Give the systematic (IUPAC) names of the following alkenes.
(f)
(g)

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Step 1: Identify the longest carbon chain that contains the double bond. This will be the parent chain for naming the alkene.

Step 2: Number the carbon atoms in the parent chain starting from the end nearest to the double bond. This ensures the lowest possible numbers for the double bond position.

Step 3: Determine the position of the double bond by identifying the number of the first carbon involved in the double bond. Use this number in the name to indicate the location of the double bond.

Step 4: Identify and name any substituents attached to the parent chain. Use the appropriate prefixes (e.g., methyl, ethyl) and number them according to their position on the chain.

Step 5: Combine the elements of the name: start with the substituents in alphabetical order, followed by the parent chain name with the double bond position indicated, and end with the suffix '-ene' to denote the presence of the alkene.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

IUPAC Nomenclature

IUPAC nomenclature is a standardized system for naming chemical compounds. It ensures that each compound has a unique name, which is derived from its structure. For alkenes, the name is based on the longest carbon chain containing the double bond, with the position of the double bond indicated by the lowest possible number.

Alkene Structure

Alkenes are hydrocarbons that contain at least one carbon-carbon double bond. The presence of this double bond affects the compound's reactivity and naming. Understanding the structure involves identifying the longest carbon chain and the position of the double bond, which are crucial for systematic naming.

Numbering Carbon Chains

Numbering carbon chains is essential in IUPAC nomenclature to identify the position of functional groups or double bonds. The chain is numbered from the end nearest to the double bond, ensuring the lowest possible numbers are assigned to the double bond and substituents, which helps in accurately naming the compound.

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