ch. 15

Question 1

are kinetic or thermodynamic products formed in low temperatures

Answer 1

kinetic

Question 2

are kinetic or thermodynamic products formed in high temperatures

Answer 2

high

Question 3

are kinetic or thermodynamic products more stable

Answer 3

thermodynamic

Question 4

are kinetic or thermodynamic products formed faster

Answer 4

kinetic

Question 5

do kinetic or thermodynamic products need more Ea

Answer 5

thermodynamic

Question 6

is the diene or dienophile electron-rich

Answer 6

diene

Question 7

the molecule with the higher _________ energy level does the __________

Answer 7

HOMO, attacking

Question 8

does the HOMO or LUMO of butadiene overlap with the HOMO or LUMO of ethylene

Answer 8

HOMO, LUMO

Question 9

is 4+2 thermally or photochemically allowed

Answer 9

thermally

Question 10

is 2+2 thermally or photochemically allowed

Answer 10

photochemically

Question 11

is 4+4 thermally or photochemically allowed

Answer 11

photochemically

Question 12

by increasing conjugation you need _________ energy, that is ___________ wavelengths to do electronic transitions

Answer 12

less, longer

Question 13

as you increase conjugation, the HOMO-LUMO gap _________

Answer 13

shrinks

Question 14

Beer’s law

Answer 14

A (absorbance) = ecl

Question 15

e =

Answer 15

molar absorptivity

Question 16

molar absorptivity

Answer 16

measure of how strongly the sample absorbs light at that wavelength, unique to each conjugated compound

Question 17

c =

Answer 17

sample concentration in M

Question 18

l =

Answer 18

path length of light through cell in centimeters

Question 19

true or false: the color we see is the color being absorbed

Answer 19

false