標題: Bond angle [打印本頁] 作者: -終場ソ使者- 時間: 9-11-2009 20:21 標題: Bond angle 今日呀sir問我地
What is the bond angle of H[sub]2[/sub]O and NH[sub]3[/sub]?Why?
點解?我有考慮過好多因素,但都唔知點解-.-作者: kokokokokakuz11 時間: 9-11-2009 20:42
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H[sub]2[/sub]O
O
/ \
H H
中間隻角幾多度-.-
∠H-O-H
我知係104.5',不過唔知點解作者: kokokokokakuz11 時間: 9-11-2009 21:16
提示: 作者被禁止或刪除 內容自動屏蔽作者: -終場ソ使者- 時間: 9-11-2009 21:58
我就係想知點計-.-作者: kokokokokakuz11 時間: 9-11-2009 22:07
提示: 作者被禁止或刪除 內容自動屏蔽作者: -終場ソ使者- 時間: 10-11-2009 21:10
其實個principle我知,
In CH4 cause,
δ-俾個proton(form hydrogen)搶左,
bond pairs electrons之間既repulsive force細左
角度比較大
In NH3 cause,
δ-"還番"俾佢,bond pairs electrons既repulsive force大左
bond angle較細
唔知岩唔岩,自己諗
就係唔知點計-.-
YU兄,幫幫手[[tk_32]]作者: paladin 時間: 9-11-2011 20:17
to be exact, you need mathematical model to calculate the lowest energy form of a certain molecule.
for the principle, the key is to consider the fact that bonding electron pair is less diffused than lone pair, and lone pair exerts greater replusive force than bonding pair, resulting in lesser bond angle in H2O than NH3, in turn, lesser than that in CH4.