Rank the following alkenes in order of their heats of hydrogenation (1 = lowest, 4 = highest).

Which of the following additions to alkenes occur(s) specifically in an anti fashion? I am referring to anti/syn stereochemistry in this question, not the Markovnikov-based regiochemistry. O addition of H2 O halohydrin formation O hydroboration-oxidation O dihydroxylation using OsO4

Label the following alkenes from most stable, moderate and least stable.

From which alkene can the following alkyl halides be obtained? a) 3-chloro-3-methylpentaneb) 1-bromo-1-ethylcyclopentanec) 1-chloro-3-methylcyclohexaned) 1-ethyl-1-iodocyclohexanec) 1-bromo-3-ethylpentane

МСРВА Alkenes are oxidized to give epoxides on treatment with a peroxyacid, RCO3H, such as metachloroperoxybenzoic acid (MCPBA). Peroxyacids transfer an oxygen atom to the alkene with syn stereochemistry, i.e. both C-O bonds form on the same face of the double bond, through a single step mechanism without intermediates. The oxygen atom farthest from the carbonyl group is the one transferred. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions H .CI .CI HO

Rank the following alkenes in order of increasing stability (least to most stable) I II III IV

nent/takeCovalentActivity.do?16cal assigi [Review Topics] [References] Use the References to access important values if needed for this question. Draw a structural formula for the major organic anion formed when 2- ethylbutanal is reacted with Tollens' reagent. You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • If no reaction occurs, draw the organic starting material. P. opy aste CH4 ChemDoodle Previous Nex

For each reaction, decide whether substitution or elimination (or both) is possible, andpredict the products you expect. Label the major products.  chlorocyclohexane + NaOC(CH3)3 in (CH3)3COH

Q 8 please

State what alkene or alkyne (with only carbons and hydrogens) and what other reactants you should use to most effectively synthesize the following in the fewest number of steps and with the highest yield. H;C-CH,- C CH3