L42- Nucleophiles and electrophiles Flashcards
1
Q
when will a reaction occur?
A
- when molecules have reacted activation energy
- right orientation
2
Q
how do electrons move? positive/negative
A
-negative TO positive
3
Q
what are 4 types of nucleophiles?
A
- Nu:
- Nu^-
- double bond
- bond with polarisation
4
Q
what can anionic substance act as?
A
nucleophile
5
Q
what is the most common electrophile?
A
H+
6
Q
why is boranes classed as electrophiles
A
because they have an empty orbital in their valence shell
7
Q
what is a hard nucleophile?
A
-containing small electronegative atoms e.g. O cl
8
Q
what is a soft nucleophile?
A
Nucleophiles containing larger atoms (eg S, P, I and Se) tend to react predominantly under control by orbital overlap
