Peroxides mainly work as radical initiators for things like radical halogenation and other reactions, because of the homolytic cleavage of the O-O single bond.
12.
However, recombination of the nitrosyl radical with the alkoxyl radical ( a reversal of the homolytic cleavage ) has been shown to proceed without scrambling of isotope labels.
13.
The homolytic cleavage of the breaking bond is drawn with a'fish-hook'arrow to distinguish from the usual movement of two electrons depicted by a standard curly arrow.
14.
Due to the ready homolytic fission of the C Cl bond to create chlorine radicals in the upper atmosphere, chlorofluorocarbons have been phased out due to the harm they do to the ozone layer.
15.
The peroxide ion can be compared with other molecular oxygen ions superoxide and ozonide, but contrary to them, the peroxide is not a radical and not homolytic cleavage yielding two highly reactive radicals.
16.
Radical formation through homolytic bond cleavage most often happens between two atoms of similar electronegativity; in organic chemistry, this is often between the O & ndash; O bond in heterolytic fission of bonds and a radical-based mechanism.
17.
PGH2 contains a relatively weak epidioxy bond, and a possible mechanism is known to involve homolytic cleavage of the epidioxide and a rearrangement to TXA . A heme group in the active site of TXA synthase plays an important role in the mechanism.
18.
Labinger's argument, later demonstrated experimentally by Mazanec et al ., is based on the mechanism of methane activation, which is a radical mechanism, forming H and CH3 radicals by the homolytic cleavage of the C-H bond.
19.
The important point is CH 4 becomes vibrationally excited as a result of the collision with M . Vibrational excitation ( " chemical activation " ) is often necessary for a chemical reaction, such as the homolytic fission of a C H bond:
20.
Control in RAFT polymerization ( scheme 1 ) is achieved in a far more complicated manner than the homolytic bond formation-bond cleavage of SFRP and ATRP . The CTA for RAFT polymerization must cautiously chosen because it has an effect on polymer length, chemical composition, rate of the reaction and the number of side reactions that may occur.
