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Organic Chemistry > 5-Stereochemistry > Flashcards

5-Stereochemistry Flashcards

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1
Q

Vocab:

Different compounds with the SAME MOLECULAR FORMULA?

A

Isomers

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2
Q

Vocab:

Isomers that differ in the way the atoms are commented to each other?

A

Constitutional isomers

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3
Q

Vocab:

Isomers that differ only in 3-D arrangement

A

Stereoisomers

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4
Q

Constitutional isomers

A
  • different bonds
  • different IUPAC names
  • same or different functional groups
  • different physical properties
  • different chemical properties
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5
Q

Stereoisomers

A
  • identical IUPAC names
  • *must add prefix “cis” or “trans”
  • same functional group
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6
Q

Vocab:

A molecule that is SUPERIMPOSABLE on its mirror image

A

Achiral

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7
Q

Vocab:

A molecule that is NOT superimposable on its mirror image

A

Chiral

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8
Q

Vocab:
Mirror images that are NOT superimposable
(A set of chiral molecules)

A

Enantiomers

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9
Q

Vocab:

A tetrahedral carbon bonded to 4 different groups

A

Stereogenic center

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10
Q

Chiral?

Molecules with NO stereogenic center

A

NOT chiral

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11
Q

Chiral?

Molecule with ONE stereogenic center

A

ALWAYS chiral

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12
Q

Chiral?

Molecule with TWO stereogenic centers

A

MAYBE chiral

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13
Q

Chiral or achiral?

Non superimposable

A

Chiral

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14
Q

Chiral or achiral?

Presence of a plane of symmetry

A

Achiral

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15
Q

Clockwise or counterclockwise?

R isomer

A

Clockwise

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16
Q

Clockwise or counterclockwise?

S isomer

A

Counterclockwise

17
Q

Vocab:

Stereoisomers that ARE mirror images

A

Enantiomers

18
Q

Vocab:

Stereoisomers that are NOT mirror images

A

Diastereomers

19
Q

Vocab: ACHIRAL with tetrahedral stereogenic centers, generally having a plane of symmetry

A

Meso compound

20
Q

Identical? Enantiomers? Diastereomers?

Compounds with the SAME R,S designation at EVERY tetrahedral stereogenic center

A

Identical

21
Q

Identical? Enantiomers? Diastereomers?

Compounds with OPPOSITE R,S designation

A

Enantiomers

22
Q

Identical? Enantiomers? Diastereomers?
Compounds with the SAME R,S designation for ONE tetrahedral stereogenic center and the OPPOSITE R,S designation for at least one of the other tetrahedral stereogenic centers

A

Diastereomers

23
Q

Identical? Enantiomers? Diastereomers?

CIS and TRANS isomers

A

Diastereomers

24
Q

Vocab: plane-polarized light

CLOCKWISE rotation

A

DEXTROROTARY

“d” or “+”

25
Q

Vocab: plane-polarized light

COUNTERCLOCKWISE rotation

A

LEVOROTARY

“R” or “-“

26
Q

Vocab:

Mixture with an EQUAL amount of two enantiomers

A

Racemes mixture

27
Q 
Equation: 
Enantiomeric excess (ee)
A

% of one enantiomer - % of the other enantiomer

28
Q

Distaereomers have the (same or different) physical properties?

A

Different

29
Q

Diastereomers have the (same or different) optics, rotations

A

Different

30
Q

Disstereomers can/cannot be separated by common physical techniques?

A

Can

31
Q

Constitutional isomers can/cannot be separated by common physical techniques?

A

Can

32
Q

Enantiomer a have (same of different) physical properties?

A

Same

33
Q

Enantiomers can/cannot be separated by common physical techniques?

A

Cannot

34
Q

Enantiomers have (the same/different) physical properties

A

Same

35
Q

Enantiomers react (the same/different) with CHIRALreagents?

A

Different

Organic Chemistry (6 decks)

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