Nucleophilic Substitution Reactions Lab Below are my lab results. The first time

Question

Nucleophilic Substitution Reactions Lab

Below are my lab results. The first time recorded is for SN1 reactions with silver nitratate in ethanol solution. The second time recorded is for SN2 reactions with sodium iodide. Why did most of the primary starting material halides react faster in the SN1 reactions when they were supposed to react faster in the SN2 reactions? Please give a comparison between SN1 and SN2 reactions for each of the ten halides so I can understand what is going on in this experiment. Thank you!!

2-bromobutane (2) 0:20 5:56 Bromobenzene (1) 6:56 N/A 1-bromobutane (1) 0:48 0:24 Cyclohexyl bromide (1) 0:06 11:00 1-bromo-2-methylpropane (1) 0:42 6:31 1-chlorobutane (1) 7:02 6:02 Crotyl chloride (1) 0:03 0:35 Benzyl chloride (1) 0:27 0:31 2-chlorobutane (2) 6:22 8:46 2-chloro-2-methylpropane (3) 0:01 N/A

Explanation / Answer

If primary alkyl halide have steric hindarance effect they undergo SN2 mechanism

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