We are studying nucleophilic substitution reactions. There are two primary mechanisms. SN1 and SN2.These reactions occur

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We Are Studying Nucleophilic Substitution Reactions There Are Two Primary Mechanisms Sn1 And Sn2 These Reactions Occur 1 (48.52 KiB) Viewed 46 times

We are studying nucleophilic substitution reactions. There are two primary mechanisms. SN1 and SN2.These reactions occur between an alkyl halide and a nucleophile. Sn1 mechanism have two steps, the first step is rate determining and forms a cation Intermediate. The rate depends solely on the concentration of the alkyl halide. Because the reaction goes through a cation and the geometry of a cation is trigonal planar, a nucleophile can attack from either face. This forms two enantiomers. 1) (R)-3-bromo3-methylhexane undergoes an Sn1 reaction with HO-.Draw the Fischer projection for the starting alkyl halide and the Fischer projections of the two enantiomers formed. Br HO HO- + SN2 mechanism have one-step, the nucleophile attacks the carbon bonded to the halogen from the backside and pushes the halogen out from the opposite side. Because of this method of attack, any stereochemistry is inverted in the product. 2) (R)-2-bromobutane reacts with HO-though an Sx2 mechanism. Draw the Fischer projection of the starting alkyl halide and the Fischer projection of the product. Br HO- HO- t