Question

2,5-dietil-3-isopropil-2- secbutil-7-dodecenal

Answer 1

                                                             Ι
                                                                             CH3  CH2
                                                                             Ι        Ι
                                                                    CH3-CH    CH-CH3
 ₁₂     ₁₁      ₁₀      ₉       ₈        ₇       ₆        ₅        ₄    ₃Ι       ₂Ι        ₁
CH3-CH2-CH2-CH2-CH = CH - CH2 -CH -CH2-CH  - C -  CHO
                                                             Ι                         Ι
                                                             CH2CH3           CH2CH3