Ch_322a_4.09 - yne CH 3 C CCH 3 2-but yne(4 Positions of...

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IUPAC Names of Alkynes Alkynes are named in a similar way as alkenes. (1) The name of the parent alkane is modified by dropping the "ane" ending and adding "yne." (2) The parent chain is numbered to give the carbons of the alkyne lower numbers . (3) The location of the triple bond is given by the lower positional number of the alkynyl carbons. CH 3 CH 2 CH 2 C CH 5 4 3 2 1 1 -pent
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Unformatted text preview: yne CH 3 C CCH 3 2-but yne (4) Positions of substituents are determined by the usual rules. CH 3 C CCH 2 Cl 4 3 2 1 1-chloro-2-butyne CH 3 CH 2 CHC CH CH 3 5 4 3 2 1 3-methyl-1-pentyne (5) In an alkynol , the alcohol has priority in numbering. HC CCH 2 CH 2 OH 4 3 2 1 3-butyn-1-ol 1-Alkynes are also called terminal alkynes . R-C C H pK a = 25...
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