Answer to Question #291965 in Organic Chemistry for Sukhjit

Question

What is the molecular formula for a hydrocarbon with 10 carbons that is (a) completely saturated (b) alkene (c) alkyne

Answer 1

1) Completely saturated Alkane Decane C₁₀H₂₂

2) alkene.

Molecular Formula C₁₀H₂₀

Synonyms

1-DECENE

Dec-1-ene

872-05-9

Decylene

n-1-Decene

More...

Molecular Weight

140.27

Dates

• Modify2022-01-22
• Create2005-03-26

Description

1-decene is a colorless watery liquid with a pleasant odor. Floats on water. (USCG, 1999)

CAMEO Chemicals

1-decene is an alkene that is decane containing one double bond at position 1. It has a role as a metabolite.

3) Alkyne

Decyne

Molecular formular

C₁₀H18 Synonyms

3-Decyne

2384-85-2

dec-3-yne

3-C10H18

Ethyl n-hexyl acetylene

More...

Molecular Weight

138.25

Dates

• Modify2022-01-22
• Create2005-03-27

Homologous Series". The sequence starts with C₃H₈, and a CH₂ unit is added in each step moving up the series. Any family of compounds in which adjacent members differ from each other by a definite factor (here a CH₂ group) is called a homologous series. The members of such a series, called homologs, have properties that vary in a regular and predictable manner. The principle of homology gives organization to organic chemistry in much the same way that the periodic table gives organization to inorganic chemistry. Instead of a bewildering array of individual carbon compounds, we can study a few members of a homologous series and from them deduce some of the properties of other compounds in the series.

Figure 1.3 Members of a Homologous Series

Each succeeding formula incorporates one carbon atom and two hydrogen atoms more than the previous formula.

The principle of homology allows us to write a general formula for alkanes: C_nH_{2n + 2}. Using this formula, we can write a molecular formula for any alkane with a given number of carbon atoms. For example, an alkane with eight carbon atoms has the molecular formula C₈H_{(2 × 8) + 2} = C₈H₁₈.