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3.42 sp H₃C H sp sp a) CH₃C=CCH₃ b) c) CH₃-C=N H CH₃ sp2 sp2 d) CH₃CH₂NH₂ e) sp2 sp2 H sp2 sp2 f) N N g) sp2 sp2 3.43 a) The double bonds are conjugated. b) All three double bonds are conjugated. CH₂=CHCH=CHCH c) The double bond is conjugated with one pi bond of the triple bond. d) The two double bonds and the electron pair on N are conjugated. e) The double bonds are not conjugated. 46