Make and break

What factors control bond making and breaking ... 

Rapid and reversible making and breaking of the sulfur-sulfur bond is essential to the biological function of a lipoic acid... 

Despite extensive studies, laser photochemical deposition has not yet replaced the conventional processes for fabrication of integrated circuits, except in selected appHcations such as making and breaking of selected links for customization of circuits and in the repair of defects. The reason is that laser processing of an entire wafer has remained more expensive than the conventional processes. 

Coorclijiatioii oj fuses with a switch or a contactor Since bolh these devices possess a certain level of making and breaking capacities, the same criteria will apply as for the breaker noted earlier. Rating of fuses shall not be more thtin the switch or contactor rating. 

They will make and break, without damage, all currents falling even outside the protected zone of a thermal overcurrenl relay or the built-in overcurrent (o/c) and short circuit (s/c) relea,ses of a breaker, but within the protected region of the HRC fuses, as illustrated by the hatched portion, of the overcurrenl and short-circuit,... 

Similarly, a contactor is a simple circuit making and breaking device, and is protected by other protective devices used in association with it. It has no role in the decision making for the current rating of other... 

Switch (to perform the making and breaking duties during the test)... 

Refer to the general arrangement of this breaker in Figure 19.4. In this device the moving contacts make and break in an oil bath. When the arc is formed during an interruption, the oil becomes decomposed due to excessive heat, and produces a few gases and vapours such as H2... 

Atoms move by making and breaking interatomic bonds and by minor "shuffling". 

Bond density surface for transition state for ene reaction shows making and breaking of bonds. 

Compare the geometry of maleic anhydride+propene, the ene transition state, to those of the reactants (maleic anhydride and propene). Is bond making and breaking occurring at once In particular, is the migrating hydrogen partially bonded to two carbons (rather than being fully bonded to one carbon ) Draw a Lewis structure to represent the transition state. Use dashed lines (.. and to represent partial bonds. 

Qualitative models of reactivity and quantum mechanical calculations of reaction paths both indicate an angular approach of the attacking nucleophile to the first-row sp -hybridized electrophilic centers M at intermediate and reactive distances, 29. The geometry of 29 is also characteristic for the case of nucleophilic addition to electron-deficient centers of main-group 12 and 13 elements. By contrast, a linear arrangement 30 of making and breaking bonds is required for sp -hybridized first-row centers (C, N, O)... 

Making and breaking the dioxygen 0—0 bond with participation of synthetic copper complexes with heterocyclic ligands 97ACR227. 

AbreisS funken, m. (contact) breaking spark. -2iinder, m. friction igniter (Elec.) make-and-break igniter, abresten, v.t. (Brewing) decant. 

I 70 Aldolases Enzymes for Making and Breaking C-C Bonds =03PO OH... 

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