Questions: Only one of the following processes will occur measurably at room temperature. Which one? a. : F-C:C: b. : N ≡ C: frown CH3 -> -1: c. : N ≡ N: bumpy CH3 II: d. : O=0: - 1 CH2 = CH2

Solution Steps

We need to determine which of the given chemical processes will occur measurably at room temperature. The options are:

a. $\ddot{\mathrm{F}}-\stackrel{\mathrm{C}}{\mathrm{C}}:$ b. $: \mathrm{N} \equiv \mathrm{C}: \frown \mathrm{CH}_{3} \xrightarrow{-1}:$ c. $: \mathrm{N} \equiv \mathrm{N}: \bumpeq \mathrm{CH}_{3} \stackrel{\mathrm{I}}{\mathrm{I}}:$ d. $: \mathrm{O}=0:-{ }^{1} \mathrm{CH}_{2} \stackrel{\mathrm{C}}{=} \mathrm{CH}_{2}$

• Option a: $\ddot{\mathrm{F}}-\stackrel{\mathrm{C}}{\mathrm{C}}:$

  • This represents a fluorine radical attached to a carbon-carbon bond. Fluorine radicals are highly reactive, but this specific structure is not common or stable at room temperature.

• Option b: $: \mathrm{N} \equiv \mathrm{C}: \frown \mathrm{CH}_{3} \xrightarrow{-1}:$

  • This represents a nitrile group ($\mathrm{N} \equiv \mathrm{C}$) with a methyl group. The notation is unclear, but nitriles are generally stable at room temperature.

• Option c: $: \mathrm{N} \equiv \mathrm{N}: \bumpeq \mathrm{CH}_{3} \stackrel{\mathrm{I}}{\mathrm{I}}:$

  • This represents a diazo compound ($\mathrm{N} \equiv \mathrm{N}$) with a methyl group and iodine. Diazo compounds can be unstable and reactive, especially with iodine.

• Option d: $: \mathrm{O}=0:-{ }^{1} \mathrm{CH}_{2} \stackrel{\mathrm{C}}{=} \mathrm{CH}_{2}$

  • This represents a carbonyl group ($\mathrm{O}=0$) with a methylene group and a double bond. This structure is not typical and seems unstable.

• Option a: Unstable due to the fluorine radical.
• Option b: Stable nitrile group, likely to occur at room temperature.
• Option c: Unstable diazo compound with iodine.
• Option d: Unstable and unusual structure.

Final Answer