Organic Chemistry · Chapter 8: Carboxylic Acids

Question

A ____ carbon lactone is called valerolactone.

Answer

A 5 carbon lactone is called valerolactone.
A 5 carbon lactone is called valerolactone.
Example: Here we see that acid halide, which is the most reactive carboxylic derivative participates in nucleophilic substitution in order to become other carboxylic derivatives, which are all less reactive than an acid halide.
Extra Note: Increasing frequency of the C=O absorption in the IR, as reactivity increases.
Carboxylic Derivatives Reactivity Order:
[1] Acid Halides → [2] Ester → [3] Carboxylic Acid → [4] Anhydride → [5] Ester.
Note: Took quite some effort to edit and put together this chart. Stare at it. Engrain it in your brain.
In Summary: As the basicity of Z increases, the stability of RCOZ increases because of added resonance stabilization.

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