Reaction interrelated

From the findings presented concerning the reactions of P4 it follows that the formation of Li3P7 and therefore also of P7(SiMe3)3 takes place in several interrelated reaction steps which influence one another, but which cannot yet be detailed. We lack both a detailed picture of the reactive behavior of these compounds and a reliable knowledge of the first steps of the formation reactions. Therefore we sought to understand the problem by investigating simpler systems able to help in its solution. A re " of this approach now follows. 

Despite origination of interrelated reactions in the early 1900s, the outlook for chemical interference is expected to be, if not extraordinary, but quite useful for interpretation of complex events and voluntary control of processes proceeding in chemical and biological systems. 

Thus, an interaction between reactions may be performed both with the help of stable IP (consecutive reactions), intermediate compounds (initiation, conjugated reactions, etc.), and in their absence (a definite type of parallel reactions). Of special interest for us are interrelated reactions performed with the help of labile, highly reactive intermediate compounds. This question will also be discussed below. 

It should also be noted that equation (2.17) gives a more in-depth description of the physical sense of chemical induction phenomenon than equation (1.3). Thus, by introducing a qualitatively new notion of chemical induction (inducer participation is not obligatory for conjugation proceeding), equation (1.3) was modified so that it might be used to describe any type of conjugated process. On the other hand, equation (2.17) is quite universal and may describe other types of interrelated reactions (chemical interference). 

Nevertheless, equation (2.17) may help in determining the determinant and detecting the type of interrelated reactions from it. It should be noted here that, in the broad sense of the word, interrelated (interfering) reactions are only those proceeding via general intermediate substances, capable reagents, initiators or catalysts of secondary reactions. Otherwise, this class of reaction may be added to by consecutive reactions, which are not coherent. 

The chemical interference range is very broad. It embraces various types of interrelated reactions, including monomolecular secondary (non-conjugated) reactions. The best example... 

It seems to the author that these examples confirm the existence of a broad variety of the number of conjugation components. Actually, the classical definition of conjugated processes does not limit the number of substances participating in both interrelated reactions, which may be mono-, bi- or tri-molecular. 

Scheme 1. Interrelated reaction paths for the rhodium-catalyzed methanol carbonylation process [5c] Me = CH,.

Despite a prolonged lack of progress in the field, mechanistic understanding is recognized, sometimes implicitly, as the key to the engineering of reactions whose mechanisms involve combinations of interrelated reactions. The first step to such an understanding is to determine the reactions involved in the overall conversion process and their interdependences. This will identify the handles on the mechanism of the reao... 

Metabolism of the hexose monophosphate shunt in glucose-6-phosphate dehydrogenase deficiency and closely interrelated reactions. 

In contrast to heterogeneous catalysts, the compounds used in homogeneous transition metal catalysis have well-defined structures, as can be shown directly by analytical methods. Often, however, it is difficult to identify the species that is truly cat-alytically active because of the numerous closely interrelated reactions, which can often not be independently investigated. However, detailed knowledge of the reaction mechanism of homogeneous catalysis is a prerequisite for making optimal use of the reactions. 

The pH is an important parameter in the impregnation process and its influence on the liquid and solid parts of the interface has been described in Chapters 2 and 3. The impregnation solution consists of a mixture of acidic and basic species, whose initial concentrations have been fixed to meet several constraints (mainly the active phase content and its distribution in the pores) and that are subjected to various pH-dependent and interrelated reactions of association or dissociation till equilibrium is reached. On the solid side, the pH rules the sign of the global surface charge and the number of charged sites, and it affects the dissolution of the oxide support both thermodynamically and kinetically. 

Although not directly used as flavorants, the amino acids, as the prime constiments of proteins, not only play an essential role in body nutrition but also enter into the Maillard reaction when heated with reducing sugars. This initiates a series of interrelated reactions resulting in a complex mixture of highly aromatic compounds and a characteristic brown color. The chemistry of this reaction is dealt with in greater detail elsewhere (see Chapter 5). 

When talking about mixed reactions (series-parallel reactions, consecutive-competitive reactions), we refer to interrelated reactions that contain subprocesses that can be regarded... 

Autoxidation is quite complex and involves a great number of interrelated reactions of intermediates. Hence, autoxidation of food is usually imitated by the study of a model system in which, for example, changes of one unsaturated fatty acid or one of its intermediary oxidation products are recorded in the presence of oxygen under controlled experimental conditions. 

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