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Organic Chemistry > Stereochemistry > Flashcards

Stereochemistry Flashcards

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1
Q

Objects are chiral if they are ______ than their mirror images

A

different

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2
Q

Reflect hand in the mirror, can it be superimposed? No, what does this mean?

A

Our hands are chiral

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3
Q

Reflect bottle in the mirror, can it be superimposed? Yes, what does this mean?

A

Bottles are achiral

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4
Q

Objects that can be superimposed on their mirror image are ______

A

achiral

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5
Q

Objects that cannot be superimposed on their mirror image are ______

A

chiral

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6
Q

T/F Chirality = handedness

A

true

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7
Q

What are some lists of common examples that are chiral?

A

-feet
-gloves
-baseball glove
-shoes
-scissors
-golf clubs
(things that are right or left handed)

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8
Q

What are some lists of common examples that are achiral?

A
  • ball
  • glass
  • chair
  • brick
  • fork
  • spoon
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9
Q

a _______ _______ is a tetrahedral atom bonded to four different groups

A

stereogenic center

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10
Q

a molecule with 1 stereogenic center will be ______

A

chiral

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11
Q

a molecule with _____ _____ 1 stereogenic center may be chiral

A

more than

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12
Q

T/F a stereogenic center is a tetrahedral atom bonded to four atoms

A

False, the tetrahedral atom is bonded to 4 different GROUPS

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13
Q

When a molecule has a plane of symmetry it will be ______

A

achiral

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14
Q

A compound is meso if:

A
  • it has multiple stereogenic centers, but it is the same as its mirror image
  • it has more than one stereogenic center, but it is achiral
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15
Q

Every chiral center has two possibilities, what are they?

A

R or S

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16
Q

List the rules for R/S nomenclature

A
  1. Identify the stereogenic center
  2. Rank substituents around stereogenic center 1-4
    - Higher atomic number ranks higher (for isotopes, higher mass ranks higher)
    - When there is a tie, move to the next atom
    - Treat a multiply bonded atom as having an equivalent number of singly bonded atoms
  3. Position lowest priority substituent away
  4. Draw circle from 1 –> 2 –> 3 –> 1
  5. Circle is clockwise = R
    Circle is counter clockwise =S
17
Q

Circle is clockwise =

A

R

18
Q

Circle is counter clockwise =

A

S

Organic Chemistry (5 decks)

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