4.6 Isomerism

Question 1

Isomerism

Answer 1

When 2 or more compounds have the same molecular formula but different arrangements of atoms.

Question 2

Structural Isomerism

Answer 2

When 2 or more compounds have the same molecular formula, but different structural formula.

Question 3

Stereoisomerism

Answer 3

When 2 or more atoms have the same molecular formula and the same structural formula but different 3D spatial arrangement of their bonds.

Question 4

Asymmetric (Chiral) Centre

Answer 4

An atom that is attached to 4 different atoms or groups of atoms.

Question 5

Optically Active

Answer 5

An optically active compound is able to rotate the plane of plane polarised light.

Question 6

Racemic Mixture

Answer 6

A mixture containing equal amounts (50:50) of two optical isomers.

Question 7

Plane Polarised Monochromatic Light

Answer 7

Light in which the vibrations are all in one plane.

Question 8

Optical Isomers

Answer 8

Two compounds that exist as non-superimposable mirror images.