Lewis Dot Structure Worksheet
If you are trying to come up to speed on Lewis structures, try working these examples to experience the range
of complications. Remember, creating 3-D Lewis structures allows you to identify the existence of dipoles and
molecular symmetry. Physical properties of molecules based upon polarity and the types of intermolecular
interactions also follow from these structures.
CH4H2O CO2N2BeCl2
C central atom, octet rule O central atom, octet again C central, famous double bond Famous triple bond Be is too small for octet
S/2/B = 1, single S/2/B = 1, single S/2/B = 2, double S/2/B = 1, triple S/2/B = 1, single
BF3C2H4C2H6CO O2
B is too small for octet Multiple central, but C is
octet Multiple central, but C is octet Another famous triple bond Famous double bond
S/2/B = 1, single not for multiple central atoms not for multiple central atoms S/2/B = 3, triple S/2/B = 2, double
NO NO2-NO3-NH3NH4+
Odd ball, no octet Is this odd? e - saves the day Famous resonance Famous tetrahedral, octet rule Still tetrahedral even with H+
S/2/B = 2.5, ??? S/2/B = 3/2, resonance S/2/B = 4/3, resonance S/2/B = 1, single S/2/B = 1, single
O3ClF3 SO4=SF6SF4
Why is this famous? What the heck is this? Hard. Famous for not being resonance 6 bonds, must be octahedral This one is NOT like CH4
S/2/B = 3/2, resonace S/2/B = 2/3, larger than octet S/2/B = 1, single S/2/B = 2/3, larger than octet S/2/B = 3/4, larger than octet
I3-XeCl2PF5CO3=BrF5
Laude’s favorite example Do these make bonds? 5 bonds make trigonal pyrimidal Another famous resonance Not 5 electron regions, but 6
S/2/B = _, larger than octet S/2/B = _, larger than octet S/2/B = 4/5, larger than octet S/2/B = 4/3, resonance S/2/B = 3/5, larger than octet
