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ouyanghao44

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Since Fluorine is so electronegative and powerful inductive electron withdrawing substituent,it makes successive Chlorines worse donors to the Lewis Acid Catalyst,hence halogen exchange becomes progressively difficult.
There is also a decrease in steric assistance to ionization as each larger chlorine is replace by a smaller fluorine.

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Uniaxial

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sltmac: ½ð±Ò+1 2013-03-06 09:20:36
phu_grassman: ½ð±Ò+2, thanks 2013-03-07 18:10:46
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2Â¥2013-03-05 22:57:57
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zjju44

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2Â¥: Originally posted by Uniaxial at 2013-03-05 22:57:57
Fluorine is so electronegative and a powerful inductive electron withdrawing substituent£¬ it makes successive Chlorines worse donors to the Lewis Acid catalyst SbF5
·­Ò룺·ú¾ßÓÐÈç´ËÇ¿µÄµç¸ºÐÔͬʱҲ ...

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3Â¥2013-03-06 09:02:11
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duxinghao

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phu_grassman: ½ð±Ò+1, thanks 2013-03-07 18:11:00
Fluorine is so electronegative and a powerful inductive electron withdrawing substituent£¬ it makes successive Chlorines worse donors to the Lewis Acid catalyst SbF5

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4Â¥2013-03-07 00:50:33
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ouyanghao44

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ÒýÓûØÌû:
4Â¥: Originally posted by duxinghao at 2013-03-07 00:50:33
Fluorine is so electronegative and a powerful inductive electron withdrawing substituent£¬ it makes successive Chlorines worse donors to the Lewis Acid catalyst SbF5

·ú¾ßÓкÜÇ¿µÄµç¸ºÐÔͬʱҲÊÇÇ¿Îü ...

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5Â¥2013-03-07 09:10:25
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hanches

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obscure nacissus

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ouyanghao44: ½ð±Ò+24, ·­ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, ·­ÒëµÃ·Ç³£ºÃ£¬Ð»Ð» 2013-03-08 14:29:50
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