Lecture 10 - TODAY Review of Main NMR concepts Intro to 13C...

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TODAY Review of Main NMR concepts Intro to 13 C NMR 1 Sample Preparation Problem Solving
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1 H NMR Spectrum Nuclear Magnetic Resonance (NMR) – probing nuclei ( 1 H, 13 C) 2 13 C NMR Spectrum
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Three Fundamental NMR Parameters 1. Chemical shift (ppm scale) – Functional group information. 2. Intensity information (vertical scale) –(# f equivalent hydrogens). 3 of equivalent hydrogens). 3. Peak Multiplicity: Nearest neighbour analysis – bond connectivity.
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Introduction to Carbon-13 NMR • Developed much later than 1 H NMR. Why? – Only 1% of carbons are 13 C (NMR active), whereas almost 100% of hydrogens are 1 H (NMR active) 4 – So you need 100 times more sample (in principle) or a new methodology to see 13 C signals…. . – FT-NMR (Fourier Transform) is the new technique look at entire spectrum many times and sum. – Old technique was Continuous Wave (CW). Scan through the spectrum once.
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Can we observe 13 C nuclei independent of 1 H nuclei? • Yes, because
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This note was uploaded on 09/09/2010 for the course CHEM CHEM 2204 taught by Professor Peterbuist during the Summer '10 term at Carleton.

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Lecture 10 - TODAY Review of Main NMR concepts Intro to 13C...

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