Question

6. Treatment of 1 mole ot dimethyl sulfate with 2 moles of sodium acetylide results in the formation of two moles of propyne as the major product. Draw a reasonable mechanism accounting for the formation of the byproduct 2-butyne. J. Org. Chem. 1959, 24, 840-842. (12 points) major product (2 moles) byproduct (1 equiv) (2 equiv) 7. At high temperatures, alkanes can undergo dehydrogentation to produce alkenes. This reaction is used industrially to prep Explain why dehydrogenation only works at high temperatures using approximately 20 words or less. (5 points) are ethylene while simultaneously serving as a source of hydrogen gas. НН 750 C 8. Compound A has a molecular formula of CsHa. Hydrogenation of compound A under Lindlar's conditions produces a branched alkene B that is neither E or Z. Hydroboration-oxidation of compound A produces an aldehyde C. Draw the structures of compounds A, B, and C. (3 points)

Answer 1

Majos" product トーニ日 May CH,-- 込 an es esuil4nt DBE- 202-H one Jkyne . sives neitesEc①と kenes ( do Lindiass ydsog enoton Produc ue to tesminet alkyne Basoq gives add hyde ony tesminol alkyne gives aldehyte