Organic Chemistry Flashcards

1
Q

August Kekule

A

cyclic structure of benzene

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2
Q

Robert Robinson

A

movement of electrons to show that is the driving force for chem rxn

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3
Q

constituted the concept of resonance in order to explain the structures of molecules or ions that are not accounted for by the octet rule

A

Linus Pauling

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4
Q

“localization” of electrons are
-shared between 2 atoms through covalent bond
-unshared e- belong to a single atom

what kind of structure is this?

A

Lewis Structure

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5
Q

“delocalization” of electrons
- e- are shared by several nuclei
- e- are distributed to achieve stable arrangement

ex. Ozone(O3)

What is this called?

A

Resonance

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6
Q

Determine whether each of the following statements pertaining to constitutional isomers is TRUE or FALSE.
[a.] They have the same molecular formula
[b.] They have the same molecular weight
[c.] They have the same connectivity to their atoms
[d.] They have the same physical properties

A: T, F, F, F
B: T, T, F, F
C: F, T, T, T
D: T, F, T, F

A

B: T, T, F, F

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7
Q

different compounds that share the same formula

A

Isomers

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8
Q

Isomers that differ in connectivity only is called _____________. While isomers that differs in orientation in space is called ___________. (ex. trans/cis)

_________ are mirror images but not superimposable (pag pinagpatong diff)
_________ are not mirror images

A

Constitutional - diff connectivity
Stereo - diff in orientation in space

Enantiomers - mirror image not superimposable
Diastereomers - not mirror images at all

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9
Q

Hydrocarbons
1. Aliphatic: “alephar” - Greek: fat
2. Aromatic

What are the 3 kinds of Aliphatic hydrocarbons?

A
  1. Alkanes - sat’d hydrocarbons
  2. Alkenes - double bond
  3. Alkynes - 3
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10
Q

Explain the difference in structure between a saturated hydrocarbon from an unsaturated hydrocarbon.

A: Any of these
B:A saturated hydrocarbon only contains carbon-carbon single bonds while anunsaturated hydrocarbon contains one or more carbon-carbon double or triple bonds
C: A saturated hydrocarbon is used mainl in cheaper forms of gasolines for vehicle use while unsaturated hydrocarbons compose most of the gasoline formulae used by current gasoline manufacturers
D: A saturated hydrocarbon can no longer accept any hydrocarbon or inorganic element, and compound while an unsaturated hydrocarbon is more flexible in reaction mechanisms

A

B

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11
Q

Which among the following can be the possible structures of a molecule that has the molecular formula C5H8?

A: Alkane and Alkene with a single double bond
B: Alkene with a single double bond and Alkyne with a single triple bond
C: Cycloalkane and an Alkene with two double bonds
D: Cycloalkene with a single double bond and two rings

A

D

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12
Q

Cn H_2n+2

A

Alkane

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13
Q

Cn H_2n

A

Alkene

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14
Q

Cn H_2n-2

A

Alkyne

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15
Q

Theorems:
1. For every double bond, the alkane loses 2H atoms
2. For every triple bond, the alkanes loses 4H atoms
3. For every ring formed, the alkane loses 2H atoms

A
  1. Alkene
  2. Alkyne
  3. Cycloalkane
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16
Q

Cn H2n - 2

A

Alkene with 2 double bonds

17
Q

CnH2n-2

A

-Cycloalkene with 1 double bond
-Two rings
-Alkene

18
Q

Who among the following proposed the idea correlating Molecular Geometry and Valence Electron Pairs that would later become the Valence Shell Electron Pair Repulsion (VSEPR) Theory?
A: Nevil Sidgwick
B: Ronald Nyholm
C: Herbert Powell
D: Ryutaro Tsuchida

A

B: Ronald Nyholm

19
Q

What is the electron-group geometry
of CO2, H2S,and XeF4?

A: Linear, Tetrahedral, Octahedral
B: Tetrahedral, Octahedral, Trigonal bipyramidal
C: Linear, Trigonal Planar, Octahedral
D: Octahedral, Trigonal bipyramidal, Tetrahedral

A