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![[Post New]](/templates/default/images/icon_minipost_new.gif) 19 Apr 2008 20:57:05 IST
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when does ring expansion takes place in a cyclic aliphatic compounds?
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20 Apr 2008 11:27:43 IST
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Ring expansion takes place when the entropy change is favourable. Mostly, if a more stable cation(20 or 30) or if a more stable ring is formed, then ring expansion takes place, like from 4-membered ring to more stable 5-membered ring.
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-Ramya |
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20 Apr 2008 21:20:13 IST
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Good answer ramya. Well done
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Krishna Gopal Singh
B.Tech Chemical Engg
IIT Delhi 2002
Currently doing PhD from IIT Delhi |
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22 Apr 2008 18:38:46 IST
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ring exp takes place for acquiring stability to the ring compound, no matter it isan alkane, or alkene, etc..
stability of cation is of the order: tert>sec>pri carbocation.
whenever there is a chance to form a more stable c-cation,
the existing bond breaks at a point thereby forming a c-cation there, and the electron finds room nd attaches to another c-atom...
i just entered into my XII th and im a learner, i have shared my knowledge.Viewers, if m y explanation was not apt, plz give me the right one.
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