The trans diaxial geometry for the E2 elimination in chlorocyclohexane. Define this ?

Measure the C-C-C and C-C-H bond angles in the energy-minimized model of cyclohexene and compare them with those predicted by VSEPR. Explain any differences.

Draw and name four terminal alkynes with the molecular formula C6H10.

∆H° values obtained for a series of similar reactions are one set of experimental data used to determine the relative stability of alkenes. Explain how the following data suggest that cis-but-2-ene is more stable than but-1-ene (Section 12.3A).

How many cis,trans isomers are possible for the structural formula you propose?

contains a tertiary carbon. H-C=C-CH3 O bromocyclohexane O CH2=CH-CH=CH-CH=CH2 O C6H5-CH2-Br O 2-iodopentane

Draw six isomeric cyclopentanes of molecular formula C7H14. These will include four constitutional isomers, of which two show geometric (cis-trans) stereoisomerism.

(a) • All hydrogen atoms are implied. • You do not have to consider stereochemistry. • Omit lone pairs and radical electrons from your answer. 3-ethyl-3-pentanol Draw the structure of the alkene that was used to prepare the alcohol in highest yield. -8) O GA + H₂C * Cat CH₂ ? ChemDoodle Which process does this employ? 01. Hg(OAc)2, H₂O; 2. NaBH4 01. BH3; 2. H₂O2, NaOH OOSO4, H₂O2 Y

12. Which of the following carbocations is the least stable one? 13. The heats of complete hydrogenation of the following three hydrocarbons are 105, 116, 275 and 292 (in kJ/mol). Which hydrocarbon does feature the heat of hydrogenation of 292 kJ/mol?

cỌH CH OH ОН Н Ha ОН In its most stable chair conformation, indicate the orientation of each of the labeled groups in this substituted cyclohexane. Group a: equatorial Group b: axial Group c: equatorial