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#1 Posted 8:39pm 02-03-10 dbt org..hoffman[image]43042562.jpg[/image] |
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#2 Posted 8:42pm 02-03-10 Re: dbt org..hoffmanc,d?? not fully sure
Edited on 8:44pm 02-03-10 |
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#3 Posted 8:44pm 02-03-10 Re: dbt org..hoffmanb,d?
The road never ends. Its you who lose your sight. |
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#4 Posted 9:02pm 02-03-10 Re: dbt org..hoffmanI dont think b. Definitely D. What about a and C?
Madhu |
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#5 Posted 10:18pm 02-03-10 Re: dbt org..hoffmanYes C) is Hoffmann elimination. In C), loss of beta hydrogen occurs from least hindered area. C, D for sure.
Self belief is such a peculiar thing. As long as you have it, nothing can stop you, you feel invulnerable. But once it's gone, nothing can bring you up from the "I'm-useless" state you end up in. Edited on 10:18pm 02-03-10 |
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#6 Posted 11:23pm 02-03-10 Re: dbt org..hoffmanans given is a,c,d [7][12] i marked only c,d [2]
Edited on 11:23pm 02-03-10 |
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#7 Posted 11:25pm 02-03-10 Re: dbt org..hoffmanA) mein Hoffmann too? Oooo...I get it! Ester pyrolysis...of course its Hoffmann elimination! OAc likha tha so I didnt realise :D
Self belief is such a peculiar thing. As long as you have it, nothing can stop you, you feel invulnerable. But once it's gone, nothing can bring you up from the "I'm-useless" state you end up in. |
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#8 Posted 11:28pm 02-03-10 Re: dbt org..hoffmanEster pyrolysis ....[12] is it similar to cope elimination then ?? |
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#9 Posted 11:32pm 02-03-10 Re: dbt org..hoffmanYes. By hydrogen bonding, a beta hydrogen syn to the double bonded oxygen forces an elimination in presence of heat.
Self belief is such a peculiar thing. As long as you have it, nothing can stop you, you feel invulnerable. But once it's gone, nothing can bring you up from the "I'm-useless" state you end up in. |
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#10 Posted 11:33pm 02-03-10 Re: dbt org..hoffmankk..thx all..and especially pritish. [1] |
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#11 Posted 11:34pm 02-03-10 Re: dbt org..hoffmanAnd ya one more thing...notice that CH[ss]3[/ss] is attached to the beta carbon left of OAc...by Hoffmann rule, that beta hydrogen will be avoided. The beta hydrogens below will be used!
Self belief is such a peculiar thing. As long as you have it, nothing can stop you, you feel invulnerable. But once it's gone, nothing can bring you up from the "I'm-useless" state you end up in. Edited on 11:34pm 02-03-10 |
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#12 Posted 08:16am 03-03-10 Re: dbt org..hoffmandidnt get u.....can u point it out with a figure ??? plzz |
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#13 Posted 10:16pm 04-03-10 Re: dbt org..hoffman[image]43221160.jpg[/image]
Self belief is such a peculiar thing. As long as you have it, nothing can stop you, you feel invulnerable. But once it's gone, nothing can bring you up from the "I'm-useless" state you end up in. |
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#14 Posted 08:52am 05-03-10 Re: dbt org..hoffmanthnks pritish i got it too.
In every loss, in every lie, in every truth that you'd deny
And each regret and each goodbye was a mistake too great to hide
And your voice was all I heard that I get what I deserve
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#15 Posted 09:24am 05-03-10 Re: dbt org..hoffmanthx again bro.. |
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