What alkene could you use to make the following products?...

What alkene could you use to make the following products? Draw the structure of the alkene, and tell what other reagent is also required for the reaction to occur.
(a) (Can't copy)
(b) $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_3$
(c) (Can't copy)
(d) (Can't copy)
(e) (Can't copy)

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Key Concepts

Reagent Selection for Alkene Transformation

Choosing the correct reagent for the transformation of an alkene into a desired product is a fundamental aspect of synthetic organic chemistry. In the context of converting an alkene to an alkane, selecting hydrogen gas along with an appropriate catalyst is essential. This understanding helps in designing synthetic routes where the manipulation of carbon–carbon multiple bonds is required to achieve specific molecular targets.

Alkene Structure and Reactivity

Alkenes are hydrocarbons characterized by a carbon–carbon double bond, which is a source of high electron density making them reactive toward a variety of addition reactions. Their unsaturation provides a site for reactivity that is absent in alkanes, meaning that alkenes can be transformed into a variety of functional groups by reacting with suitable reagents under appropriate conditions.

Catalytic Hydrogenation

Catalytic hydrogenation is a reaction process in which an alkene is converted into an alkane by the addition of hydrogen (H?) across the double bond in the presence of a catalyst such as palladium, platinum, or nickel. This reaction is a key method in organic synthesis for reducing unsaturated compounds to saturated ones, and it is typically carried out under mild conditions to ensure selectivity and efficiency.

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