confirmations of higher alkane

Question 1

In general, the all-anti conformer

Answer 1

is most stable

Question 2

conformers with zig-zag appearances are called

Answer 2

zig-zags

Question 3

The most stable cycloalkanes should have bond angles
near

Answer 3

109.5º

Question 4

cyclopentane(108 degrees) vs cyclohexane(120 degrees), which is more stable?

Answer 4

cyclohexane

Question 5

cyclopropane has a bond angle of

Answer 5

60

Question 6

cyclobutane has a bond angle of

Answer 6

90

Question 7

cyclopentane has a bond angle of

Answer 7

108

Question 8

cyclohexane has a bond angloe of

Answer 8

120

Question 9

cycloheptane has a bond angle of

Answer 9

70 degrees

Question 10

how do we measure stability

Answer 10

stability using enthalpies of combustion

Question 11

Heat per CH2
combusted is smallest for

Answer 11

cyclohexane

Question 12

cyclopropane is characterized by extremely severe

Answer 12

angle strain—its internal C–C–C bond angle is only 60º

Question 13

C–C bonds in cyclopropane are ______ and derived from the bond angled overlap of ______hybrids

Answer 13

-bent
-sp3

Question 14

Internal C–C bonds are ____and_____ to break

Answer 14

weak
liable

Question 15

Cyclopropane also suffers from _____due to ____

Answer 15

torsional strain
-eclipsing C-H’s

Question 16

which angle strain is worse cyclobutane or cyclopropane

Answer 16

Angle strain in cyclobutane is not quite as bad as cyclopropane (90º versus 60º)

Question 17

How does the cyclobutane ring minimize torsional or eclipsing strain?

Answer 17

It puckers