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Account for the regioselectivity and stereoselectivity observed when 1-methylcyclopentene is treated with reagent.
Q) BH3
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- Account for the regioselectivity and stereoselectivity observed when 1-methylcyclopentene is treated with reagent Q.Hg(OAc)2 in H2ODraw the products formed when both cis- and trans-but-2-ene are treated with a peroxyacid followed by -OH (in H2O).Explain how these reactions illustrate that anti dihydroxylation is stereospecic.Two diastereomeric sets of enantiomers, A/B and C/D, exist for 3-bromo-2-butanol. When enantiomer A or B is treated with HBr, only racemic 2,3-dibromobutane is formed; no meso isomer is formed. When enantiomer C or D is treated with HBr, only meso 2,3-dibromobutane is formed; no racemic 2,3-dibromobutane is formed. Account for these observations.
- How many stereoisomers are formed from the reaction of 3-methylcyclohexene with NBS?Draw the product obtained when cis-2-butene is treated first with Br2 in CH2Cl2, second with NaNH2 in NH3, and then finally with Li in NH3.(a) What product(s) are formed when the E isomer of C6H5CH = CHC6H5 is treated with Br2, followed by one equivalent of KOH? Label the resulting alkene(s) as E or Z. (b) What product(s) are formed when the Z isomer of C6H5CH = CHC6H5 is subjected to the same reaction sequence? (c) How are the compounds in parts (a) and (b) related to each other?
- Which of the possible stereoisomers are formed by oxidation of (S )-4-methylcyclohexene with osmium tetroxide? Is the product formed optically active or optically inactive?What is the major product formed when 3-methyl-1-butene is treated with Hg(C2H3O2)2 in a THF/ethanol mixture followed by NaBH4 in base?Draw the organic products formed when cyclopentene is treated withfollowing reagent. [1] O3; [2] CH3SCH3
- Consider a reaction where cis-but-2-ene is treated with OsO4 followed by NaHSO3/H2O. Draw the structure of one product that is formed in the reaction, including correct stereochemistry.What organic product is formed when 1‑methylcyclopentene is treated with NMMO in the presence of H2O and a catalytic amound of OsO4? Clearly show stereochemistry by drawing a wedge and dashed bond for each chiral carbon. Only draw one stereoisomer if more than one can be formed.Friedel–Crafts alkylation of benzene with (R)-2-chlorobutane and AlCl3 affords sec-butylbenzene. How many stereogenic centers are present in the product?