Oxygen Bearing Compounds

3/5/2011

EXPERIMENT

EXPERIMENT

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OBJECTIVES CONCEPTS REAGENTS PROCEDURE RESULTS DISCUSSION IR ANALYSIS

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Objectives to differentiate various types of oxygen-bearing organic compounds to device a scheme to distinguish each functional group

Analysis of Oxygen-bearing Organic Compounds [e-mail] OBJECTIVES CONCEPTS REAGENTS PROCEDURE RESULTS DISCUSSION IR ANALYSIS

to characterize an unknown sample through parallel chemical tests

ARMSALCEDO

ARMSALCEDO

[e-mail]

EXPERIMENT

EXPERIMENT

8
OBJECTIVES CONCEPTS REAGENTS PROCEDURE RESULTS DISCUSSION

Reagents
OH

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OBJECTIVES

Reagents
Chemical Analysis
Anhydrous ZnCl2 10% KI 10% K2Cr2O7 6M H2SO4 6M 6M NaOH conc. HCl DNPH reagent Tollen’s reagent 5% aq. NaClO

OH
CONCEPTS

HO
1° alcohol 2° alcohol 3° alcohol

REAGENTS PROCEDURE

O

O

RESULTS DISCUSSION

H
IR ANALYSIS

H
Ketone
IR ANALYSIS

Aldehyde

ARMSALCEDO

[e-mail]

ARMSALCEDO

[e-mail]

EXPERIMENT

EXPERIMENT

8
OBJECTIVES CONCEPTS REAGENTS PROCEDURE RESULTS DISCUSSION SUMMARY

Procedure
Schematic Analysis
Sample Dichromate test Green soln Yes 1°/2° alcohols, aldehyde Tollen’s test Silver mirror Yes Aldehyde No 1°/2° alcohols Lucas test No 3°/ketone DNPH test Orange ppt Yes Ketone No 3° alcohol

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OBJECTIVES CONCEPTS REAGENTS PROCEDURE RESULTS DISCUSSION IR ANALYSIS Turbid fast Yes 2° alcohol [e-mail] ARMSALCEDO

Discussion
Dichromate Test (Jones oxidation)
REAGENTS: 10% K2Cr2O7, 6M H2SO4 POSITIVE FOR: 1 and 2 alcohols, aldehydes POSITIVE RESULT: green to blue solution REACTION:
R OH R K2Cr2O7 H2SO4 R R O + 6H2O + Cr2(SO4)3 green

No

1° alcohol

ARMSALCEDO

[e-mail]

1

3/5/2011

EXPERIMENT

EXPERIMENT

8
OBJECTIVES CONCEPTS REAGENTS PROCEDURE RESULTS DISCUSSION IR ANALYSIS

Discussion
Tollen’s Test
REAGENTS: 1% AgNO3, 6M NaOH, conc. NH4OH POSITIVE FOR: aldehydes POSITIVE RESULT: silver