Exam 4

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

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Front (Question)

explain what is necessary for hydrogenation of alkenes/alkynes

Back (Answer)

H2 a catalyst solvent heat pressure 2 equiv. if taking alkyne to alkane

Front (Question)

hydrogenation is (reduction/oxidation)

Back (Answer)

reduction

Front (Question)

heterogenous hydrogenation catalysts

Back (Answer)

Pd, Pt, Ni

Front (Question)

Wilkinson’s catalyst: - formula - type of catalyst

Back (Answer)

Rh(PPH3)3Cl homogeneous hydrogenation catalyst

Front (Question)

homogeneous hydrogenation catalyst

Back (Answer)

Wilkinson’s

Front (Question)

hydrogenation with a metal catalyst is (anti/syn)

Back (Answer)

syn

Front (Question)

How to accomplish cis partial hydrogenation of alkyne?

Back (Answer)

Lindlar’s catalyst P-2 catalyst

Front (Question)

Lindlar’s catalyst: - formula - use

Back (Answer)

Pd/CaCO3 + quinoline used to hydrogenate alkyne to cis alkene

Front (Question)

P-2 catalyst: - formula - use

Back (Answer)

Ni2B used to hydrogenate alkyne to cis alkene

#10

Front (Question)

How to accomplish trans partial hydrogenation of alkyne?

Back (Answer)

metal ammonia —Li, Na, or K + NH3 or RNH2

#11

Front (Question)

what is dissolving metal reduction?

Back (Answer)

partial hydrogenation of alkyne to give trans alkene

#12

Front (Question)

temp needed for dissolving metal reduction

Back (Answer)

cold

#13

Front (Question)

hydrogenation using radical mechanism

Back (Answer)

dissolving metal reduction; metal has one electron; attacks twice

#14

Front (Question)

sodium borohydride reduction —solvents

Back (Answer)

water alcohol ethers

#15

Front (Question)

LAH reduction —solvents you cannot use

Back (Answer)

water alcohols (reacts explosively)

#16

Front (Question)

carbene structure

Back (Answer)

#17

Front (Question)

carbene acts as (Nu/El)

Back (Answer)

either one!

#18

Front (Question)

3 methods of carbene addition

Back (Answer)

1) diazomethane 2) SImmons-Smith 3) Alpha elimination

#19

Front (Question)

Diazomethane reagent

Back (Answer)

#20

Front (Question)

diazomethane conditions required

Back (Answer)

heat or light

#21

Front (Question)

problems with diazomethane

Back (Answer)

very explosive & toxic carbene can also insert into C-H bonds

#22

Front (Question)

Simmons-Smith reagent

Back (Answer)

ICH2ZnI

#23

Front (Question)

“figure 8” transition state

Back (Answer)

Simmons-Smith

#24

Front (Question)

Alpha elimination reagent

Back (Answer)

haloform (CHX3) OH-