05 - Handout#4 5.12 Spring 2003 Alkanes Nomenclature and...

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Handout #4, 5.12 Spring 2003, 2/14/02± Alkanes: Nomenclature and Conformational Analysis± Formula (C n H 2n+2 ) Name n -Alkane Substituent Name # Constitutional n -Alkyl Isomers CH 4 methane –CH 3 (–Me) methyl 1 C 2 H 6 ethane –C 2 H 5 (–Et) ethyl 1 C 3 H 8 propane –C 3 H 7 (– n Pr) propyl 1 C 4 H 10 butane –C 4 H 9 (– n Bu) butyl 2 C 5 H 12 pentane –C 5 H 11 pentyl 3 C 6 H 14 hexane –C 6 H 13 hexyl 5 C 7 H 16 heptane –C 7 H 15 heptyl 9 C 8 H 18 octane –C 8 H 17 octyl 18 C 9 H 20 nonane –C 9 H 19 nonyl etc. C 10 H 22 decane –C 10 H 21 decyl C 11 H 24 undecane –C 11 H 23 undecyl C 12 H 26 dodecane –C 12 H 25 dodecyl C 13 H 28 tridecane –C 13 H 27 tridecyl C 14 H 30 tetradecane –C 14 H 29 tetradecyl C 15 H 32 pentadecane –C 15 H 31 pentadecyl Me CH 3 Et CH 3 n Pr CH 3 i Pr CH 3 CH 3 n Bu CH 3 s Bu CH 3 CH 3 CH 3 H 3 C CH 3 methyl- ethyl- n -propyl- iso -propyl- (1-methylethyl-) t Bu CH 3 H 3 C CH 3 n -butyl- iso -butyl- (2-methylpropyl-) tert -butyl- (1,1-dimethylethyl-) neopentyl- (2,2-dimethylpropyl) C o n s t i t u t i o n a l I s o m e r s (Be able to recognize these common fragments.) 1 2 1 1 1 2 3 2 2 3 s Bu CH 3 sec -butyl-
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