Quiz | Alkynes

1

The triple bond of an alkyne is composed of:

3 σ bonds

2 σ bonds + 1 π bond

1 σ bond + 2 π bonds

3 π bonds

2

How many distinct alkynes exist with a molecular formula of C4H6?

0

1

2

3

3

Which of the following reagents should be used to convert but-2-yne to (E)-but-2-ene?

H2, Pt

H2, Lindlar catalyst

Na, NH3 (liq.)

HgSO4, H2O

4

Which of the following reagents should be used to convert but-2-yne to (Z)-but-2-ene?

H2, Pt

H2, Lindlar catalyst

Na, NH3 (liq.)

HgSO4, H2O

5

Which of the species below is less basic than acetylide?

BuLi

MeMgBr

MeONa

All of the above

6

Which of the alkyne addition reactions below involve an enol intermediate?

Hydrogenation

Hydroboration - Oxidation

HgSO4 in dilute H2SO4

Both Hydrogenation and HgSO4 in dilute H2SO4

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