(a) A compound U (C9H10O) gives a negative iodoform test. The IR spectrum of U shows a strong absorption peak at 1690 cm-1. The 1H NMR spectrum of U gives the following:
Triplet ................................. δ 1.2 (3H)
Quartet ............................... δ 3.0 (2H)
Multiplet .............................. δ 7.7 (5H)
What is the structure of U?
(b) A compound V is an isomer of U. Compound V gives a positive iodoform test; its IR spectrum shows a strong peak at 1705 cm-1.
The 1H NMR spectrum of V gives the following:
Singlet ................................ δ 2.0 (3H)
Singlet ................................ δ 3.5 (2H)
Multiplet ............................. δ 7.1 (5H)
What is the structure of V?