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Organic Chem 1- Chapter 4

front 1

cycloalkanes / alicyclic compounds are what?

back 1

Saturated cyclic hydrocarbons

front 2

What's the formula for alkenes?

back 2

CnH2n+2

front 3

Cycloalkanes have what traits?

back 3

Non polar

Non hydrogen bonding

Fairly Inert

Low in flexibility

front 4

Cycloalkanes with more carbon chains have what?

back 4

Rotational freedom

front 5

Stereoisomer

back 5

Atoms connected in the same order but differing in a three-dimensional orientation.

front 6

Stereochemistry

back 6

The three-dimensional aspects of structure and reactivity.

front 7

Cis (Z)

back 7

Function group on the same side of the plane

front 8

Trans (E)

back 8

Function group both on opposite sides of the plane

front 9

Angle strain

back 9

Strain due to the compression and expansion of the bond angle.

front 10

What are the 4 different bond angles

back 10

Propane- 60 degree

Butane- 90 degree

Pentane- 108

Hexane- 120

front 11

Which is more stained cyclohexane or cyclopropane

back 11

Cyclopropane

front 12

What's torsional strain?

back 12

Strain due to the eclipsing bonds between neighboring atoms

front 13

What's steric strain?

back 13

Strain due to repulsive interaction when atoms get to close to eachother.

front 14

Whose bonds can bend?

back 14

Cyclopropane

front 15

How is maximum bonding achieved in a unstrained alkene?

back 15

When two atoms have their overlapping orbitals pointing towards each other

front 16

What does cyclobutane have?

back 16

Cyclobutane has less angle strain than cyclopropane but has more torsional strain because of its larger number of ring hydrogens.

front 17

Cyclopentane has what?

back 17

Large torsional strain

front 18

What is a chair conformation?

back 18

A three dimensional shape of a hexane, with no strains

front 19

Twist boat conformation has what?

back 19

Both torsional and steric strain, higher in energy than the chair conformation- less stable

front 20

Substituent positions for the chair conformation are?

back 20

Axial- Parallel to the ring axis

Equatorial- are in the rough plane of the ring, around the ring equator.

front 21

What is the ring flip?

back 21

chair conformations interconvert and exchange axial and equatorial positions.

front 22

What is 1,3-diaxial interactions?

back 22

The energy difference between axial and equatorial conformations is due to steric strain

front 23

What's more stable? Gauche or anti Butane

back 23

Anti Butane

front 24

What is a polycyclic molecule?

back 24

when two or more cycloalkane rings are fused together along a common bond