heterolysis

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heterolysis

[‚hed·ə′räl·ə·səs]
(organic chemistry)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The heterolytic 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 fashion, i.e.
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 [25].
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 Reactions.
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).
* Heterolytic cleavage, when a single bond (two electrons) breaks leaving both the electrons on one of the fragments.