Lewis Acid/Base Interaction Matrix Database
|Type 12 Lewis Acid/Base Complexation Chemistry |
|Proton Transfer or Alkylation |
[NH4]+ + π– NH3 + H-π
[R3O]+ + π– R2O: + R-π
|Bonding: || |
Charge controlled ionic bonding, but... a proton transfer reaction is likely to occur rather than the formation of a complex.
|Charge: || A reaction always occurs, rather than forming a Lewis acid/base complex so the idea of a charge on a complex is not applicable. |
|Chemistry: || |
Onium ions generally do not often form complexes with π-HOMO Lewis bases because H+ or R+ transfer (from the onium ion to the π-HOMO Lewis base) is likely to occur.
The acetate ion can be dual classified as both as a Lobe-HOMO and π-HOMO Lewis base (the acetate ion is isoelectronic with the allyl anion). Thus, ammonium acetate can be considered to be a Type 12 complex:
(but it is probably better to consider it as a Type 11 complex.)
|Congeneric Series: ||A reaction always occurs, rather than forming a Lewis acid/base complex so the idea of congeneric series is not applicable. |
|Type 12 Lewis acid/base complex (generic)
Nucleophiles & Bases
© Mark R. Leach 1999-
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