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Which illustration shows the transition state for the addition of (S)-1-iodo-3-methylpentane to NaSCH3?

Rank the structures shown from most to least stable.

Given the bond dissociation energies below (in kcal/mol), estimate the ΔH° for the propagation step CH3CH2CH2—H                     98(CH3)2CH—H                           95Cl—Cl                                        58H—Cl                                       103CH3CH2CH2—Cl                       81(CH3)2CH—Cl                             80

What are the predicted products for the SN1 reaction shown?

Which choice shows the transition state for the given SN2 reaction?

Using the bond dissociation energies given, calculate ΔH° for the following reaction.   Bond A-B   ΔH° KJ/mol CH3CHICH2CH3 222 I-I 151 H-CH2CH2CH2CH3 397 H-I 297  

Select the word or phrase that complete each sentence (constitutional isomers, diastereomers, enantiomers, meso compounds, higher, lower, reaction, addition, carbocation, carbanion, nucleophile, electrophile, elimination, heterolysis, homolysis, reagent, substitution, stronger, weaker, charge, activation energy, enthalpy, entropy, catalyst, transition state, intermediate,  concerted, two step, SN1, SN2, E1, E2, racemization, hyperconjugation, alkyl halides, inversion):     A(An)…………………………….. speeds up the rate of a reaction by providing an alternative pathway with a lower energy of activation. Complete word/phrase and correct spelling (verbatim) is required. No partial credit.

Select the word or phrase that complete each sentence (constitutional isomers, diastereomers, enantiomers, meso compounds, higher, lower, reaction, addition, carbocation, carbanion, nucleophile, electrophile, elimination, heterolysis, homolysis, reagent, substitution, stronger, weaker, charge, concerted, two step, SN1, SN2, E1, E2, racemization, hyperconjugation, alkyl halides, inversion):     A(an) …………………………….. has an electron-deficient atom that is capable of accepting a pair of electrons. Complete word/phrase and correct spelling (verbatim) is required. No partial credit.

The motion picture, invented in 1889, developed as an important form of entertainment during the first decade of the 1900s. At first, the “nickelodeons,” as the early movie theaters were called, appealed mainly to a lower-class and largely ethnic audience. In 1902, New York City had 50 theaters; by 1908, there were more than 400 showing 30-minute dramas and romances. Not__________________ World War I, when D.W. Griffith produced long feature films did the movies begin to attract a middle-class audience.

The relative influence of a husband and wife on a particular consumer decision depends in part on the product category. ______________________, husbands often dominate the purchase of a new automobile, while the purchase of food and home furnishings is often wife-dominated.