Introduction
3
b) as long as the intended specification remains unambiguous the lowest
number of markers (see above) should be used.
Since for many hydrocarbon and heterocyclic parent structures traditional designations are retained, priorities according to the principle of
lowest locants and lowest numbers are not always strictly obeyed. In such
cases seniorities were assigned more or less arbitrarily.
Since the IUPAC nomenclature system relies totally on the pivotal concept of the "parent structure" to which, in a second sphere, substituents are
assigned, it appeared advisable to maintain this division also for the chapters of this book. Thus, we begin with the exposition of the nomenclature
rules for parent structures and, in the second chapter, proceed with the discussion of the different types of nomenclature for substituted systems,
radicals, and ions; in the third chapter specific classes of functional compounds are addressed, followed, in the forth chapter, by the treatment of
metal organyls and, in the fifth, of carbohydrates. The concluding sixth
chapter takes up once again the construction of the final names of
complex compounds including isotopic modifiers and stereochemical
descriptors.
To derive maximum benefit from this book, several technical points
should be noted before embarking on its use. To avoid confusion, the term
"radical", formerly also used for molecular fragments with pending
valences, will now only be employed to designate factual, physical radicals.
For nomenclature purposes this term is replaced by the expression "substituent group". Priority criteria are applied successively - when a foregoing criterion is not conclusive, the next one comes into force. The use of
hyphens sometimes appears quite arbitrary; if it promotes clarity liberal
use thereof might be justified. The examples given are taken from recent
research reports or have been devised in such a way that they cover the pertinent rules as completely as possible. If older systematic names are still in
use they are considered as "traditional names". The same holds for trivial
names in widespread use. When deviations of Chern. Abstr. names from
IUPAC names are to be emphasized this will also be duly indicated. In
order to familiarize the reader with the extraordinary flexibility of the
chemical formula- and sign-language the formula drawings deliberately
display the whole spectrum of the graphic possibilities of abstraction.
3
b) as long as the intended specification remains unambiguous the lowest
number of markers (see above) should be used.
Since for many hydrocarbon and heterocyclic parent structures traditional designations are retained, priorities according to the principle of
lowest locants and lowest numbers are not always strictly obeyed. In such
cases seniorities were assigned more or less arbitrarily.
Since the IUPAC nomenclature system relies totally on the pivotal concept of the "parent structure" to which, in a second sphere, substituents are
assigned, it appeared advisable to maintain this division also for the chapters of this book. Thus, we begin with the exposition of the nomenclature
rules for parent structures and, in the second chapter, proceed with the discussion of the different types of nomenclature for substituted systems,
radicals, and ions; in the third chapter specific classes of functional compounds are addressed, followed, in the forth chapter, by the treatment of
metal organyls and, in the fifth, of carbohydrates. The concluding sixth
chapter takes up once again the construction of the final names of
complex compounds including isotopic modifiers and stereochemical
descriptors.
To derive maximum benefit from this book, several technical points
should be noted before embarking on its use. To avoid confusion, the term
"radical", formerly also used for molecular fragments with pending
valences, will now only be employed to designate factual, physical radicals.
For nomenclature purposes this term is replaced by the expression "substituent group". Priority criteria are applied successively - when a foregoing criterion is not conclusive, the next one comes into force. The use of
hyphens sometimes appears quite arbitrary; if it promotes clarity liberal
use thereof might be justified. The examples given are taken from recent
research reports or have been devised in such a way that they cover the pertinent rules as completely as possible. If older systematic names are still in
use they are considered as "traditional names". The same holds for trivial
names in widespread use. When deviations of Chern. Abstr. names from
IUPAC names are to be emphasized this will also be duly indicated. In
order to familiarize the reader with the extraordinary flexibility of the
chemical formula- and sign-language the formula drawings deliberately
display the whole spectrum of the graphic possibilities of abstraction.