Aqa chemistry - difference between nucleophilic and electrophilic?
Can anyone tell me how I can distinguish between them because I found myself guessing when asked to name a mechanism .. Thanks (A2 CHEM)
(edited 7 years ago)
Nucleophillic - attracted to positive charge.
Electrophillic - attracted to negative charge.
To distinguish between them, try:
> Drawing out the mechanism
> Labelling delta +ve atoms (i.e. C in C=O)
> See which atom/bond the attacking species targets.
General rules:
> Nucleophilles will attack atoms (mainly C).
> Electrophilles will attack lone pairs, double bonds and benzene.
Common nucleophilles: Cl-, NH3 (N has a lone pair, so will seek +ve),
Common electrophilles: RC=O (+ve C seeks -ve charge), H+ (positive so will seek -ve charge)
Good luck! :-)
Electrophillic - attracted to negative charge.
To distinguish between them, try:
> Drawing out the mechanism
> Labelling delta +ve atoms (i.e. C in C=O)
> See which atom/bond the attacking species targets.
General rules:
> Nucleophilles will attack atoms (mainly C).
> Electrophilles will attack lone pairs, double bonds and benzene.
Common nucleophilles: Cl-, NH3 (N has a lone pair, so will seek +ve),
Common electrophilles: RC=O (+ve C seeks -ve charge), H+ (positive so will seek -ve charge)
Good luck! :-)
(edited 7 years ago)
Original post by akaDirewolf
Nucleophillic - attracted to positive charge.
Electrophillic - attracted to negative charge.
To distinguish between them, try:
> Drawing out the mechanism
> Labelling delta +ve atoms (i.e. C in C=O)
> See which atom/bond the attacking species targets.
General rules:
> Nucleophilles will attack atoms (mainly C).
> Electrophilles will attack lone pairs, double bonds and benzene.
Common nucleophilles: Cl-, NH3 (N has a lone pair, so will seek +ve),
Common electrophilles: RC=O (+ve C seeks -ve charge), H+ (positive so will seek -ve charge)
Good luck! :-)
Electrophillic - attracted to negative charge.
To distinguish between them, try:
> Drawing out the mechanism
> Labelling delta +ve atoms (i.e. C in C=O)
> See which atom/bond the attacking species targets.
General rules:
> Nucleophilles will attack atoms (mainly C).
> Electrophilles will attack lone pairs, double bonds and benzene.
Common nucleophilles: Cl-, NH3 (N has a lone pair, so will seek +ve),
Common electrophilles: RC=O (+ve C seeks -ve charge), H+ (positive so will seek -ve charge)
Good luck! :-)
thanksssssss
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