Oxidation

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

Card preview (24)

Front (Question)

What does a secondary alcohol oxidise to?

Back (Answer)

Ketone

Front (Question)

What is the colour change when a secondary alcohol is oxidised?

Back (Answer)

Orange to green

Front (Question)

What oxidising agent is used for alcohols?

Back (Answer)

a chromium (6+ ) reagent Na2Cr2O7

Front (Question)

Why is the oxidation of secondary alcohols a bad process?

Back (Answer)

Lots of Cr waste is generated

Front (Question)

What alternative name does the oxidation of a secondary alcohol have?

Back (Answer)

Jones oxidation

Front (Question)

How many chromate molecules are used in the Cr(VI) oxidation ?

Back (Answer)

Front (Question)

What is the order of the oxidation states for the Cr(VI) oxidation mechanism?

Back (Answer)

Cr (VI) Cr (IV) Cr (III)

Front (Question)

In the mechanism for the Cr (VI) oxidation, what is the key oxidising agent?

Back (Answer)

CrO3

Front (Question)

What does a primary alcohol oxidise to initially?

Back (Answer)

Aldehyde

#10

Front (Question)

How does a primary alcohol oxidise to a carboxylic acid (final oxidation state)?

Back (Answer)

First it is oxidised to an aldehyde, then a water molecule is added which forms a hydrate (two OH), then the hydrate is oxidised to form the carboxylic acid

#11

Front (Question)

What is a jones reagent?

Back (Answer)

Reagent involved in the oxidation of primary and secondary alcohols

#12

Front (Question)

What type of reagent oxidises hydrates?

Back (Answer)

Jones reagents

#13

Front (Question)

Alcohols can be oxidised to aldehydes under basic conditions, what reagent would be used in this instance?

Back (Answer)

Pyridinium chlorochromate PCC

#14

Front (Question)

Apart from basic, what other conditions would you need to use when using PCC?

Back (Answer)

Anhydrous

#15

Front (Question)

How are alkenes oxidised?

Back (Answer)

Through epoxidation uses peracid RCO3H C-O bonds form through syn addition

#16

Front (Question)

What type of reaction is synaddition, what does this mean?

Back (Answer)

Sn2 there will be an inversion of stereochemistry

#17

Front (Question)

What are the issues with using Osmium Tetroxide?

Back (Answer)

Rare Expensive Sublimes straight to gas

#18

Front (Question)

What are the issues with using Osmium Tetroxide for oxidation of alkene?

Back (Answer)

Rare Expensive Sublimes straight to gas

#19

Front (Question)

What happens when osmium tetroxide is used for oxidation of alkene?

Back (Answer)

C-O bonds are formed in syn addition Forms cyclic osmate ester through hydrolysis of the ester

#20

Front (Question)

What is the product when you use osmium tetroxide to oxidise an alkene?

Back (Answer)

syn-1,2-diol

#21

Front (Question)

What issues can Os (VI) cause?

Back (Answer)

Reduced to a metal so it forms a metal sheen across the eyeball if it comes close

#22

Front (Question)

What type of osmium is needed for the catalytic version of oxidation of the alkene?

Back (Answer)

Only catalytic OsO4 is needed

#23

Front (Question)

In the catalytic version using osmium tetroxide, what is the oxidising agent?

Back (Answer)

NMO

#24

Front (Question)

In the catalytic version, what oxidation happens inside of the reaction?

Back (Answer)

Oxidation of Os (VI) back to Os (VIII)