IR Spectroscopy

0.0(0)
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/6

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

7 Terms

1
New cards

steps to use IR spectroscopy

  • clean the top plate with ethanol and allow the plate to air dry every time

  • inspect the underside of the press for any contamination

  • turn the press until the pressure indicator in the screen in about halfway green

    • If the pressure indicator turns red, you need to unscrew the press. The anvil can crack.

2
New cards

percentage transmittance.

  • How much of a particular frequency gets through the compound

3
New cards

fingerprint region.

  • The region to the right-hand side of the diagram (from about 1250 to 400 cm-1)

  • The pattern in the fingerprint region is completely different and could therefore be used to identify the compound.

4
New cards

functional group region

  • 4000 cm^-1 to 1250 cm^-1

5
New cards

the more H-bonding, the ___ in the functional group region

  • the wider the peaker

  • the greater the absorption

6
New cards

what if we have peaks that aren’t supposed to be therer?

  • that means impurities are present

  • leftover starting material

7
New cards

IR rules

  1. clean the area around the instrument

  2. clean the instrument with isopropyl alcohol

  3. don’t wear gloves

  4. follow instructions above computers

  5. look at IR after it printed