212Lec7Sp09MS - Group Question #3 Annotate (label) the...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Group Question #3 Annotate (label) the significant bond stretches in the following IR spectrumf for ethyl propiolate.; to do this, draw out the bond (e.g. O-H) near its signal and draw an arrow from the bond to its signal. (8 pts: 4 pts for attendance; 4 pts for problem) C-H C C C=O C-O Results given at lecture!
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Today’s agenda… IR Summary Mass Spectrometry (12.1-12.3) Last time… 13 C NMR IR Spectroscopy (12.6-12.8) Group Question #3 Lecture 7
Background image of page 2
IR Spectra: What you can tell at a glance 1. Is a C=O present? Look for a strong peak at 1820-1660 cm -1 . 2. If C=O is present, check the following: ACIDS: Is O-H also present? AMIDES: Is N-H also present? ESTERS: Is C-O also present? ANHYDRIDES: Two C=O absorptions? ALDEHYDES: Is aldehyde C-H present? Two weak absorptions near 2850-2750 cm -1 (on right side of aliphatic C-H absorptions) KETONES: Preceding five choices have been eliminated 3. If C=O is absent, check the following: ALCOHOLS: AMINES: Check for N-H (medium) ETHERS: Check for C-O and absence of O-H
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
IR Spectra: What you can tell at a glance 4. Double bonds and/or aromatic rings. Check for C=C. 5.
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/25/2009 for the course CHEM 210 taught by Professor Maslak,przemyslaw during the Spring '08 term at Pennsylvania State University, University Park.

Page1 / 17

212Lec7Sp09MS - Group Question #3 Annotate (label) the...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online