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Page - 2 - of 9 2A) Draw the concerted mechanism and the oxirane (epoxide) products...
Page - 2 - of 9 2A) Draw the concerted mechanism and the oxirane (epoxide) products that can form on EACH face of the alkene. Here, we use trifluoro-per-acetic acid and (Z)-but-2-ene. [The important oxygen atom is filled in...] CF 2B) (CIRCLE ONE or more...) The above pair of epoxide possibilities are: enantiomers / diastereomers / conformers / identical / meso / entgegen / zusammen 2C) (CIRCLE ONE) How many stereochemical products can be formed in this specific particular reaction?...
Page - 5 - of 9 5A) DRAW expected product(s). INCLUDE stereochemical outcomes if they occur... Starting Material Reagents or Reaction KMnO4 Both final products Carbene 1 Rxn: Dimethyl carbene (singlet HC CHE Both products Carbene 2 Rxn: Dimethyl carbene [ singlet ] ㅂ H₃C. CH, Product or products... Carbene 3 Rxn: Dimethyl carbene [ triplet HC CH3 Product or products... 5) What is the relationship of the products in "Carbene 1 Rxn" ? identical enantiomers diastereomers meso not related...
Page - 3 - of 9 ЗА) To get an anti - 1, 2 diol configuration, you have to go through an epoxide ring-opening reaction. In class, we showed this reaction happening in acidic or in basic conditions with a different mechanism. Below, DRAW a good arrow-pushing mechanism, showing all steps, for the epoxide ring- opening under both conditions, separately. Of course, the same two (2) products form in either mechanism below. Mechanism: OH-/H2O H2O + mil H-O O Mechanism:...