ABC26OR0124 · Organic Spectroscopy
Subject: Organic Chemistry · Chapter: Organic Spectroscopy · Topic: UV Vis · Exam: CSIR-NET JUNE 2013 · Marks: 2 · Difficulty: Medium
In the UV-visible is spectrum, a diterpenoid exhibited a $\lambda_{\max }=275 \mathrm{nm}$. The compound, among the choices given below is
(a)
(b)
(c)
(d)
Answer
Answer (as printed): C
Explanation
For Homo annular diene, Basic value = 253 Ring residue = 20 Exo double bond = 5 That adds up to: 253 + 20 + 5 = 278 nm. This value is close to 275 nm. Thus, correct answer is (c).
Explanation as extracted from the printed page; notation may be imperfect.