Organic chem 入來指指教教一下~~~~~~~~~~^_^~~~~~~~~~~~~~~

samson2020

Organic chem 入來指指教教一下

請問substitution 同addition系唔系redox reaction??
如果系,咁系oxidization定系reduction??

jacky2580

例:
CH2=CH2 + Br2  --->  CH2BrCH2Br  呢個係addition

C2H6 + Br2  ---> C2H5Br + HBr  呢個係subs

兩個 Br都被reduce

[ 本帖最後由 jacky2580 於 27-4-2008 17:36 編輯 ]

Zend

substitution
CH4+Cl2-->CH3Cl+HCl
0 -> -1
(of coz, u may regard it as oxidation)
addition
上面有, 都係involve e transfer + change in OA of species .

piyopiyo

dunno for addition...
but substitution...
CH4 + Br2--->CH3Br + HBr...
which is a redox

samson2020

我打一條pastpaper出黎
year 94 mc Q45
1st statement: butane can immediately decolourize bromine
2nd statement: butane can be oxidized by bromine

ans: D( both statement are wrong)

咁姐系點=.=....
既然bromine系reduce左咁butane咪姐系oxidized左lo??但系又錯wo

piyopiyo

原帖由 samson2020 於 27-4-2008 17:49 發表
我打一條pastpaper出黎
year 94 mc Q45
1st statement: butane can immediately decolourize bromine
2nd statement: butane can be oxidized by bromine

ans: D( both statement are wrong)

咁姐系點=.=.. ...

係咪因為要 bromine in 1-1-1,trichloroethane ar[[tk_02]]

Zend

under sun light
under sun light

samson2020

下....咁冇sunlight個reaction系slow姐...唔代表唔得ga wa
佢話"can be",真系搞到頭都大埋

Puppet

原帖由 samson2020 於 27-4-2008 17:59 發表
下....咁冇sunlight個reaction系slow姐...唔代表唔得ga wa
佢話"can be",真系搞到頭都大埋

冇sunlight代表唔得

jackiema

1) 唔係 immediate reaction
under sunlight 都係好慢
冇 sunlight / UV light ---> no reaction

2)
Redox... 這個真的不知道... -_-

[ 本帖最後由 jackiema 於 27-4-2008 18:37 編輯 ]