The electronic configuration of carbon and oxygen atoms as
C6 =1s2 2s2 2p2
O8 =1s2 2s2 2p4
This information can be used to determine the Lewis Dot Structure of Carbon monoxide (CO):
Step 1: calculate total valence electrons for carbon and oxygen atoms.
C = 4
O = 6
Total electrons in CO molecule =10
Step 2: Find octet electrons for each atom , carbon and oxygen
C: 8
O: 8
Total octet electrons =16
Step 3: Find the bonding electrons Subtract total valence electron from total octet electrons
16-10=6 electron (3 bond pair)
Step 4: Find number of bonds between carbon and oxygen atoms by dividing the number of bonding electrons by 2
6-electrons/2 = 3 bonds
Step 5: The rest are non bonding pairs. Subtract bonding electrons from valence electrons .
The Lewis structure of CO is identical with that for HC:::CH except that the C-H bond pair replace by lone pairs.
"CO is also isoctronic with CN-"
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