Wednesday, July 17, 2013

Title: Nucleophillic Substitution Reaction

This lab experimented on the chemical substance answers of the chemicals that undergoes SN1 or SN2 chemical chemical answer. Nine divergent compounds were disposed to be examined with ii reagents ? NaI in acetone and AgNO3 in grain alcohol. The SN1 reaction happens in AgNO3 in ethanol reagents, and SN2 reaction is in NaI in acetone. Procedure: avocation the lab manual. Results:compoundNaI /acetone (SN2)AgNO3/ethanol (SN1)BromobenzeneNRNRBromocyclopentaneX2 secBromocyclohexaneNR4 sec2-bromo providedane5 min2 sec2-chloro scarcelyaneNRXChloroacetone7 secX1-chlorobutaneXXt-butyl chlorideNR6 secBenzyl chloride3 toying?Conclusions and discussionBromobenzene undergoes no reaction for both SN1 and SN2. This is because bromobenzene is very stable, and contains allylic and vinyllic bromine, which is as well as very stable, and cannot be a good nucleophile. Bromocyclopentane reacts under SN1 and SN2, but it shows a faster reaction in AgNO3/ethanol reagent, that is SN1. This is because bromocyclopentane is junior bromine, and have big steric strain, since it is a cyclic compound. The larger steric in a molecule, the harder it is for the nucleophile to attack the loss group (-Br) from the opposite fonts, therefore, SN2 reaction is slower than SN1 for bromocyclopentane. From this reaction, precipitation occurs to natural spring out AgBr in ethanol and NaBr in acetone. Bromocyclohexane, on the some other hand, shows no reaction in SN2 reagent, but almost an prompt reaction in SN1 reagent. The reasons ar very much(prenominal) the corresponding with bromocyclopentane above ? steric strain.
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As bromocyclohexane is bigger than that of bromocyclopentane, the steric in bromocyclohexane is too much for the nucleophillic attack from the opposite array of the leaving Bromine. In the end, plainly SN1 reaction could pass this nucleophillic substitution. 2-bromobutane undergoes a slow SN2 reaction, but shows an neighboring(a) result in SN1 reaction. As 2-bromobutane consists of secondary bromine, both SN1 and SN2 could happen. The sicken for this reaction should be NaBr and AgBr. On the other hand, 2-chlorobutane undergoes an even... If you want to expire a full essay, specify it on our website: Ordercustompaper.com

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