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Consider the Lewis structures for H2CCH2,
H2CCCH2, and H2CCCCH2. What hy-
bridization should be expected for the CH2
carbon and the middle CCC carbon, respectively?
1. sp; sp2
2. sp; sp3
3. sp3; sp2
4. None of these
5. sp2; sp3
6. sp3; sp
7. sp2; sp
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2HC=C=CH2
THE CARBONS ARE NAMED AS A B C FROM LEFT TO RIGHT
IN CARBON A
VALANCE ELECTRONS 4
UNSATURATION 1
4-1=3
SO SP2 HYBRID
CARBON B VALANCE ELECTRON 4
UNSATURATION 2
4-2=2
SO S SP HYBRID