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The longest possible main alkane chain is used; therefore 3-ethyl-4-methylhexane instead of 2,3-diethylpentane, even though these describe equivalent structures. The di-, tri- etc. prefixes are ignored for the purpose of alphabetical ordering of side chains (e.g. 3-ethyl-2,4-dimethylpentane, not 2,4-dimethyl-3-ethylpentane).
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2,2,3,3-Tetramethylbutane Index of chemical compounds with the same molecular formula This set index page lists chemical structure articles associated with the same molecular formula .
3-Ethyl-3-methylhexane; 3-Ethyl-4-methylhexane; Pentane. Isomers where pentane is the longest chain Tetramethyl. 2,2,3,3-Tetramethylpentane;
2,5-Dimethylhexane; 3,3-Dimethylhexane; 3,4-Dimethylhexane [Wikidata This page was last edited on 27 April 2022, at 16:52 (UTC). Text is available under the ...
This is the list of the 802 isomers of tridecane, with their IUPAC names. Straight-chain. Tridecane; With dodecane backbone ... 4-Ethyl-3,5,6-trimethyloctane;
N-octane has 23 constitutional isomers. 8 of these isomers have one stereocenter; 3 of them have two stereocenters. (3S,4S)-3,4-Dimethylhexane (top left) and (3R,4R)-3,4-Dimethylhexane (top right) are non-superimposable mirror images, so they are chiral enantiomers.
The numbers are included in the name to avoid ambiguity about the position of the groups, and "tri" indicates that there are three identical methyl groups. If one of the methyl groups attached to the third carbon atom were instead an ethyl group, then the name would be 3-ethyl-2,3-dimethylpentane.