cleavage of the C(4)-O bond of the resulting product ion B3 (m/z 263) produces the intermediate ion B4 (pathway a, Scheme 4).
This scheme conforms to the heterolytic
cleavage of the enzyme-bound [H.sub.2], i.e., one of the enzyme-bound [H.sub.2] has the rate constant ([k.sub.a]) for the isotope exchange reaction 10 times as that ([k.sub.b]) of the other, but the mode of heterolysis is not as simple as what was initially suggested as in reaction 3.
However, a number of homogeneous polar (heterolytic
) reactions have been found that are, in fact, accelerated or even suppressed by ultrasound [3-10].
Through a transient "side-on" coordination of [H.sub.2](g), these complexes activate dihydrogen gas in a heterolytic
Homolytic versus heterolytic
cleavage for the photochemistry of 1-naphthylmethyl derivatives.
Acids cause heterolytic
or ionic decomposition of the peroxide molecule (ROOR [right arrow] [R.sup.+] + [ROO.sup.-]).
Depending on homolytic cleavage or heterolytic
cleavage of the S-S bonds in the allicin there are allicin derivative radicals after dissociation of the S-S bond .
to synthesize 3-aminoindoles, during which attempt heterolytic
N-N bond cleavage occurred without cyclization due to the substituent effect.
Frigione, "The Transport of Water and its Effects on Properties of Cold-Curing Epoxy Adhesives," in Homolytic and Heterolytic
This is realized on the example of the rate and equilibrium constants for the heterolytic
Peroxynitric acid undergoes either homolytic cleavage to form the hydroxyl free radical (OH*) and the nitrogen dioxide free radical ([N[O.sub.2)]*) or heterolytic
cleavage to form the nitronium cation (N[O.sub.2.sup.+)] and the hydroxide anion (O[H.sup.-]) (12).
cleavage, when a single bond (two electrons) breaks leaving both the electrons on one of the fragments.