Nucleophile (nukleofil)
Explanation
about nucleophile
A
nucleophile is a chemical species that donates an electron pair to an
electrophile to form a chemical bonding relation to a reaction. All molecules or
ions with a free pair of electrons or at least one pi bond can acts as
nucleophiles. Because nucleophiles donate electrons, they are by definition
lewis bases.
Nucleophilic
describes the affinity of a nucleophile to the nuclei.
Nucleophilicity,
sometimes reffered to as nucleophile strength, refers to a
substance’s nucleophilic character and is often used to compare the affinity of
atoms.
Neutral
nucleopilic reactions with solvents such as alcohols and water are named
solvolysis. Nucleophilic may take part in nucleophilic substition, whereby a
nucleoohile becoms attracted to a full of partial positive charge.
Nucleophilic
substitution reaction
In
nucleophilic substitution reaction of atoms/groups that have replaced
electronegativity greater than C atoms, and the atoms/cluster replacement.
R-X
+ :Nu ->
R – Nu+ + X-
Alkil
halida Nukleofil netral(neutral nucleophile) gugus terlepas (leaving group)
R-X + Nu- -> R
– Nu + X-
Nukleofil
bermuatan negatif(negative
nucleophile)
Example
:
CH3-CH2Cl + :NH3
->CH3-CH2+NH3
+ Cl-
CH3CH2CH2Br
+ CN- -> CH3CH2CH2-C≡N +Br-
Komentar
Posting Komentar