Structure 3.2

Question 1

Homologous series

Answer 1

Same general formula, but differ from each other by CH2 group

Question 2

Skeletal formula

Answer 2

Basic representation of structure formula where atoms are not shown but ends of lines and vertex represent carbon atoms

Question 3

Stereochemical formula

Answer 3

Attempts to show the relative positions of atoms and groups around a central carbon in three dimension

Question 4

Stereochemical bonds description

Answer 4

Bond sticking fowards from the page is a solid wedge, bond sticking behind the page is a dashed wedge and a bond in the plane of paper is a solid line

Question 5

As n increases in homologous series…

Answer 5

So does the boiling point as the weak London dispersion forces increases with increasing mass and surface area

Question 6

States at STP (alkanes)

Answer 6

Meth, eth and propane are gases. n=5 to n=20 liquids. n>20 solids.

Question 7

Structural isomers

Answer 7

Compounds that possess the same molecular formula but with a different arrangement of atoms.

Question 8

Primary, secondary and tertiary structural isomers

Answer 8

Primary - attached to one R group. Secondary - attached to two R groups. Tertiary - attached to 3 R groups

Question 9

Chain isomers

Answer 9

Differ in the length of the longest carbon chain

Question 10

Position isomers

Answer 10

Differ in the position of functional groups within the molecule.

Question 11

Functional group isomers

Answer 11

Differ in the type of functional group present Different physical and chemical properties.