Nomenclature Obsolete

The nomenclature of boron compounds involves some intricacies. IUPAC rules allow the terms borabenzene or borinine for 2 the older name borin has become obsolete with the recent revision of the extended Hantzsch-Widman system (6). Anions 4 are termed boratabenzene ions an alternative would be borininate instead of the earlier borinate (7). 

Aminotransferases have received many names as fashions in nomenclature have changed. Two obsolete names are still used in chnical practice glutamate-oxaloacetate transaminase (abbreviated to GOT) is now aspartate aminotransferase, and glutamate-pyruvate transaminase (GPT) is now alanine aminotransferase. The new abbreviations are AST and ALT, respectively. 

Report of the Committee on Nomenclature of the International Commission on Macromolecules, J. Polym. Sci., PartB Polym. Lett. 6, 257-260 (1968). Obsolete. 

The next locality by age is the upper layer at locality no. 4 of the Dunaalm s assemblage, which is readily allocated from its small-mammal finds its age is unquestionably Lower Pleistocene (the upper part of the Villany biotic zone, according to obsolete nomenclature, Giinz , Middle Villafranchian , etc.). A freshwater limestone complex at Siitto has proved to be somewhat older than this, according to a recent revision of the large-mammal fauna (see below Janossy and Krolopp, 1981). 

But note that in 4-(3-quinolinyl)-2-butenoic acid, the unsaturated chain means that substitutive nomenclature has to be used. Forms such as A P-3-quinolinebutanoic acid are obsolete and should not be used. 

According to lUPAC the term geometric isomerism" is an obsolete synonym of cis-trans isomerism and its use is strongly discouraged. Sometimes the term geometric isomerism has been used as a synonym of stereoisomerism, i.e. optical isomers being considered to be geometric isomers. This, however, is not consistent with current standard chemical nomenclature. The exact term for stereoisomers that are not optical isomers is diastereomers. 

Benz[a]anthracene, 9,10-dlmethyl- This compound is misnamed in STEDIt/IAN [see p. 159 in (3797)] and in ISHIGURO AND SUGAWARA (1884). It is 9,10-dimethyi-1,2-benzanthracene (obsolete nomenclature) or 7,12-dimethylbenz[a]anthracene (current nomenclature), reported by PIETZSCH (2962) and Krbller (2191). ... 

Benz[a]anthracene, 7,12-dimethyl- DMBA Benz[a]anthracene, 9,10-dimethyl-There can be no such compound as 7,12-dimethyl-1,2-benzanthracene because, according to the now obsolete nomenclature shown, there was never a 12 position in the 1,2-benzanthracene molecule. Also shown is 7,12-dimethylbenz[a]anthracene named according to the current nomenclature. 

During the twentieth century, what we now know as the International Union of Pure and Applied Chemistry (lUPAC) carried out major revisions and extensions of organic nomenclature culminating in the lUPAC Rules. The widely used 1979 and 1993 versions of these rules were joined in 2004 by an ambitious set of recommendations. Despite their sweeping scope, the 2004 recommendations do not render the 1979 and 1993 lUPAC rules obsolete. Rather, the three documents together comprise a col lection of systems that give the chemist wide latitude in choosing which of several acceptable ways to name a particular compound. 

Replacement nomenclature can clearly also be utilized for naming zwit-terions properly, although this approach may appear rather obsolete in view of the universally applicable directions of Table 11. 

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