问题：谁知道2-氯-4-硝基苯酚的沸点
类型：求助 (悬赏分:3分)
提问：qfenzhu
等级：▲
版块：有机化学问题(jimuwei,fpcwin1211,netpanda,yjgzfl,Ftian,)
信誉：44%
回复：5
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时间：2005-04-14 09:04:37 编辑加入/取消收藏订制/取消短消息举报该贴

谁知道2-氯-4-硝基苯酚的沸点谁知道2-氯-4-硝基苯酚的沸点谁知道2-氯-4-硝基苯酚的沸点谁知道2-氯-4-硝基苯酚的沸点

回复人：sara,▲ (每天进步一点点) 时间：2005-04-15 06:20:52 编辑

1楼

From: http://web.pdx.edu/~lutzr/acids_bases.doc
The strength of an acid or base refers to its effectiveness as a proton donor or acceptor, respectively. Effectiveness can be expressed in more than one way. For example, the strength of an acid could be taken as a reflection of how fast proton transfer occurs to a given reference base. Proton transfer rates, although usually very fast, can be measured, and rate constants for many acids are available. This kind of quantitative measure of acid strength is called kinetic acidity.

It is more common, however, to express acidity another way, and that is to determine the extent to which the acid has protonated a reference base after equilibrium has been achieved. Water is always the reference base in order to maintain consistency in comparing acids. For a strong acid, for example HCl above, the equilibrium lies far to the right and there is little molecular HCl present at equilibrium. For a weak acid, the equilibrium lies to the left. To ”put a number on it”, the equilibrium constant can be measured and used as an expression of acid strength. This is called equilibrium acidity or thermodynamic acidity.

回复人：sara,▲ (每天进步一点点) 时间：2005-04-15 06:39:31 编辑	2楼
Shame. Sorry, I made a mistake.

回复人：qfenzhu,▲ () 时间：2005-04-15 08:16:13 编辑	3楼
All right!! Thanks!!!

回复人：sara,▲ (每天进步一点点) 时间：2005-04-15 08:25:02 编辑	4楼
hehe。我从sigmaaldrich公司看了一下，熔点是105-106 °C。那么常温下沸点肯定很高。估计能查到的沸点是高真空下的数值。具体要去查制备这个化合物的原始文献。

回复人：qfenzhu,▲ () 时间：2005-04-15 12:33:24 编辑	5楼
我在这查不了原始文献,你能帮忙查一下吗? 谢谢!!!!

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