Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Ochem > chapter 7 > Flashcards

chapter 7 Flashcards

1
Q

what are olefins?

A

another name for alkenes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what does a carbon-carbon double bond consist of

A

stable sigma bond and less stable pi bond

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

unsaturated

A

capable of adding hydrogen in presence of catalyst

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

saturated

A

cannot react with anymore hydrogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

alkane formula

A

CnH2n+2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

alkene or ring formula

A

CnH2n

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

formula for degrees of unsaturation

A

2C + 2 + N - X - H / 2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

compound with 2 double bonds =

A

diene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

compound with 3 double bonds =

A

triene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

compound with 4 double bonds =

A

tetraene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

vinyl group

A

–CH=CH2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

allyl group

A

–CH2–CH=CH2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

organic compound produced in the largest volume

A

ethylene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

do boiling points of alkenes increase or decrease with increasing molecular weight

A

increase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

does increased branching of alkenes lead to a higher or lower boiling point

A

lower

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Zaitsev’s rule

A

alkenes with more highly substituted double bonds are usually more stable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Zaitsev’s product

A

more substituted alkene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

rings that are _____-membered rings or larger can easily accommodate double bonds

A

five

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

once a cycloalkane contains at least ____ or more carbon atoms, it can accommodate a trans double bond

A

8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Bredt’s rule

A

a bridge bicyclic compound can’t have a double bond at a bridgehead position unless one of the rings contains at least 8 carbons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

conjugated double bonds

A

double bonds that can interact with each other because they are separated by just one single bond

22
Q

what is the extra stability of the conjugated double bond created by

A

resonance energy

23
Q

what does E1 stand for

A

elimination, unimolecular

24
Q

the rate limiting transition state of E1 mechanism involves a _______ molecule

A

single

25
Q

rate equation of E1

A

rate = k[RX]

26
Q

is E1 first or second order

A

first

27
Q

what substrate is usually used for E1

A

tertiary alkyl halide
- can be secondary, but needs stronger conditions and reacts much more slowly

28
Q

does E1 or E2 form a carbocation

A

E1

29
Q

how many steps in E1

A

2

30
Q

is the first step of E1 exothermic or endothermic

A

endothermic

31
Q

is the second step of E1 exothermic or endothermic

A

exothermic

32
Q

is E1 overall exothermic or endothermic

A

exothermic

33
Q

does E1 want to use a primary halide

A

no - needs AgNO3

34
Q

rate equation of E2 reactions

A

rate = k[RX][B-]

35
Q

what does E2 stand for

A

elimination, bimolecular

36
Q

how many steps in E2

A

one

37
Q

is trans or cis more stable as a product

A

trans

38
Q

order of reactivity for E2

A

3>2>1

39
Q

bulky bases used for E2

A
  1. tBuOK (Na, Li)
  2. (iPr)2NH
  3. NEt3
40
Q

do bulky bases favor SN2 or elimination reactions

A

elimination

41
Q

what type of product do bulky bases produce

A

Hofmann

42
Q

for an E2 reaction, a _______ arrangement of the orbitals is needed

A

coplanar

43
Q

reactions that produce more products than reactants generally increase the _______ of the system

A

entropy

44
Q

a decrease in temperature favors

A

elimination

45
Q

polar aprotic solvents

A
  • DMSO
  • DMF
  • CH3CN
  • acetone
46
Q

do polar protic solvents favor elimination or substitution

A

elimination

47
Q

reaction with primary alkyl halide

A
  • strong: SN2
  • weak: no reaction
48
Q

reaction with secondary alkyl halide

A
  • strong: SN2, E2
  • weak: SN1, E1
49
Q

reaction with tertiary alkyl halide

A
  • strong: E2
  • weak: SN1, E1
50
Q

catalytic cracking

A

least expensive way of making alkenes

Ochem (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions