Stereochemistry Flashcards

Understand and know the key terms and ideas

1
Q

Isomers

A

compounds that have the same molecular formula but are structurally different

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2
Q

Constitutional Isomers

A

molecules that have the same molecular formula but different bonding patterns and atomic connectivity

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3
Q

Stereoisomers

A

isomers that differ in spatial arrangement of atoms, rather than order of atomic connectivity

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4
Q

Enantiomers

A

a pair of molecules that exist in two forms that are mirror images of one another but cannot be superimposed one upon the other

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5
Q

Chiral

A

it cannot be superposed on its mirror image by any combination of rotations, translations, and some conformational changes

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6
Q

Achiral

A

it is superimposable, i.e. it can be superimposed on its mirror image

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7
Q

Stereocenter

A

An atom with four or more different attachments, interchanging of two of these attachments leads to another stereoisomer

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8
Q

(+) Enantiomer

A

A plane rotating in the clockwise direction

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9
Q

(-) Enantiomer

A

A plane rotating in the counter-clockwise direction

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10
Q

Racemic Mixture

A

A plane with no net rotation. It is a 50/50 mixture of (+), and (-) enantiomers.

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11
Q

Racemate

A

A racemic mixture

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12
Q

Levo Rotatory

A

Rotation to the left

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13
Q

Dextro Rotatory

A

Rotation to the right

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14
Q

Enantiopure Sample

A

A sample consisting of 100% of either (+)/(-) enantiomers

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15
Q

Racemic Sample

A

A sample with no rotation that contains 50/50 of both (+),(-) enatniomers

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16
Q

Ascalemic Sample

A

A sample that is optically active, but not an enantiomer

17
Q

If you observe optical activity, the sample is either…

A

An enantiomer or an ascalemic sample

18
Q

If no optial activity is observed, then the sample is either…

A

A racemic sample or achiral