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27 Jun 2008 18:47:04 IST

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WHICH OF THE FOLLOWING IS HE STRONGEST NUCLEOPHILE - SO3, ROR, RNH2

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WHICH OF THE FOLLOWING IS HE STRONGEST NUCLEOPHILE - SO3, ROR, RNH2

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Halo

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27 Jun 2008 19:51:55 IST

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is it RNH2

Gaurav Sood

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27 Jun 2008 22:35:30 IST

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it must be ROR as the +I effect of both the alkyl gps increase the electron density on oxygen to a considerable extent...

Madhusudan Chavan

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28 Jun 2008 18:06:38 IST

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SO3 is an electrophile hence it cannot be considered as nucleophile.

Nucleophilicity decreases with increasing electronegativity of the attacking atom. Hence the order would be RNH2 >ROR

Gaurav Sood

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28 Jun 2008 22:58:39 IST

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i may be wrong, but could u please explain why the order of nucleophilicity decreases with increasing electronegativity of the attacking atom....

aNdRoMeDa

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29 Jun 2008 00:43:59 IST

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nuecleophilicity decreses wid increasin elctronegativity of d attckin atom

coz if d atom is more elctronegative then it will nt easily give away itz elctrons thus they wud b bonded by a strong force to d nucleus

nuecleophilicity decreses wid increasin elctronegativity of d attckin atom

Gaurav Sood

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29 Jun 2008 18:40:42 IST

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thanx for explaining....

biswarup

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30 Jun 2008 17:43:32 IST

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i do think it should be NH2.+m effect depends on Electronegativity only for elements of same period.got it you dumbheads.

ARPIT

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4 Jul 2008 12:35:39 IST

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please explain there is presence of two lone pair in oxygen while only one in nitrogen

esha

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4 Jul 2008 15:19:05 IST

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ROR is the most nucleophilic among the three. as the 2 electron donating alkyl groups increase electron density on O-atom so it can easily donate its lone pair of electrons to an electrophile.
In case of RNH2 Only one alkyl group is present so electron density in this case dose not increase to much extent. so it is a weak nucleophile than ROR.
in SO3 both S and O atom r electronegative, so it should be the weakest among the three

pk kc

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5 Jul 2008 11:46:28 IST

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i htink ror is the more nucleophilic coz it has got +i effect which would increase the electron density

nd it will be able to attack more easily the electrophile.

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