In the following compound, the stereochemical descriptor for Ha and Hb is · ABC26OR0038
Subject: Organic Chemistry · Chapter: General Organic Chemistry · Topic: General Organic Chemistry – General · Exam: CSIR NET JUNE 2015 · Marks: 2 · Difficulty: Easy
In the following compound, the stereochemical descriptor for $\mathrm{H_a}$ and $\mathrm{H_b}$ is 
(a)enantiotopic
(b)diastereotopic
(c)homotopic
(d)constitutionally heterotopic
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
The CH₂OH protons sit on an axially chiral (atropisomeric) binaphthyl: replacing Ha or Hb gives diastereomers, so Ha and Hb are diastereotopic (b).
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