LT#1: Representing and Describing Organic Compounds

Question 1

Define Organic Compound

Answer 1

Molecular compounds based on a carbon backbone. They mainly contain carbon-carbon and carbon-hydrogen bonds

Question 2

Define Aliphatic Hydrocarbon

Answer 2

Contains C and H atoms in chains, branches and rings

Question 3

Define Aromatic Hydrocarbon

Answer 3

Contains C and H atoms in rings with resonance (1.5 bonds)

Question 4

Why are expanded molecular formulas used to represent organic compounds?

Answer 4

1. Shows groupings of atoms to give idea of structure.

2. Distinguishes between 2 isomers.

Question 5

Describe how to write a expanded molecular formula

Answer 5

Brackets show that you have multiple identical CH groups OR if you have a branch coming off your molecule.

Question 6

Define Structural Isomers

Answer 6

Molecules with the same molecular formulas, but different structures.

Question 7

What VSEPR shape is around a carbon with 4 single bonds?

Answer 7

Tetrahedral

Question 8

What VSEPR shape is around a carbon with 1 double and 2 single bonds?

Answer 8

Trigonal Planar

Question 9

What VSEPR shape is around a carbon with 2 double or 1 triple?

Answer 9

Linear

Question 10

What VSEPR shape is around a Oxygen with 2 bonding pairs and 2 lone pairs?

Answer 10

Bent 109

Question 11

What VSEPR shape is around a Nitrogen with 3 bonding pairs and 1 lone pair?

Answer 11

Trigonal Pyramidal

Question 12

Describe how to draw a line diagram of an organic compound.

Answer 12

Squiggly line with a carbon atom at each end and corner

Question 13

Describe how to draw a condensed structural diagram of an organic compound.

Answer 13

Show just CH groups (not each C-H bond)

1. Draw the main chain horizontal across page.
2. Add branches on appropriate carbons.
3. Add enough hydrogens so each carbon has four bonds.