are aromatic (benzenoid or heterocyclic) ether, sulfone, and some carboxylic acid derivatives (amide, imide, etc.). Aromatic rings in the polymer chain also give intrinsically stiff backbone. 

The activity of folacin is similar to the activity of cobalamins. It is linked with the transfer of one of the carbon functional groups, such as methyl (CH3-), methylene (-CH2-), formyl (-CH=0) and other groups whose donor is mainly chohne, glyoxyhc acid, serine and other compounds. These functional groups are bound... 

Many organic molecules consist predominantly of a backbone of carbons linked by single bonds, with only hydrogen atoms attached. However, they may also contain doubly or triply bonded carbons, as well as other elements. These atoms or groups of atoms tend to be sites of comparatively high chemical reactivity and are referred to as functional groups or functionalities. Such groups have characteristic properties, and they control the reactivity of the molecule as a whole. 

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