Systemic nomenclature

Hansa Yellows, 1, 334 5, 299 Hantzsch synthesis, 2, 87-88 1,4-dihydropyridine, 2, 482 thiazoles, 6, 294-299 A -thiazolines, 6, 314 Hantzsch-Widman names parent names, 1, 35 stem suffixes, 1, 12 Hantzsch-Widman system nomenclature, 1, 11-12 Hardeners in photography... 

When the structures of derivatives of the parent compounds depart more and more from those of the original sugars, the bridged-system nomenclature may be advantageously applied over the carbohydrate terms. This could be the case when one, or both, of the OH groups on C-4 and C-8 is (are) absent, as in the deoxy series (see Section V,3), and also in the oxidation products (see Section V,4), where sugar-derived names become complex. 

Meanwhile, in the process of formulating the proposed, unifying, systemic nomenclature, there will be the need to introduce many other terms, which have limited, highly specialized meanings. The first time each such term is encountered it will be described in detail. 

The advantages that will accrue by adopting this new systemic nomenclature include ... 

Observe that the systemic nomenclature being developed is a strictly analytic,... 

Applying the proposed systemic nomenclature to the above cumulene and polyacetylene, their respective names are ... 

Additionally, unlike as suggested in the Lewis structure, this proposed systemic nomenclature correctly describes that neither the ligand sulfur nor any of the three oxygen ligands should be viewed as having priority to being "doubly bonded" to the central sulfur atom. 

Note that, even though it is not absolutely required, the inclusion of the zero bridge in (15) is recommended — In this way the reader will not be misled into thinking that there was a typographical error. On the other hand, for most, if not all, larger propellanes, this bond is existent and these compounds would have names comparable to (16), rather than (15). In other words, the proposed systemic nomenclature accurately describes the actual chemistry that has been measured, instead of some fictitious "logical extrapolation" from "similar" compounds. 

Next, just as the synergy between nomenclature and chemical structure was illustrated for biphenyl vs. biphenylene, attention is directed to a newly discovered compound having a bent sp-hybridized skeleton [26], Due to the postulation of the bet bond (Chapter 2), the proposed systemic nomenclature for the trisilaallene molecule does not convey the false picture... 

For clarity in the following discussion, structure (5.11) shows the numbering system of the 2,2,1-bicycloheptyl skeleton. This ring system nomenclature is based on the bridgehead carbon atoms. To name a bicyclic compound, one first identifies the two bridgehead carbon atoms and then counts the number of atoms in each bridge. Thus in structure... 

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