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1.#Modifications#de#chaîne#
 !"#$%&'("#$%')*+",#$-#./$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
0/)#$12",'2)#3$)'425,#3$+.$$$$$$$$$$$$$$$$$$$$$$$$$$$$
%6%127.#8$
 911#$#:/$:'/.),#$:2$#11#$"#$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
%+"/2#"/$7.#$;#:$12'2:+":$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
:24-1#:8$
 911#$#:/$2":'/.),#$:2$#11#$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
%+"/2#"/$'.$4+2":$."#$12'2:+"$;+.*1#8$

 <#:$),'%/2+":$:.*2#:$-')$1#:$4+1,%.1#:$
+)='"27.#:$-#.>#"/$24-127.#)$;#:$4+;25%'/2+":$
;#$1'$%&'("#$%')*+",#3$:+2/$
'?$@>#%$%+":#)>'/2+"$;.$"+4*)#$;A'/+4#:$;#$
%')*+"#$
*?$@>#%$;242"./2+"$;.$"+4*)#$;A'/+4#:$;#$
%')*+"#$
%?$@>#%$'.=4#"/'/2+"$;.$"+4*)#$;A'/+4#:$;#$
%')*+"#$

a)#Modification#de#la#chaîne#avec#
conservation#du#nombre#d’atomes#de#
carbone#
$$$$BA#:/$1#$/6-#$;#$%&'("#$7.2$#:/$'1+):$4+;25,8$
C')$#D#4-1#3$;'":$1A2";.:/)2#$-,/)+12E)#3$1#$
)#F+)4'=#$-#)4#/$;A+*/#"2)3$G$-')/2)$
;A&6;)+%')*.)#:$1,=#):$#/$:'/.),:3$G$-)#::2+"$
#/$/#4-,)'/.)#$,1#>,#:$'>#%$%'/'16:#.)3$;#:$
#::#"%#:$-1.:$-#)F+)4'"/#:$H4+1,%.1#:$
)'425,#:3$2":'/.),#:?3$;#:$;,)2>,:$%6%127.#:$
#/$;.$;2&6;)+=E"#8$I)+2:$/6-#:$;#$),'%/2+":$
-#.>#"/$'>+2)$12#.$J$1A2:+4,)2:'/2+"3$1'$
;,:&6;)+=,"'/2+"3$#/$1'$%6%12:'/2+"8$

Exemples##
!"$&6;)+%')*.)#$:'/.),$$
H'1%'"#$12",'2)#?$#:/$$
/)'":F+)4,$#"$."$;#$:#:$$
2:+4E)#:$)'425,:8$$
!"$'1%'"#$:'/.),$#:/$$
/)'":F+)4,$#"$'1%E"#$$
'>#%$F+)4'/2+"$;#$$
;2&6;)+=E"#$$$
$$$$$!"$'1%'"#$12",'2)#$#:/$/)'":F+)4,$#"$%6%1'"#$'>#%$F+)4'/2+"$;#$
;2&6;)+=E"#$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$