Advices For Studying Organic Chemistry

Solomons/SoloCh

ethylene formaldehyde formaldimine

or or or

CC

H

H

H

H

CO

H

H

CN

H

H

H

CC

H

H

H

H

CO

H

H

CN

H

H

H

double bond

1.5 WRITING LEWIS STRUCTURES

1.5A. Lewis structure of CH 3 F

1. The number of valence electrons of an atom is equal to the group number of the
   atom.


2. For an ion, add or subtract electrons to give it the proper charge.


3. Use multiple bonds to give atoms the noble gas configuration.

1.5B. Lewis structure of ClO 3 – and CO 3 2–

Cl

O

O

−

O

C

O

OO

2 −

1.6 EXCEPTIONS TO THE OCTET RULE

1.6A. PCl 5

1.6B. SF 6

1.6C. BF 3

1.6D. HNO 3 (HONO 2 )