QuestionJune 29, 2025

Hexane, C_(6)H_(14) would have which of the following fragments in its mass spectrum? Check all that apply. (m)/(z)=32 (m)/(z)=57 (m)/(z)=29 (m)/(z)=43

Hexane, C_(6)H_(14) would have which of the following fragments in its mass spectrum? Check all that apply. (m)/(z)=32 (m)/(z)=57 (m)/(z)=29 (m)/(z)=43
Hexane, C_(6)H_(14) would have which of the following fragments in its mass spectrum? Check all that apply. (m)/(z)=32 (m)/(z)=57 (m)/(z)=29 (m)/(z)=43

Solution
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Answer

\frac {m}{z}=32, \frac {m}{z}=57, \frac {m}{z}=29, \frac {m}{z}=43 Explanation 1. Identify possible fragments Hexane, C_{6}H_{14}, can break into smaller hydrocarbon fragments. Common fragments include methyl (CH_3^+), ethyl (C_2H_5^+), propyl (C_3H_7^+), and butyl (C_4H_9^+). 2. Calculate mass-to-charge ratios - For \frac{m}{z}=32: This corresponds to CH_3CH_2^+ (ethyl cation). - For \frac{m}{z}=57: This corresponds to C_4H_9^+ (butyl cation). - For \frac{m}{z}=29: This corresponds to C_2H_5^+ (ethyl cation). - For \frac{m}{z}=43: This corresponds to C_3H_7^+ (propyl cation). 3. Verify fragment presence All calculated fragments are common in the fragmentation of hexane.

Explanation

1. Identify possible fragments<br /> Hexane, $C_{6}H_{14}$, can break into smaller hydrocarbon fragments. Common fragments include methyl ($CH_3^+$), ethyl ($C_2H_5^+$), propyl ($C_3H_7^+$), and butyl ($C_4H_9^+$).<br /><br />2. Calculate mass-to-charge ratios<br /> - For $\frac{m}{z}=32$: This corresponds to $CH_3CH_2^+$ (ethyl cation).<br /> - For $\frac{m}{z}=57$: This corresponds to $C_4H_9^+$ (butyl cation).<br /> - For $\frac{m}{z}=29$: This corresponds to $C_2H_5^+$ (ethyl cation).<br /> - For $\frac{m}{z}=43$: This corresponds to $C_3H_7^+$ (propyl cation).<br /><br />3. Verify fragment presence<br /> All calculated fragments are common in the fragmentation of hexane.
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