HF 嘅crystal structure就係 zigzag shape 啦...
即係話 F 佢用左 1 lone pair 黎到 form hydrogen bond ...
我唔明 F 有 3 lone pairs ,, 點解 F 淨係用 1 lone pair 呢??
thanks
chem bonding (hydrogen bond)
2010-02-01 1:21 am
回答 (2)
2010-02-01 3:56 am
✔ 最佳答案
Each HF contains one F atom of one H atom. Each F atom can form at most 3 hydrogen bonds, but each H can form only one hydrogen bond. If an F atom form 3 hydrogen bonds with 3 H atoms, there will be 2 F atoms in 2 other HF molecules do not form hydrogen bond. This is energy unfavoured.
2010-02-11 4:31 pm
It is because when the fluorine atom bond to one more hydrogen through the hydrogen bond, there may have a large electron density within that region and may result in a large replusion and cause the bond to break.
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