Topic 2.3

How many species of absorbing?

• 3

• 5

• 2

• 4

Electron that are not involved bonding between atoms.

What type of electron is this?

• Pi

• Lone pair

• Sigma

Unsaturated compounds

• Lone pair - sigma*

• Sigma - sigma*

• n - pi*

• pi - pi*

Group of atoms ( -OH, -NH2 & halogens)

• Chromophores

• Auxochromes

Absorption maximum shifted to shorter wavelength

• Hypsochromic shift

• Bathochromic shift

Bathochromic shift is

• Blue shift

• Red shift

Visible move to what region next

• Gamma ray

• UV

• Microwave

• Infrared

2 types of methods for quantitative analysis

• Calibration and Standard

• Standard and Titration

• Calibration and titration

• Titration and Transition