Organic chemistry introduction

Question 1

In 2009 a new material called graphane was discovered. The diagram shows part of a model of the structure of graphane. Each carbon atom is bonded to three other carbon atoms and to one hydrogen atom. State how two carbon atoms form a carbon–carbon bond in graphane.

Answer 1

Shared pair of electrons / one electron from each C atom

Question 2

Suggest why graphane does not conduct electricity.

Answer 2

No delocalised / free / mobile electrons

Question 3

Ammonia is very soluble in water.State the strongest type of intermolecular force between one molecule of ammonia and one molecule of water.

Answer 3

Hydrogen bonding / hydrogen bonds / H-bonding / H-Bonds

Question 4

Phosphine (PH3) has a structure similar to ammonia.In terms of intermolecular forces, suggest the main reason why phosphine is almost insoluble in water.

Answer 4

(Phosphine) does not form hydrogen bonds (with water)