EXPLAIN THE MECHANISM OF EACH REACTION 1. Reaction of Dichlorocarbene H CH3CH₂ H CH3 cis-2-Pentene ⒸThomson-Brooks Cole Cyclohexene + CHCl3 + CHCI, CH3 CH3 2. Reduction of Alkenes: Hydrogenation KOH KOH I_ H H Pt H CH₂CH₂ H CI CI H CI Cl H CH3 + KCI + KCI H CH3 H CH3

Examine the following pericyclic reactions. For each reaction, tell whether it is an electrocyclic reaction, a cycloaddition reaction, or a sigmatropic rearrangement.

9. Draw the constitutional isomer formed when the following alkenes are treated with each set of reagents: [1] H20, H2SO4; or [2] BH3 followed by H2O2, "OH. A io onutouTC.rvinmmoo ewo ebyoleen.g er besibhoyn motis M doso al waH s b. a. Seblaar molsHsno isq onol nose 2eob isticho to eqyt ewni.d Cnistnoo ennug 29ob anodogle yoam woH.o O bns 18 to alnemala erlT nertw bemot witam-S ae doue anexie leohtemmyeni

Complete the following reactions by identifying the majority product(s) or the reaction conditions that are missing. No mechanism is needed

Identify the product.

8) Select the structure of the major product in the following reaction. H OH m-CPBA ? H OH I II III 0 IV V

Q10. How could the following compounds be prepared, using an alkene as one of the starting materials? a. ☐ -OCH3 d. CH₂CHCH2CH3 CH₁₂ b. CH3OCCH3 CH c. CH3CH₂OCHCH2CH3 CH3 e. OH OH f. CH3CH2CHCH2CH2CH3 OH

23) Which reaction will yield the following alkene as only elimination product? NaOEt A) Br E-3- Br NaOCH, B) KOIBU "Br KHSOJAT D) 24) What is the product of the following transformation? AgOH Br A) B) OH C) D) OH 25) Rank the following alkenes according to their heat of combustion from the LOWEST to the HIGHEST. II II IV A) II < IV < I< III B) III < I< IV < || C)I< || < IV < IIl D) II < IV < |I < I

Alcohols Reactions Note: Pyridine

Identify the correct structure of the alkene which gives the two electophilic addition products with HCl/ether.