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[biostudent101]

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can someone please explain in regards to nucleophiles(nucleophiles decrease in the order: RO->HO->RCO2>ROH>H2O

in regards to size and polarity
nucleophile strength decreases in the order:

CN->I->RO->HO->Br_>Cl->F->H2O

what is the reasoning behind it??
thanks in advance!!!

 

[Danny289]

can someone please explain in regards to nucleophiles(nucleophiles decrease in the order: RO->HO->RCO2>ROH>H2O

in regards to size and polarity
nucleophile strength decreases in the order:

CN->I->RO->HO->Br_>Cl->F->H2O

what is the reasoning behind it??
thanks in advance!!!

what is definitaion behind nuclophility?

 

[Sublimation]

can someone please explain in regards to nucleophiles(nucleophiles decrease in the order: RO->HO->RCO2>ROH>H2O

in regards to size and polarity <<Thats ur answer right there
nucleophile strength decreases in the order:

CN->I->RO->HO->Br_>Cl->F->H2O

what is the reasoning behind it??
thanks in advance!!!

Its the affinity of the nuc. to seek a nucleus and its also due to its polarizability, in other words it depends on how easy it is to polarize.

 

[adizzle87]

Here are some simple rules:
1) Generally speaking a negative molecule is more nucleophilic than a neutral one. For example EtO- is more nucleophilic than EtOH, OH- more than H2O, etc
2) When comparing nucleophiles in the same group (e.g. Group 7 like the halogens) the bigger it is, the better of a nucleophile it is. The reason for this is that their electron cloud is much bigger and so they can manipulate it more easily to accomodate bonding (I know this explanation sucks, but OChem as a Second Language covers this really really well)

On the DAT that probably won't ask you to rank them in that much detail. They're more likely to ask which is more nucleophilic, with the answer choices being obvious like Cl-, Br-, H2O etc

 

[biostudent101]

adizzle87, i understand what u are saying but just for my own knowledge why or how can u tell by using the periodic table that CN- which not there is greater than for example RO-?
thanks in advance