Lesson 28-29 Structure and Molecular Formulas

Similar

smelling substance are placed in the same category

Fruity

It can include apples, bananas, strawberries, and pineapples

Similar

smelling substance are placed in the same category

Fruity

It can include apples, bananas, strawberries, and pineapples

Floral

Roses and Geraniums

Sweet

Fruity and floral smelling substances might be grouped into a larger category called

What are the three categories

Sweet
Minty
Fishy

All the molecules

Contain carbon and hydrogen
Have more hydrogen than carbon
Are composed of three different types of atoms

Sweet-smelling molecules

Contain two oxygen atoms
Have twice as many hydrogen as carbons
Have two-word names ending in “-ate”

Minty-smelling molecules

Contain one oxygen atom
Contain 10 carbon atoms
Have even numbers of carbon and hydrogen atoms
Have names ending on “-one’

Fishy-smelling molecules

Contain a nitrogen atom
Do not contain oxygen atoms

Identify this Molecular Formula: Pentyl Acetate C₇H₁₄O₂

Sweet

Identify this Molecular Formula: C₆H₁₅N

Fishy

Identify this Molecular Formula: Propyl Acetate C₅H₁₂O₂

Sweet

Identify this Molecular Formula: Pentatonic Acid C₅H₁₀O₂

Sweet but not really sweet, it ends in acid. As a result it is a new category which is putrid/

Identify this Molecular Formula: Ethylthiol C₂H₆S

Skunk Smell because it contains sulfer, made out of three atoms, and contains carbon and hydrogen.

What does it tell us?

Two compounds can have identical formulas, different names, and very different smells.

Isomers

molecules with the same molecular formula but different structural formula.