Disjunctive processes

Figure 8.1. Change in Bond Order injunctive and Disjunctive Processes...

Fundamental junctive/disjunctive processes involving interactions between two or three fundamental simplexes vide infra) are described as binary and ternary processes, respectively. A given process - be it binary or ternary- is either simple or complex. The junctive process is simple, if only junctive or disjunctive components are present it is complex, if jimctive and disjunctive components are both present vide infra). 

Simple binary and ternary junctive processes are denoted as (m,n)j, (m,n,p)j, respectively (m, n, p are the atomicities as of the participating simplexes i.e. rtvi,p=l,2. ). The corresponding reverse processes are denoted as (mnld, (nvi,p)d and they constitute simple disjunctive processes (subscripted suffixes j and d, mean junctive and disjunctive, respectively). Figure 8.4 depicts cartoon representations and notational designations of simple binary and ternary junctive processes (the square bracketed entity, in each case, represents a conjunctive slate). ... 

The notation for a reverse (disjunctive) process is identical with that for the corresponding junctive processes except for the subscript j (for junctive) the latter is modified to u (for disjunctive). For example, the reverse of the (l,2)j process 38- [39] is (1,2) process [39]- 38. Figure 8.4 includes the notational designations of all the pure reverse/disjunctive processes. 

Figure 8.5. Cartoon Representations of Complex Jimctive/Disjunctive Processes...

Figure 8.6. Simplex Notation for Junctive/Disjunctive Processes...

A junctive/disjunctive process may be a composite of both types of simplexes - fundamental and topological. Such a process can be represented by a generalized notation, similar to the ones described above. Figure 8.10 (p. 12) illustrates four representative cases. 

Fundamental junctive/disjunctive processes (shown in square parentheses) are derived from fundamental simplexes, and are either simple or complex ... 

In describing junctive/disjunctive processes, with increasing numbers of interacting molecular entities, and increasing number of interactions beween different reactive sites, the denotation can... 

Figure 8.16. Summary of Notations for Fundamental, Composite and Topological Simplexes and Fundamental, Composite and Topological Processes, and, Molecular Junctive/Disjunctive Processes...

Figure 9.1. Changes in Bond Order in Junctive/Disjunctive Processes vs. Ligogenic/Ligolytic Processes...

In a given chemical transformation, reactive atoms may undergo changes in hybridization and valency. For example, a tetravalent sp atom in a reactant molecule may change to a (a) dsp pentavalent, (b) sp trivalent or (c) different sp-" tetravalent atom in the conjunctive state or product. The first of these is a junctive process (Figure 16.1, l->2). The second one is a disjunctive process (1 3). In the third case, the process is substitutive (1 4, as in an 5 2 transformation) -it is simultaneously "lytic" and "genic". 

---