review aliphatic hydrocarbons

2-chloro-2-methylpropane

1-chloro-3-methyl-2-nitrobutane

alkenes and alkynes

Multiple Choice

A compound consists of carbon and hydrogen elements only. It also contains a carbon-carbon double bond. This compound is known as

• saturated organic compound

• unsaturated organic compound

• saturated hydrocarbon

• unsaturated hydrocarbon

Multiple Choice

Which of the following shows the structure of propene?

Multiple Choice

Which of the following shows the structure of ethene?

Multiple Choice

General formula of Alkene is

• C_nH_2n+2

• C_nH_2n

• C_nH_2n+1OH

• C_nH_2n+1COOH

Introduction

•

that

contain

the

carbon

-

carbon

triple

bond

-

C

≡

C

-

are

called

alkynes.

•

Each

triple

bond

contains

one

sigma

(σ)

and

two

pi

(π)

bonds.

4

Alkynes

Hydrocarbons

Multiple Choice

ALKYNES are unsaturated hydrocarbons that have at least one triple bond.

• True

• False

6

Alkynes

Multiple Choice

Which of the following could contain a triple bond?

• C₄H₁₀

• C₄H₈

• C₄H₆

• C₄H₁₂

Multiple Choice

What is the general formula of the alkynes?

• C_nH_2n+1

• C_nH_2n+2

• C_nH_2n

• C_nH_2n-2

Multiple Choice

What is the correct name for the alkyne shown?

• butyne

• 1-butyne

• 1-methyl-1-propyne

• 2-butyne

•

Example

: Draw the structural formulae of the given alkynes.

a

. 4,4–dimethyl–1–pentyne

b

. 4–methyl–2–pentyne

c

. 3,3,3–trifluoro–1–propyne

a.

b.

c.

9

Alkynes

Multiple Choice

Name the following structure using the IUPAC nomenclature

• 5-methyl-1-hexyne

• 2-methyl-5-hexyne

• 1-methyl-1-hexyne

• 5-methyl-1-hexene

Homework:
1. page.98: 3-a,b,c,d,e,f

11

Alkynes

•

Thank you for your attention...

12

Alkynes