# What are some common chemical shift ranges in C^13 NMR spectrum?

Nov 8, 2015

See below.

#### Explanation:

• $160 - 220 \textcolor{w h i t e}{X} \text{C=O}$
• $115 - 150 \textcolor{w h i t e}{X} \text{C=C, C≡N}$
• $10 - 90 \textcolor{w h i t e}{X X} \text{Alkane C}$

Each of these ranges is further subdivided. For example,

160-220 ppm Range

• $205 - 220 \textcolor{w h i t e}{X} \text{RCOR}$
• $190 - 200 \textcolor{w h i t e}{X} \text{RCHO}$
• $160 - 185 \textcolor{w h i t e}{X} \text{RCOOH, RCOOR}$

10-90 ppm Range

• $50 - 90 \textcolor{w h i t e}{X} \text{RCH"_2"O}$
• $30 - 60 \textcolor{w h i t e}{X} \text{RCH"_2"Cl}$
• $25 - 35 \textcolor{w h i t e}{X} \text{R"_3"CH}$
• $16 - 25 \textcolor{w h i t e}{X} \text{RCH"_2"R}$
• $10 - 15 \textcolor{w h i t e}{X} {\text{RCH}}_{3}$

These ranges are often presented in a chart like the one below.

Even this limited information might enable you to match the carbon atoms to their corresponding peaks in the NMR spectrum of methyl methacrylate.