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Organic Chemistry Final
Semester 1
110
Chemistry
Undergraduate 2
12/18/2013

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Cards

Term
Alkyne has a BLANK bond
Definition
Triple
Term
Alkene has a BLANK bond
Definition
Double
Term
Alkyne + H2 & metal (Pt or Pd)
Definition
Triple bond becomes single bond
Term
Alkyne + H2 + Lindlar's catalyst
Definition
Triple bond becomes cis double bond
Term
Alkyne + H2 + Ni2B
Definition
Triple bond becomes cis double bond
Term
Alkyne + Na2 & NH3 (l)
Definition
Triple bond becomes trans double bond
Term
A more stable base corresponds with a BLANK acid
Definition
Strong
Term
A more stable base means that the base is BLANK (strong or weak)
Definition
Weak
Term
A BLANK (strong or weak) base will deprotonate a terminal alkyne
Definition
Strong
Term
A BLANK (strong or weak) base will not deprotonate a terminal alkyne
Definition
Weak
Term
Alkyne + H2SO4, H2O, & HgSO4
Definition
Triple bond becomes a single bond and double bonded oxygen on the more substituted position
Term
Alkyne + excess (xs) HX
Definition
Triple bond becomes a single bond with two Xs bonded to the more substituted position
Term
Alkyne + HX
Definition
Triple bond becomes a double bond with X bonded to the more substituted hindered side
Term
Alkyne + xs X2 & CCl4
Definition
Triple bond becomes a single bond with 2 X's bonded at each end (total of 4)
Term
Alkyne + RX (Ex: MeI)
Definition
R is added to to open side of triple bond
Term
Alkyne + 9-BBN, H2O2 & NaOH
Definition
Triple bond becomes a single bond and a double bonded O at the less substituted position
Term
Alkyne + Disiamylborane, H2O2, and NaOH
Definition
Triple bond becomes a single bond and a double bonded oxygen on the less substituted side
Term
Alkyne + O3 & H2O
Definition
Oxidative cleavage: Triple bond becomes a double bonded oxygen and a single bonded OH x2 for each new molecule
Term
Terminal alkyne + O3 &H2O
Definition
Oxidative cleavage: Triple bond becomes a double bonded oxygen and a single bonded OH, and CO2
Term
Enol
Definition
Molecule with a C=C double bond alyllically located to an alcohol; very stable
Term
Ketone
Definition
Oxygen double bonded to a carbon with an R on each side (resonance-stabilized enol)
Term
Aldehyde
Definition
An oxygen double bonded to a carbon with an H on one side and an R on the other
Term
Alkyne + X2 & CCl4
Definition
Triple bond becomes a double bond with an X bonded to each side (trans)
Term
Internal alkyne + NaNH2, NH3 (l) and H2O
Definition
Terminal alkyne
Term
Vinylic position
Definition
One of the carbons in a C=C double bond
Term
Allylic position
Definition
Attached to one of the carbons in a C=C double bond
Term
Hydrogen abstraction
Definition
A form of radical inhibition in which hydroquinone donates a hydrogen to destroy a radical and resonance stabilizes itself and then destroys another radical by donating a hydrogen again
Term
Hydrogen abstraction
Definition
A form of radical inhibition in which hydroquinone donates a hydrogen to destroy a radical and resonance stabilizes itself and then destroys another radical by donating a hydrogen again
Term
delta H must be (+ or -) for the halogenation of an alkane
Definition
-
Term
Delta G must be (+ or -) for a reaction to occur
Definition
-
Term
Which is a slower process, bromination or chlorination? And why?
Definition
Bromination due to a higher activation energy
Term
When an alkane is chorinated, the Cl is attached at the BLANK position
Definition
60% the more substituted position, 40% the less substituted position
Term
When an alkane is brominated, the Br is attached at the BLANK position
Definition
More substituted position
Term
How to determine acid/base strength
Definition
ARIO
Term
Pattern of base stability in the periodic table
Definition
Increasing to the right, increasing as you go down
Term
Induction effects on base strength
Definition
Weaker/stabler when negative atoms provide inductive effects
Term
A negative charge on a triple bond is more or less stable than on a single bond?
Definition
More stable
Term
Which is a weaker base, methyl oxide or ethyl oxide? And why?
Definition
Methyl oxide because methyl donates less electrons to the oxygen than ethyl
Term
Z designates the top priority atoms to be on the (same or opposite) side(s) of a double bond
Definition
Same
Term
E designates the top priority atoms to be on the (same or opposite) side(s) of a double bond
Definition
Opposite
Term
Cis double bonds are more or less stable than trans?
Definition
Less
Term
Alkene stability can be determined by
Definition
The number of substiuents on the double bond
Term
Mechanism for primary carbocation treated with a nucleophile
Definition
SN2
Term
Mechanism for secondary carbocation treated with a nucleophile
Definition
SN2 & SN1
Term
Mechanism for tertiary carbocation treated with a nucleophile
Definition
SN1
Term
Mechanism for a primary carbocation treated with a strong base
Definition
E2
Term
Mechanism for a secondary carbocation treated with a strong base
Definition
E2
Term
Mechanism for a tertiary carbocation treated with a strong base
Definition
E2
Term
Mechanism for a primary carbocation treated with a strong nucleophile/strong base
Definition
SN2 (and minor E2)
Term
Mechanism for a secondary carbocation treated with a strong nucleophile/strong base
Definition
E2 (and minor SN2)
Term
Mechanism for a tertiary carbocation treated with a strong nucleophile/strong base
Definition
E2
Term
Mechanism for a primary carbocation treated with a weak nucleophile/weak base
Definition
N/A
Term
Mechanism for a secondary carbocation treated with a weak nucleophile/weak base
Definition
N/A
Term
Mechanism for a tertiary carbocation treated with a weak nucleophile/weak base
Definition
SN1 and E1 (high temperature favors E1)
Term
Reagents that are nucleophile only (7)
Definition
Cl-,Br-,I-, HS-,H2S, RS-,RSH
Term
Cl-,Br-,I-, HS-,H2S, RS-,RSH
Definition
Reagents that are nucleophile only
Term
Reagents that are base only (3)
Definition
H-,DBN, DBU
Term
H-,DBN, DBU
Definition
Reagents that are base only
Term
Reagents that are strong nucleophiles/strong bases (4)
Definition
OH-, MeO-, EtO-, T-BuOK
Term
OH-, MeO-, EtO-, T-BuOK
Definition
Reagents that are strong nucleophiles/strong bases
Term
Reagents that act as weak nucleophiles/weak bases (3)
Definition
H2O, MeOH, and EtOH
Term
H2O, MeOH, and EtOH
Definition
Reagents that act as weak nucleophiles/weak bases
Term
Configuration of SN2
Definition
Inversion (back-side attack)
Term
Rate of SN2
Definition
=k[substrate][nucleophile]
Term
Which is concerted, SN2 or SN1?
Definition
SN2
Term
Carbocation reactivity of SN2
Definition
Primary > Tertiary
Term
Configuration of SN1
Definition
Racemic mixture of inversion and retention
Term
Reactivity of SN1
Definition
Tertiary > Primary
Term
(z)
Definition
High priority groups on the same side of a double bond
Term
(e)
Definition
High priority groups on opposite sides of a double bond
Term
Is cis more or less stable than trans
Definition
More stable
Term
Reactivity of E2
Definition
Tertiary > Primary
Term
E2 mechanism: Double bond in more or less substituted position?
Definition
With reagents that are not sterically hindered (OH, MeO, and EtO) the double bond is placed in the more substituted position. With t-BuOK, the double bond is placed in the less substituted position.
Term
Reactivity of E1
Definition
Tertiary > Primary
Term
E1 mechanism: Double bond in more or less substituted position?
Definition
Major product is always the more substituted position
Term
Alkene + HX
Definition
Double bond becomes single bond with X bonded to the more substituted position
Term
Alkene + HX & ROOR
Definition
Double bond becomes single bond with X bonded to the less substituted position
Term
Markovinikov position
Definition
X placed in more substituted position
Term
Anti-Markovnikov position
Definition
X placed in less substituted position
Term
Zaitsev product
Definition
Double bond formed in more substituted position
Term
Hofmann product
Definition
Double bond formed in less substituted position
Term
Configuration/stereochemistry of HX addition to an alkene
Definition
Racemic mixture of R and S
Term
Alkene + H3O+
Definition
Double bond becomes a single bond and an OH is bonded to the more substituted side
Term
Stereochemistry (configuration) of acid-catalyzed hydration
Definition
Racemic mixture of R & S
Term
Difference between acid-catalyzed hydration and oxymercation-demurcation?
Definition
Acid catalyzed hydration can undergo carbocation rearrangements, while oxymercation-demurcation cannot
Term
Alkene + Hg(OAc)2, H2O, & NaBH4
Definition
Double bond becomes a single bond and an OH is bonded to the more substituted position (with no rearrangement!)
Term
Alkene + BH3*THF & H2O2, NaOH
Definition
Double bond becomes a single bond with an OH bonded to the less substituted position (with no carbocation rearrangement!)
Term
Syn addition
Definition
Two atoms are added to the same side of a molecule (dashed and dashed, or wedge and wedge)
Term
Anti addition
Definition
Two atoms are added to opposite sides of a molecule (dashed and wedge)
Term
Is hydroboration-oxidation (BH3, THF, H2O2, NaOH) syn or anti?
Definition
Syn
Term
Alkene + H2 & Pt
Definition
Double bond becomes a single bond
Term
Is catalytic hydrogenation syn or anti?
Definition
Syn
Term
Alkene + H2 & Wilkinson's catalyst
Definition
Double bond becomes a single bond with syn addition of H's
Term
Alkene + H2 & BINAP
Definition
Double bond becomes a single bond with anti addition of H's
Term
Alkene + X2
Definition
Double bond becomes a single bond with an anti addition of an X on each side
Term
Does halogenation (X2) occur via syn or anti addition?
Definition
Anti
Term
Alkene + X2 & H2O
Definition
Double bond becomes a single bond and an OH is placed at the more substituted position and an X is placed at the other side (anti-addition)
Term
Does halohydrin formation occur via syn or anti addition?
Definition
Anti
Term
Alkene + MCPBA & H3O+
Definition
Double bond becomes a single bond with an anti addition of OH on each side
Term
Alkene + OsO4, NaHSO3 & H2O
Definition
Double bond becomes a single bond with a syn addition of OH on each side
Term
Alkene + KnO4, NaOH & cold
Definition
Double bond becomes a single bond with a syn addition of OH on each side
Term
Alkene + O3 & DMS
Definition
Double bond is cleaved into two C=O double bonds
Term
Use of TsCl & Py?
Definition
Reagents used before an EN1 reaction if the leaving group is an OH
Term
How to convert an alkene to an alkyne
Definition
1) Br2, CCl4 2) xs NaNH2, H2O
Term
Lowest energy conformation of cyclohexane
Definition
Chair
Term
Highest energy conformation of cyclohexane
Definition
Half-chair
Term
Second highest energy conformation of cyclohexane
Definition
Boat
Term
Second lowest energy conformation of cyclohexane
Definition
Twist-boat
Term
Which substituent is more stable: axial or equatorial?
Definition
Equatorial
Term
Gauche interaction
Definition
A form of steric hinderance present in a staggered conformation
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