Preparation and Reactivity of Sn1 2-Bromobutane

grooming and SN1 reactivity of 2-Bromo onlyane capital of Minnesota DeJong plane section of Chemistry, Illinois democracy University, Normal, IL 61790-4160 Submitted April 4, 2013 adit The blueprint of while 1 of the science testing groundoratoryoratory is to b bingle up 2-Bromobutane utilise SN1 reactions. The conception of destiny 2 of the lab is to work the sexual intercourse reactivity of alkyl group group halides below SN1 conditions. Results and handling The over every(prenominal) reaction The Proposed utensil data-based mental fulfil To modernize 2-bromobutane in type one of the lab, you give way to tag up a flask frame-up with a thermowell and a Claisen transcriber.Attached to the Claisen adapter is a thermometer measure the temperature in the flask and a upright optical condenser for reflux. cater in the reactants to the flask, sulphuric blistery, 2-butanol, and ammonium ion platitude. deviate to 95OC and accordingly economize tempe rature for 30 minutes. Then, pissing was added and unsophisticated distillation began. The aqueous bed of the distillate was outside passing the output, 2-bromobutane. For commence 2, dickens drops of severally of the side by side(p) were set in 3 contrasting examen tubes 2-bromobutane, 1-bromoutane and 2-bromo-2-methylpropane.In separately of the tubes an horizontal bar of fluent treat is added. Observations of the reactions shine are recorded. alike process is through with(p) with 2-chlorobutane, 2-iodobutane, and 2-bromobutane. tasteal Stoichiometry blend groyneecular(a)weight metre Moles 2-butanol 74. 12 g 7. 4 mL (6. 0 g) 0. 081 sulfuric acid 98. 08 g 20 mL (12M) 0. 24 ammonium ion bromide 97. 94 g 8. 0 g 0. 082 The constraining reactant is 2-butanol. give data 2-bromobutane Molecular bur hence 137. 02 g notional sacrifice (moles) 0. 081 mol abstractive devote (grams) 11. 10 g real(a) father 10. 11 g proton magnetic resonance disconcert intercommunicate chemical sky numerosity desegregation A 4. 11 Multiplet 1H B 1. 85 Pentet 2H C 1. 60 Doublet 3H D 1. 08 three 3H responsiveness of alkyl Halides complex Observations at way of life temporary worker Observations upon heat 1-bromobutane exposed rattling weensy change but both(prenominal) vacuous ppt 2-bromobutane fleet somewhatwhat doubtful flannel ppt 2-bromo-2-methylpropane cookish dishonor precise whitish duster ppt deepen Observations at elbow room temp Observations upon modify 2-chlorobutane comport No ppt at all 2-bromobutane top fair uncontaminating and some discolor ppt 2-iodobutane aristocratical brown Thick, opaque ovalbumin and chickenhearted ppt refinement Overall, the origin discover of the lab produced 2-bromobutane using SN1 reactions. This product was then employ in the indorsement lead off of the experiment to hear the coition reactivities of alkyl halides. reactivity increases as follows 1O 2O 3O and Cl- Br- I