Spectroscopy

Question 1

-OH

Answer 1

large, broad trough far to the left 3000-3600 cm

Question 2

Nitrile

Answer 2

medium-sized peak at ~2200

Question 3

Carbonyl C=O

Answer 3

big, pointy peak at 1700 ± 50

Question 4

C-H bonds

Answer 4

3000 cm-1 region

Question 5

C=C bonds (alkenes) and C=N bonds (imines)

Answer 5

1600 cm-1

Question 6

Infrared (IR) light is used to induce ______ transitions in molecules.

Answer 6

vibrational

Question 7

UV light is used to induce ______ transitions in molecules.

Answer 7

electronic

Question 8

The iodoform test (I2/OH-) reacts with methyl ketones to form a _____ precipitate. It forms _____

Answer 8

yellow, ICH3

Question 9

to be resonance stabilized, the +/- charge MUST be ____ position away from the double bond

Answer 9

ONE

Question 10

Spectrophotometry

Answer 10

is a laboratory technique that measures the absorption spectrum of different molecules.

Question 11

Polarimetry

Answer 11

is a technique that measures the optical activity (chirality)

Question 12

Tollens test

Answer 12

Aldehydes!