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Dolbier HW Solutions 414 - 508 CARBOXYLIC ACIDS(d Undecane...

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( d ) Undecane is the unbranched alkane with 11 carbon atoms, undecanoic acid is the correspond- ing carboxylic acid, and undecenoic acid is an 11-carbon carboxylic acid that contains a double bond. Because the carbon chain is numbered beginning with the carboxyl group, 10-undecenoic acid has its double bond at the opposite end of the chain from the carboxyl group. ( e ) Mevalonic acid has a fi ve-carbon chain with hydroxyl groups at C-3 and C-5, along with a methyl group at C-3. ( f ) The constitution represented by the systematic name 2-methyl-2-butenoic acid gives rise to two stereoisomers. Tiglic acid is the E isomer, and the Z isomer is known as angelic acid. The higher ranked sub- stituents, methyl and carboxyl, are placed on opposite sides of the double bond in tiglic acid and on the same side in angelic acid. ( g ) Butanedioic acid is a four-carbon chain in which both terminal carbons are carboxylic acid
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