CHEM 30B  Dr. R. Rinehart

ALDEHYDES AND KETONES

Record your observations on the DATA SHEET

See below for additional information

compound

& structure

class

ald  or  ket

state
and color

odor

describe

solubility

misc, vs, s, sls, i

iodoform

+ = yellow ppt

Benedict’s

+ =  orange ppt

2,4-DNPH

record color of ppt

acetone

 

 

 

 

 

 

 

acetophenone

 

 

 

 

 

 

 

 

benzaldehyde

 

 

 

 

 

 

 

2-butanone

 

 

 

 

 

 

 

camphor

 

 

 

 

 

 

 

cinnamaldehyde

 

 

 

 

 

 

 

cyclohexanone

 

 

 

 

 

 

 

D-glucose 

 

 

 

 

 

 

 

propanal

 

 

 

 

 

 

 

vanillin 

 

 

 

 

 

 

 

 

 

 

See details on the Tollens procedure and a video by Peter Keusch at the University of Regensburg at
http://www.uni-regensburg.de/Fakultaeten/nat_Fak_IV/Organische_Chemie/Didaktik/Keusch/D-Tollens-e.htm
and on Fehling's test [very similar to Benedict's test] at
http://www.uni-regensburg.de/Fakultaeten/nat_Fak_IV/Organische_Chemie/Didaktik/Keusch/D-Fehling-e.htm

 

 

 

 

While we will not have a workshop tonight, you may find it worthwhile to complete the Chime exercises for Chapter 14 at Cabrillo College. Using Netscape*, go to http://c4.cabrillo.edu/chem30b/exercises/exerhome.html . In the list under “Chime exercises,”  select  Chapter 14. There are nine exercises. Use the link on the Ch 14 index page to print your own worksheet; then answer the questions.
HINT: Use the right-click pop-up menu to change the display as needed. I suggest changing every display on each page to "Sticks" before doing anything else. Then rotate for best view. UNchecking the “Display Hydrogens” option is a big help in drawing line structures, but for some of these questions you may want to restore the H. You MUST indicate heteroatoms [and attached H] using their symbols.
 
 

© Ronald W. Rinehart, 2002, 2004  Close this window to return to class schedule or click here