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Chemical nomenclature however (with IUPAC nomenclature as the best example) is necessarily more restrictive: Its purpose is to standardize communication and practice so that, when a chemical term is used it has a fixed meaning relating to chemical structure, thereby giving insights into chemical properties and derived molecular functions. These ...
International Nomenclature of Cosmetic Ingredients; International Union of Biochemistry and Molecular Biology; International Union of Pure and Applied Chemistry; IUPAC Color Books; IUPAC Inorganic Chemistry Division; IUPAC nomenclature for organic chemical transformations; IUPAC nomenclature of inorganic chemistry; IUPAC nomenclature of ...
IUPAC nomenclature is used for the naming of chemical compounds, based on their chemical composition and their structure. [1] For example, one can deduce that 1-chloropropane has a Chlorine atom on the first carbon in the 3-carbon propane chain.
For example, (CH 3) 2 CHCH 2 CH 3 (isopentane) is named 2-methylbutane, not 3-methylbutane. If there are multiple side-branches of the same size alkyl group, their positions are separated by commas and the group prefixed with multiplier prefixes depending on the number of branches. For example, C(CH 3) 4 (neopentane) is named 2,2 ...
Multiplicative nomenclature is to be preferred over simple substitutive if it can be used. This is the nomenclature with an apostrophe after numbers such as 4'; it allows multiple occurrences of the principal characteristic group or compound class to be treated together. Example: 4,4′-sulfanediyldibenzoic acid refers to (COOH-C 6 H 4) 2 S.
A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.
For example, in the CAS scheme "group VIIB" denotes manganese group (group 7), while in the old IUPAC scheme it denotes halogen group (group 17). If they are used at all, context should clarify (disambiguate) into the 1–18 numbering. Care should be taken when translating old sources that use this nomenclature to modern terminology.
In chemistry, a systematic name describes the chemical structure of a chemical substance, thus giving some information about its chemical properties.. The Compendium of Chemical Terminology published by the IUPAC defines systematic name as "a name composed wholly of specially coined or selected syllables, with or without numerical prefixes; e.g. pentane, oxazole."