Exceptions to Octet Rule

IncompleteOctet

• Halides of Group 13
• BF3 AlCl3 BCl3
• Hydride of Group 13
• BeCl2 , ZnCl2 G,CH3)3

Expansion of octet

• Central Atom has more than 8e  PCl5-SF6

Pseudo Inert Gas Configuration

CATIONS WITH 18E IN OUTER MOST SHELL

• Ga+3
• Cu+
• Ag+
• Zn+2
• Sn+4
• Pb4+

Cations Having 9 to 17 e-s in outermost shell

ODD ELECTRON MOLECULE

CENTRAL ATOM HAS UNPAIRED OR ODD NO OF ELECTRONS