When asked to draw all the possible constitutional isomers for C3 H8 O, a student drew these str

step 1 Here we're taking a look at the following molecular formula, C3H8O, and we're looking at the iso

When asked to draw all the possible constitutional isomers...

When asked to draw all the possible constitutional isomers for $\mathrm{C}_{3} \mathrm{H}_{8} \mathrm{O}$, a student drew these structures. The student's instructor said some of the structures were identical. (a) How many actual isomers are there? (b) Which structures are identical? When asked to draw all the possible constitutional isomers for $\mathrm{C}_{3} \mathrm{H}_{8} \mathrm{O}$, a student drew these structures. The student's instructor said some of the structures were identical. (a) How many actual isomers are there? (b) Which structures are identical? $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{OH} \quad \mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{O}-\mathrm{CH}_{3}$ $\mathrm{CH}_{3}-\mathrm{O}-\mathrm{CH}_{2}-\mathrm{CH}_{3}$

When asked to draw all the possible constitutional isomers for $\mathrm{C}_{3} \mathrm{H}_{8} \mathrm{O}$, a student drew these structures. The student's instructor said some of the structures were identical.
(a) How many actual isomers are there?
(b) Which structures are identical?
When asked to draw all the possible constitutional isomers for $\mathrm{C}_{3} \mathrm{H}_{8} \mathrm{O}$, a student drew these structures. The student's instructor said some of the structures were identical.
(a) How many actual isomers are there?
(b) Which structures are identical?
$\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{OH} \quad \mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{O}-\mathrm{CH}_{3}$
$\mathrm{CH}_{3}-\mathrm{O}-\mathrm{CH}_{2}-\mathrm{CH}_{3}$

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Key Concepts

Constitutional Isomerism

This concept refers to compounds that have the same molecular formula but differ in the connectivity of their atoms. Understanding constitutional isomerism allows one to see that even when formulas are identical, the way atoms are arranged and bonded can create entirely different substances with distinct properties.

Functional Group Isomerism

Functional group isomers are a type of constitutional isomer that occur when compounds with the same molecular formula contain different functional groups. In the given problem, the isomers fall into different classes such as alcohols (containing a hydroxyl group) and ethers (containing an alkoxy group), illustrating how the overall properties are influenced by the specific functional groups present.

Structural Equivalence and Symmetry in Molecules

This concept involves recognizing when seemingly different structures represent the same molecule due to symmetric arrangement or rotation. In drawing isomers, it is crucial to determine if different depictions are simply different orientations of the same structure, as is the case with the ether isomers presented in the problem.

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