Chemistry A-Level
permanent positive charge
What permanent positive charge means in Chemistry A-Level, as defined for AQA.
Definition of permanent positive charge
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Reference: AQA
A quaternary ammonium ion has four groups bonded to the nitrogen and this charge, because there is no lone pair left and no N-H bond to lose.
Topics that use permanent positive charge
- Nucleophilic properties (A-level only) (AQA A-Level)
Related terms
- addition-elimination
- amide formation
- anhydride versus acyl chloride
- attack at a δ⁺ carbon
- attraction to negative surfaces
- Bond enthalpy
- cationic surfactant
- controlling the product
Using permanent positive charge in the exam
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