+ H, AH° = -127 kJ/mol but-1-ene + H2 AH° = -120 kJ/mol cis-but-2-ene

1,4-Pentadiene (CH2=CH-CH2-CH=CH2) is a liquid at room temperature and has a density of 0.66 g/mL and molar mass of 68.12 g/mol. In a laboratory experiment, 3.80 mL of this compound was treated with 4.80 mL of conc. H2SO4 (100% w/w; molar mass 98.08 g/mol). Note that the density of conc. H2SO4 is 1.84 g/mL. The resulting sulfate ester was then treated with 1.20 mL of water (molar mass 18.02 g/mol) affording, after work- up, 2,4-pentanediol (molar mass 104.15 g/mol) as the crude product. The crude product was then purified by simple distillation, which yielded 2.00 g of pure product.  What is the theoretical yield of 2,4-pentanediol expressed in grams? Show calculations.   What is the percentage yield of pure 2,4-pentanediol?

The hydrogenation of 3-carene can yield two stereoisomeric alkane products. The reaction only yields one of the two products. Please draw the structures and circle the product formed and explain your choice.

Draw the structure of (3E)-3,7-dimethylocta-1,3,6-triene Draw the cis and trans isomers of pent-2-ene and label them.

Indicate which of the following compounds show geometric (cis-trans) isomerism, draw the isomeric structures, and specify each as Z or E.  2-pentene  1-chloro-2methylbutene  2-bromo-1-chloro-1-hydroxypropene    Draw all possible isomers of the following compound  2,5-dimethyl-3-hexene  2-isobutyl-3-methyl-1-hexene    Draw the structural isomers of C4H7I. How many can exist as geometric isomers?  Identify the picture of each pair of compounds below as identical, structural isomers, geometric isomers or not related.

Why is a 1, 3 - cis disubstituted cyclohexane more stable than its trans isomer?

Which of the following is probed by UV- vis spectroscopy? A) Bond stretches B) Bond vibrations C) Electronic transitions D) Molecular rotation

1,4-Pentadiene (CH2=CH-CH2-CH=CH2) is a liquid at room temperature and has a density of 0.66 g/mL and molar mass of 68.12 g/mol. In a laboratory experiment, 3.80 mL of this compound was treated with 4.80 mL of conc. H2SO4 (100% w/w; molar mass 98.08 g/mol). Note that the density of conc. H2SO4 is 1.84 g/mL. The resulting sulfate ester was then treated with 1.20 mL of water (molar mass 18.02 g/mol) affording, after work- up, 2,4-pentanediol (molar mass 104.15 g/mol) as the crude product. The crude product was then purified by simple distillation, which yielded 2.00 g of pure product.   a.  Provide a balanced chemical equation to show the reaction between 1,4-pentadiene and sulfuric acid. Do not use molecular formulas in the chemical equation except for sulfuric acid.   b.  What reactant is the limiting reagent in this chemical equation? Show calculations to support your answer.

Compounds X and Y have the formula C6H12- Both X and Y react with one molar equivalent of hydrogen in the presence of a palladium catalyst to form 2-methylpentane. The heat of hydrogenation of X is less than that of Y. X and Y react with HBr to form a mixture of the same bromoalkanes, and they both undergo hydroboration/oxidation to give a mixture of the same alcohols. What is the structure of Y? In cases where there is more than one answer, just draw one. n. n [ ]# ChemDoodleⓇ za

Alkenes can be converted to alcohols by reaction with mercuric acetate to form a β-hydroxyalkylmercury(II) acetate compound, a reaction called oxymercuration. Subsequent reduction with NaBH4 reduces the C–Hg bond to a C–H bond, forming the alkyl alcohol, a reaction called demercuration. Draw the structures of the Hg-containing compound(s) and the final alcohol product(s) formed in the following reaction sequence, omitting byproducts. If applicable, draw hydrogen at a chirality center and indicate stereochemistry via wedge-and-dash bonds.