D. Isomerism and Nomenclature Practice. Indicate whether each of the following c

Question

D. Isomerism and Nomenclature Practice. Indicate whether each of the following compound pairs are geometric isomers, structural isomers, or not isomers at all. Write the isomer type (or not isomers' on the linc next to the number, above the pair of structures. Write the names for the compounds under each formula. CH3-CH=CH-CH3 CH3-CHz-CH-CH2 and Br Br Br C=C Br and H C HyC-C-CH2 HyC-C-CH2 Cl CI CI and 4 H-C-H H F H H H-C-C-C-C-H H H I H IH H-C-C-C-H FH H Lab_Page 9 of I Introduction to Organic Molecules

Explanation / Answer

Structural (constitutional) isomers are compounds that have same molecular formula but their atoms are bonded in different order, whereas geometric isomers are compounds with same molecular and strcutural formula but differ only in the arrangement of their atoms in space. Therefore, the given molecules can be classified as -

1. Structural isomers

2. Geometrical isomers (cis-trans isomers)

3. Not isomers at all. These two are identical compounds since free rotation around C-C single bonds is allowed.

4. Structural isomers.

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