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Chapter 8: Q. 70b E (page 262)

We鈥檒l see in the next chapter that alkynes undergo many of the same reactions that alkenes do. What product might you expect from each of the following reactions?

Short Answer

Expert verified

(b).

Step by step solution

01

Reaction of alkyne with H2 Pd/C

It is known as Lindlar'scatalyst which reduces the alkyne to alkane by adding two equivalents ofH2 in the syn manner.

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Most popular questions from this chapter

How would you distinguish between the following pairs of compounds using simple chemical tests? Tell what you would do and what you would see.

(b) 2-Hexene and benzene

Question:Predict the products of the following reactions, showing both regiochemistry and stereochemistry where appropriate:

(d)

Compound A, C10H18O, undergoes reaction with dilute H2SO4at 50 掳C to yield a mixture of two alkenes, C10H16. The major alkene product, B, gives only cyclopentanone after ozone treatment followed by reduction with zinc in acetic acid. Identify A and B, and write the reactions.

Cyclopentanone

Compound A has the formula C8H8. It reacts rapidly with KMnO4to giveCO2 and a carboxylic acid, B (C7H6O2), but reacts with only 1 molar equivalent of H2on catalytic hydrogenation over a palladium catalyst. On hydrogenation under conditions that reduce aromatic rings, 4 equivalents ofH2 are taken up and hydrocarbon C (C8H16)is produced. What are the structures of A, B, and C? Write the reactions.

Iodine azide, adds to alkenes by an electrophilic mechanism similar to that of bromine. If a monosubstituted alkene such as 1-butene isused, only one product results:

a) Add lone-pair electrons to the structure shown for, and draw a

second resonance form for the molecule.
See all solutions

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