Portmess Homework Solutions 43

Portmess Homework Solutions 43 - 12 n 1 1(2 n 1 2) 5 254 14...

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( e g ) The functional groups that characterize alcohols, thiols, and carboxylic acids are G OH, G SH, and G CO 2 H, respectively. The structures of serine, cysteine, and aspartic acid are: 2.30 Uscharidin has the structure shown. ( a ) There are two alcohol groups, one aldehyde group, one ketone group, and one ester functionality. ( b ) Uscharidin contains ten methylene groups (CH 2 ). They are indicated in the structure by small squares. ( c ) The primary carbons in uscharidin are the carbons of the two methyl groups. 2.31 ( a ) Methylene groups are G CH 2 G . ClCH 2 CH 2 CH 2 CH 2 Cl is therefore the C 4 H 8 Cl 2 isomer in which all the carbons belong to methylene groups. ( b ) The C 4 H 8 Cl 2 isomers that lack methylene groups are (CH 3 ) 2 CHCHCl 2 and 2.32 Since it is an alkane, the sex attractant of the tiger moth has a molecular formula of C n H 2 n 1 2 . The number of carbons and hydrogens may be calculated from its molecular weight.
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Unformatted text preview: 12 n 1 1(2 n 1 2) 5 254 14 n 5 252 n 5 18 The molecular formula of the alkane is C 18 H 38 . In the problem it is stated that the sex attractant is a 2-methyl-branched alkane. It is therefore 2-methylheptadecane, (CH 3 ) 2 CHCH 2 (CH 2 ) 13 CH 3 . 2.33 When any hydrocarbon is burned in air, the products of combustion are carbon dioxide and water. CH 3 (CH 2 ) 8 CH 3 1 O 2 ( a ) 31 2 Decane (C 10 H 22 ) Oxygen 10CO 2 1 11H 2 O Carbon dioxide Water CH 3 CHCHCH 3 Cl Cl O O O O O H 3 C OH H H H CH H H H CH 3 OH O O Alcohol group Ketone group Primary carbon Aldehyde group Primary carbon Alcohol group Ester group HOCH 2 CHCO 2 1 NH 3 O Serine HSCH 2 CHCO 2 1 NH 3 O Cysteine HOCCH 2 CHCO 2 1 NH 3 O O Aspartic acid ALKANES 37...
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This note was uploaded on 09/20/2011 for the course CHM 2210 taught by Professor Reynolds during the Fall '01 term at University of Florida.

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