Molecular organic free radicals

Design of ferromagnetic coupling among organic free radicals and high-spin molecules in molecular assemblies... 

This could be important in some S0x-N0x scrubber systems (27). Further, some organic free radicals are formed easily by reaction with molecular oxygen. Reaction of these radcials with sulfite also can be used to initiate S02 autoxidation (12). 

Free radicals, or radicals, are defined as atomic or molecular species with unpaired electrons on an otherwise open shell configuration. Because a radical has a half-filled orbital, it easily sucks up an electron from another bond, hence exhibiting highly reactive properties and therefore likely to take part in chemical reactions. The first organic free radical is the triphenylmethyl radical, which was identified by Moses Gomberg in 1900 [34], Radicals play an important role in chemical processes such as combustion, atmospheric chemistry, polymerisation, plasma chemistry, biochemistry, etc. [35],... 

Reaction of the organic free radical with molecular oxygen together with further hydrogen removal results in a chain reaction ... 

Molecular Crystals of Organic Free Radicals that Carry Alkynyl Substituents 391... 

In the crystal of l,l,6,6-tetraphenyl-2,4-hexadiyne-l,6-diol and its analogs, solvents or third molecules are included in the vacant holes or channels made by the stacking host molecules [30]. These molecular spaces may include organic free radicals or open-shell organometallics in a specific orientation desirable for the ferromagnetic interaction. This possibility seems to be worthy of further exploration. 

If such reactions were to be coupled with the photochemical generation of organic free radicals or excited molecular states before the H-atoms combined or hydride ions reacted with HaO, the presence of photore-duced products would be explained. The generation of the powerfully nucleophilic peroxy radical-ions and hydroperoxide ions (Equation 8) also could be involved in instances of the oxidative displacement of halide from aromatic rings. 

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