IR/NMR Spectroscopy

Question 0

Dead Giveaway: Downfield 1 H septet & Upfield 6 H doublet

Answer 0

Isopropyl Group

Question 1

Dead Giveaway: 5 hydrogen singlet

Answer 1

1-substituted aromatic hydrocarbon

Question 2

Useless IR Data:

Answer 2

C-H bonds at 3000cm^-1 or below

Question 3

Dead Giveaway: Downfield quartet, upfield triplet

Answer 3

Ethyl group

Question 4

Huge Peak in fingerprint region around 1100cm^-1

Answer 4

Typical C-O stretch

Question 5

Fat squat downfield singlet

Answer 5

-OH group

Question 6

1740cm^-1 sharp peak

Answer 6

Ester group

Question 7

Special coupling property of OH bonds

Answer 7

They do not couple with Hydrogens >= 3 bonds away

Question 8

2270cm^-1 Moderate peak

Answer 8

Nitrile group

Question 9

N+1 Rule

Answer 9

A hydrogen type will show N+1 peaks, where N is the number of hydrogen neighbors.

Question 11

The Nitrogen Rule

Answer 11

An odd molecular weight has an odd number of Nitrogens. An even molecular weight has either 0 or an even number of Nitrogens.

Question 12

1680cm-1 long peak

Answer 12

conjugated carbonyl

Question 13

-OH bond peak

Answer 13

must be huge

Question 14

coupling constants: ortho

Answer 14

8 hz

Question 15

coupling constants: meta

Answer 15

2 hz

Question 16

coupling constants: para

Answer 16

0hz

Question 17

Doublet of doublets at around 7-7.5

Answer 17

(Para) 1,4 disubstituted benzene

Question 18

Aldehyde

Answer 18

2900, 2800, 1710cm-1

Question 19

Lewis Acid

Answer 19

Lone pair acceptor

Question 20

Lewis Base

Answer 20

Lone pair donator

Question 21

First Order Splitting Criteria

Answer 21

The chemical shift difference&raquo_space; coupling constants

Question 22

How would one turn a 2nd order into a first order? (increase the visible distance between peaks)?

Answer 22

You can turn to a higher magnetic field strength

Question 23

1695cm-1

Answer 23

Aromatic ring