5698231 2010-7-28 09:30 PM
(chem) bond angles
書度就話a=180度
b=109.5度
c=120度
d=120度..
我覺得a,b,c都應該岩..
但點解d係120度?係咪書錯?[draw]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[/draw]
[[i] 本帖最後由 5698231 於 2010-7-28 09:33 PM 編輯 [/i]]
hinokari 2010-7-28 09:41 PM
[draw]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[/draw]
5698231 2010-7-28 09:44 PM
-0-雖然我都估到係因為ethene果個120度..
但書度畫既係圍住個double bond..攪到好似180度咁
原來都當係果個120度?
hinokari 2010-7-28 09:56 PM
Angle in st. line =180* while in Eucliedean.......
36661124 2010-7-28 09:56 PM
[quote]原帖由 [i]5698231[/i] 於 2010-7-28 09:44 PM 發表 [url=http://lsforum.net/board/redirect.php?goto=findpost&pid=2267973&ptid=145879][img]http://lsforum.net/board/images/common/back.gif[/img][/url]
-0-雖然我都估到係因為ethene果個120度..
但書度畫既係圍住個double bond..攪到好似180度咁
原來都當係果個120度? [/quote]
如唔係咁 咁點陰人;P
5698231 2010-7-28 10:02 PM
ok...thanks for explanation=]
睇黎organic chem會用多好多時間學先明- -
桃子 2010-7-28 10:09 PM
[quote]原帖由 [i]5698231[/i] 於 2010-7-28 09:44 PM 發表 [url=http://lsforum.net/board/redirect.php?goto=findpost&pid=2267973&ptid=145879][img]http://lsforum.net/board/images/common/back.gif[/img][/url]
-0-雖然我都估到係因為ethene果個120度..
但書度畫既係圍住個double bond..攪到好似180度咁
原來都當係果個120度? [/quote]
The given diagram is not a 3D structure.
It's just a simplified representation.
kctsui75 2010-7-29 01:32 AM
準確的來說：The H-C-H [url=/wiki/Angle][color=#0645ad]angle[/color][/url] is about 119°, smaller than the 120° for ideal sp² [url=/wiki/Hybridization_(chemistry)][color=#0645ad]hybridized[/color][/url] carbon.
The H-C=C [url=/wiki/Angle][color=#0645ad]angle[/color][/url] is about 121°.
火柴 2010-7-29 08:42 AM
簡單來說, bond angle 取決於hybridization status