Complete the following reactions, showing the major products and reaction names:

Here are the completed equations and the names of the major products: c) Step 1: The alkene undergoes syn dihydroxylation using osmium tetroxide (OsO_4) and pyridine. Step 2: The osmate ester is then cleaved by NaHSO_3/H_2O to yield a cis-diol. CH_3CH=CHCH_3 1. OsO_4, Pyridine Osmate ester intermediate 2. NaHSO_3/H_2O CH_3CH(OH)CH(OH)CH_3 Product name: Butane-2,3-diol d) Step 1: The alkene undergoes ozonolysis, cleaving the double bond. Step 2: Reductive workup with zinc and acetic acid converts the intermediate ozonide into carbonyl compounds. Since the alkene is tetrasubstituted, two molecules of ketone are formed. (CH_3)_2C=C(CH_3)_2 1. O_3, CH_2Cl_2 Ozonide intermediate 2. Zn, CH_3COOH, H_2O 2 CH_3COCH_3 Product name: Acetone (Propan-2-one) e) Step 1: The 1,2-diol undergoes oxidative cleavage with periodic acid (HIO_4). Step 2: This reaction breaks the carbon-carbon bond between the two hydroxyl-bearing carbons, opening the ring and forming a dicarbonyl compound. 1,2-dimethylcyclohexane-1,2-diol HIO_4, H_2O, THF CH_3COCH_2CH_2CH_2CH_2COCH_3 Product name: Octane-2,7-dione f) Step 1: Cyclohexene reacts with diiodomethane (CH_2I_2) in the presence of a zinc-copper couple (Zn(Cu)) in ether. Step 2: This is a Simmons-Smith reaction, which adds a methylene group across the double bond to form a cyclopropane ring. Cyclohexene + CH_2I_2 Zn(Cu), Ether Bicyclo[4.1.0]heptane Product name: Bicyclo[4.1.0]heptane g) Step 1: The alkene undergoes hydroboration with diborane (B_2H_6) in THF. This adds boron to the less substituted carbon. Step 2: Subsequent oxidation with hydrogen peroxide (H_2O_2) and sodium hydroxide (NaOH) replaces the boron with a hydroxyl group, resulting in an anti-Markovnikov addition of water. 2-methylpent-2-ene 1. B_2H_6, THF Organoborane intermediate 2. H_2O_2, NaOH CH_3CH_2CH_2C(CH_3)HCH_2OH Product name: 2-methylpentan-1-ol h) Step 1: 2,3-dimethylbuta-1,3-diene reacts with but-2-ene in a Diels-Alder cycloaddition. Step 2: This [4+2] cycloaddition forms a six-membered ring with a new double bond. 2,3-dimethylbuta-1,3-diene + CH_3CH=CHCH_3 1,2,4,5-tetramethylcyclohex-1-ene Product name: 1,2,4,5-tetramethylcyclohex-1-ene i) Step 1: Acetone reacts with a phosphonium ylide, which is generated in situ from triphenylphosphine (P(Ph)_3) and methyl bromide (CH_3Br). Step 2: This is a Wittig reaction, which converts a ketone into an alkene by replacing the carbonyl oxygen with the alkylidene group from the ylide. CH_3COCH_3 P(Ph)_3, CH_3Br CH_2=C(CH_3)_2 Product name: 2-methylpropene j) Step 1: Acetophenone reacts with phosphorus pentachloride (PCl_5). Step 2: This reaction replaces the carbonyl oxygen with two chlorine atoms, forming a geminal dichloride. Acetophenone PCl_5 C_6H_5CCl_2CH_3 Product name: 1,1-dichloro-1-phenylethane That's 2 down. 3 left today — send the next one.