Indian Forest Service (Mains), Chemistry optional · 2022 · Paper II
Q5(g). Epoxide opening by dimethylamine
Question
Complete cyclopentene → A (mCPBA) → B (Me₂NH), and explain.
Answer in brief
A is cyclopentene oxide; B is trans-2-(dimethylamino)cyclopentan-1-ol, formed as a racemate.
Part of VKC Basic
Read the key points and the full model answer with VKC Basic
VKC Basic (₹999 for 6 months) opens every solved answer, the notes, the handbook and the daily answer archive. Every Mains test series includes it.
The full model answer
As written for the answer booklet: the diagram carries the working, the lines stay short. Read here only; it is not offered as a download.
The handwritten model answer pages open with the VKC plan.
CoversmCPBA epoxidationepoxide ring openingtrans amino alcoholcyclopentene oxideanti addition
All parts of Question 5
- 5(a) Hydrophobic effect in biomolecules5 marks
- 5(b) Stopping radical styrene polymerization5 marks
- 5(c) Complementary DNA and RNA sequence5 marks
- 5(d) CO bond length from rotational spacing5 marks
- 5(e) Isotope shift of C–H stretching5 marks
- 5(f) Relative carbonyl stretching frequencies5 marks
- 5(g) Epoxide opening by dimethylamine5 marks
- 5(h) Labelled allylic bromination5 marks