HF has three lone pair of electrons, but why one HF molecule can only form one hydrogen bond per molecule in zig-zag shape?
In contrast, H2O molecule have two lone pair of electrons, but it can form two hydrogen bond per molecule?
why there is only one H-bond in HF?
2007-03-12 9:59 am
回答 (1)
2007-03-12 10:43 am
✔ 最佳答案
唔係剩係計lone pair, 你都要計番佢有幾多個hydrogen atom bonded with high electronegative atom例如HF -- 三個lone pair, 一個H atom, 咁limiting factor 就去左H atom 0既數目度. 可以average 有一個H-BOND (二除二, 即係左右各一個H BOND)
至於H2O 呢, O 有兩個lone pair, 但係又有兩個H atom, 咁二對二咪可以average 有兩個H-BOND (四除二, tetrahedral shape 呀)
參考: 我係老師
收錄日期: 2021-04-13 17:51:36
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