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mono- 30 triaconta- 2 di- 31 hentriaconta- 3 tri- 32 dotriaconta- 4 tetra- 33 tritriaconta- 5 penta- 34 tetratriaconta- 6 hexa- 40 tetraconta- 7 hepta- 50 pentaconta- 8 octa- 60 hexaconta- 9 nona- 70 heptaconta- 10 deca- 80 octaconta- 11 undeca- 90 nonaconta- 12 dodeca- 100 hecta- 13 trideca- 200 dicta- 14 tetradeca- 300 tricta- 15 pentadeca- 400
In the following prefixes, a final vowel is normally dropped before a root that begins with a vowel, with the exceptions of bi-, which is extended to bis-before a vowel; among the other monosyllables, du-, di-, dvi-, and tri-, never vary.
Numbering of the various substituents and bonds with their locants. If there is more than one of the same type of substituent/double bond, a prefix is added showing how many there are (di – 2, tri – 3, tetra – 4, then as for the number of carbons below with 'a' added at the end)
The names "caffeine" and "3,7-dihydro-1,3,7-trimethyl-1H-purine-2,6-dione" both signify the same chemical compound.The systematic name encodes the structure and composition of the caffeine molecule in some detail, and provides an unambiguous reference to this compound, whereas the name "caffeine" simply names it.
In this case the number n (which is between 1 and 6) is indicated by a multiplier prefix (mono-, di-, tri-, tetra-, penta-, or hexa-). The unqualified term "hydroxynaphthoquinone" usually means a derivative of 1,4-naphthoquinone .
The central atom name(s) come after the ligands. Where there is more than one central atom it is preceded by di- tri-, tetra- etc. Os 3 (CO) 12, dodecacarbonyltriosmium; Where there are different central atoms they are sequenced using the electronegativity list. [ReCo(CO) 9] nonacarbonylrheniumcobalt
Chemical nomenclature is a set of rules to generate systematic names for chemical compounds.The nomenclature used most frequently worldwide is the one created and developed by the International Union of Pure and Applied Chemistry (IUPAC).
In this case the number n (which is between 1 and 4) is indicated by a multiplier prefix (mono-, di-, tri-, tetra-, penta-, or hexa-). The unqualified term "hydroxybenzoquinone" usually means a derivative of 1,4-benzoquinone. Other hydroxy- compounds can be derived from the other isomer, namely 1,2-benzoquinone or ortho-benzoquinone.