Two students each make a statement about 2-methylbut-1-ene. Student 1 states that 2-methylbut-1-ene has geometrical isomers. Student 2 states that 2-methylbut-1-ene reacts with $$\(\mathrm{HBr}\)$$ in an addition reaction to give 1-bromo-2-methylbutane as the main product. Which students are correct?
A.
both 1 and 2
B.
1 only
C.
2 only
D.
neither 1 nor 2
Exam No：9701_w20_qp_11 Year：2020 Question No：21
Answer:
D
Knowledge points:
13.4.2 describe stereoisomerism and its division into geometrical (cis/trans) and optical isomerism (use of E, Z nomenclature is acceptable but is not required)
14.2.5 describe and explain the inductive effects of alkyl groups on the stability of primary, secondary and tertiary cations formed during electrophilic addition (this should be used to explain Markovnikov addition)
Solution:
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