Alkynes

What is the correct IUPAC name for the following structure

• (Z) 1-cyclopentyl-3,6-dimethylhept-3-en-1-yne
• (E) 1-cyclopentyl-3,6-dimethylhept-1-yn-3-ene
• (Z) 1-cyclopentyl-4,7-dimethylhept-4-en-2-yne
• (E) 1-cyclopentyl-3,6-dimethylhept-3-en-1-yne

Tags

NGSS.HS-PS1-3

What is the correct IUPAC name for the following compound?

• 4-(1-bromopropyl)-1-hexen-5-yne
• 4-allyl-5-bromo-1-hexyne
• 3-(1-bromopropyl)-5-hexen-1-yne
• 5-bromo-4-ethynyl-1-heptene

Which of the following improperly describes the physical properties of an alkyne?

• relatively nonpolar
• nearly insoluble in water
• less dense than water
• insoluble in most organic solvents

Which of the following alkynes has the lowest boiling point?

• 1-pentyne
• 2-hexyne
• 3-pentyne
• 1-butyne

In trans-hept-4-en-2-yne the shortest carbon-carbon bond is between carbons

• 2 and 3
• 1 and 2
• 3 and 4
• 4 and 5

Among the compounds water, but-1-yne, but-2-yne, and ethane, which are stronger acids than ammonia?

• but-1-yne and ethane
• water and but-1-yne
• water and ethane
• but-1-yne and but-2-yne

Why is a terminal alkyne favored when sodium amide (NaNH2) is used in an elimination reaction with 2,3-dichlorohexane?

• The strong base deprotonates the terminal alkyne and removes it from the equilibrium
• The resonance favors the formation of the terminal rather than internal alkyne
• The positions of the Cl atoms induce the net formation of the terminal alkyne
• The terminal alkyne is not favored in this reaction

What is the major organic product that results when 3-heptyne is hydrogenated in the presence of Lindlar's catalyst?

• 2-heptyne
• (Z)-2-heptene
• (Z)-3-heptene
• (E)-3-heptene

What class of organic product results when 1-heptyne is treated with a mixture of mercuric acetate in aqueous sulfuric acid?

• aldehyde
• ketone
• diol
• ether