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CHEM 219 / CHEM219 Module 4: (NEW 2025/ 2026 Update) 100% Correct - Portage Learning
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Rankl thel followingl substratesl accordingl tol theirl increasingl ratel ofl reactionl (slowestl tol fastest)l inl anl Sn2l substitutionl reaction.l Brieflyl explainl yourl ranking Answer: B,l A,l C,l D
Partl 2 Answer: B,l A,l D,l C
Considerl thel substitutionl reactionl ofl 1 - bromobutanel withl hydroxidel ion.l Assumingl nol otherl changes,l whatl effectl onl thel ratel wouldl resultl froml simultaneouslyl doublingl thel concentrationsl ofl bothl butyll bromidel andl hydroxidel ion?l Brieflyl explain Answer: D)l Itl wouldl increasel thel ratel fourl times.l Ifl thel concentrationsl ofl bothl arel increasel thenl itl willl bel increasesl byl four.
Questionl partl 2 Answer: Itl wouldl increasel thel ratel fourl times
Identifyl nucleophile,l substrate,l leavingl group
Functionall group Answer: nitrile
Howl manyl differentl alkenel products Answer: a)l twol differentl
b)l threel different
T/Fl inversionl ofl geometryl isl typicallyl associatedl withl thel Sn2l mechanism Answer: True
T/Fl Thel usel ofl weakl basesl asl nucleophilesl promotesl eliminationl overl substitutionl inl mostl cases Answer: False
Identifyl strongerl nucleophile.l Explain Answer:
Al isl tool bulky,l andl Bl isl notl hindered
Howl wouldl itl affectl thel overalll ratel ofl reactionl ifl onel simultaneouslyl doubledl thel concentrationl ofl 2 - chloro- 2 - methylpentanel andl iodidel ion Answer: Thel ratel wouldl double
Namel eachl ofl thel followingl usingl IUPACl systemicl nomenclaturel methodology Answer: a)l trans-1,2-dichlorocycopentanel b)l 2,2-dibromo- 3 - ethyl- 5 - fluorohexanel c)l 1,2,4-trichlorobenzene
Classifyl eachl alkyll halidel asl primary,l secondary,l orl tertiary Answer: a)l secondaryl b)l tertiaryl c)l secondaryl d)l primary
Questionl Partl 2 Answer: a)l secondaryl b)l tertiaryl c)l secondaryl
b)l 3
T/Fl Thel "1"l inl Sn1l meansl thatl isl mechanisml occursl inl al singlel step Answer: False
T/Fl Thel usel ofl strongl basesl nucleophilesl promotesl substitutionl overl eliminationl inl mostl cases Answer: False
T/Fl Bulkyl substratesl preferl tol reactl byl Sn1l orl E1l mechanicsl whenl al weakl nucleophilel isl used Answer: True
T/Fl thel firstl stepl inl Sn2l orl E2l mechanisml isl thel departurel ofl thel leavingl group Answer: False
Identifyl thel strongerl nucleophilel inl eachl pairl below Answer: Hydroxidel isl strongerl because:l itl isl negativelyl chargel andl needsl al positivel chargel Bisulfidel isl strongerl because:l itl isl largerl andl hasl lessl electronegativity
Classifyl thel followingl solventsl asl proticl orl parotic.l Wouldl thisl solventl enhancel thel ratel ofl anl Sn1l orl anl Sn2l reaction
Answer: Cyanidel ion:l Nucleophilel iodocyclohexane:l substratel iodine:l leavingl group
Inl thel followingl reaction,l identifyl thel nucleophile,l substrate,l andl leavingl group Answer: Ammonia:l nucleophilel 1 - bromopropane:l substratel bromine:l leavingl group
Forl thel followingl reaction,l predictl whatl functionall groupl thel productl ofl thel creationl wouldl contain.l Notel thatl youl arel notl beingl askedl tol generatel thel IUPACl namel ofl thel product,l simplyl tol statel whatl functionall groupl itl wouldl contain
Answer: Alcohol
Questionl partl 2 Answer: Ester
