By Seymour B. Elk

As a byproduct of ancient improvement, there are diverse, unrelated structures of nomenclature for "inorganic chemistry", "organic chemistry", "polymer chemistry", "natural items chemistry", and so forth. With every one new discovery within the laboratory, in addition to each one new theoretical concept for a chemical, the strains that often have separated those "distinct" subsets of subject constantly develop extra blurred. This loss of uniformity in characterizing and naming chemical substances raises the conversation problems among in a different way informed chemists, in addition to different scientists, and drastically impedes development. With the set of recognized chemical compounds numbering over 42,000,000 (in Chemical Abstracts' info base) and continuously growing to be (about 2,000 new additions each day), the desirability for a unified method for naming all chemical substances at the same time grows. in addition, so as to meet the necessities of disparate teams of scientists, and of society as a rule, the identify assigned to a given chemical should still, not just uniquely describe that substance, but in addition might be part of a conveniently recognizable order for the total box. For those reasons, a topology-based "bi-parametric" method of nomenclature is herein proposed.- during this publication, a brand new nomenclature process is proposed- the recent nomenclature is acceptable to a 3 dimensional international, and is internally constant- This nomenclature unifies ALL branches of chemistry, elimination the necessity for numerous shortly latest units of principles"

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This latter set is described in the next section. At this point the focus of developing nomenclature is returned to definition #14 given above. Note that although the term "locant" would not be created for another quarter century, the idea that underlies this term and its importance in nomenclature was evident despite that a term for this idea was not yet in the vocabulary. This may be seen in the "Proposed International Rules for Numbering Organic Ring Systems" [67]. In these rules, rings are subdivided into four categories: (A) Single rings; (D) Free Spiro Unions; (B) A selected, circumscribed set of two or more rings; and (C) none of the above.

23 preoccupied with planarity, as was the custom of that time. Additional items of concern in Patterson's paper delineating IUPAC's system of organic chemical nomenclature include: (a) the priority for ordering atoms; namely, they be "... as high a group in the periodic table ... " By this rule, not only would organometallic compounds be either permanently relegated to the category of inconsequential — after all of the nonmetal carbon combinations had been described or else forced to form their own new fiefdom — which they did.

Each new locant number beyond those in the principal chain are indicated by (=#). For example, see (9) Acenaphthylene, etc. in Table 1 of Chapter 3. Subscripts = ligand (bond and atom) multiplicity. For all but a very few small trees, the smallest number attained by this process will have the root at the center of the graph. The name assigned to that node by this protocol is a Matula number. Each number so achieved is unique to a particular rooted tree and can thus be called the name of that tree.

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