Chem 2510 prelim #1 Study Guide Exam
and All Actual Answers.
SN1 - Answer The conversion of 2,5-dimethylhexane-2,5-diol into 2,5-dichloro-2,5-
dimethylhexane is a ___ mechanism
HCl, H2O - Answer What are the reagents of the SN1 reaction?
Product of the E1 pathway, water - Answer What are possible sources of contamination of the
SN1 reaction?
Impure product has a larger melting point range - Answer Compare the melting point range of
a pure product in the SN1 reaction and an impure one
Pure crystals have a higher melting point - Answer Compare the melting point of
contaminated crystals to pure crystals in the SN1 reaction
IR, percent yield, melting point - Answer Using what techniques was the product assessed for
purity in the SN1 reaction?
The product is impure and was not fully converted from the 2,5-dimethylhexane-2,5-diol into
2,5-dichloro-2,5-dimethylhexane - Answer What would it suggest if the IR spectrum of the
gathered product of the SN1 reaction has a hydroxyl peak at 3300cm^-1
2,5-dimethyl-2,5-diol - Answer Starting material of SN1 reaction
2,5-dichloro-2,5-dimethylhexane - Answer Desired product of SN1 reaction
Vacuum filtration - Answer To separate the product of the SN1 reaction after HCl was added to
0.25g of 2,5-dimethylhexane-2,5-diol ____ was used
To allow the product to dry even further and prevent contamination - Answer Why was it
important to use low vacuum suction to allow the crystals obtained from initial vacuum
filtration in the SN1 reaction?
1:1 - Answer What is the molar ratio of product to reactant in the SN1 reaction?
Hirsch funnel - Answer The SN1 product was filtered using a ___
, Scintillating vial - Answer The product was collected after filtration in a ___
Glass waste - Answer Used capillary tubes would be thrown in the ___
Capillary tubes - Answer ___ were used to collect samples of product for melting point in SN1
Higher- 1 mol of product is more in g than starting material - Answer Would the theoretical
yield of product in the SN1 reaction be higher or lower than the initial amount of starting
material?
Melting of an impure solid into an impure liquid has a larger change in entropy which
corresponds to a lower melting point temperature - Answer What is the melting point
depression concept?
The separation and identification of a mixture of organic compounds - Answer What is the
purpose of thin layer chromatography?
The silica in TLC plate - Answer The stationary phase of TLC is ___
The fluid that flows through the stationary phase - Answer The mobile phase of TLC is ___
Differences in polarity of compounds contained in solvent lead them to travel varying distances
on mobile phase - Answer What leads to the separation of compounds using TLC?
Visualizing separation of compounds in a mixture - Answer What is the purpose of using
different dips under UV light for the TLC experiment?
Ferrocene, Acetyl Ferrocene, bromocresol green - Answer Which three compounds are
separated in the TLC experiment?
Decreases, decreases - Answer As polarity increases, distance traveled ___ and Rf value ___
for compounds separated in the TLC experiment
Bromocresol green, Acetyl Ferrocene, Ferrocene - Answer List the compounds separated by
TLC in order of decreasing polarity
and All Actual Answers.
SN1 - Answer The conversion of 2,5-dimethylhexane-2,5-diol into 2,5-dichloro-2,5-
dimethylhexane is a ___ mechanism
HCl, H2O - Answer What are the reagents of the SN1 reaction?
Product of the E1 pathway, water - Answer What are possible sources of contamination of the
SN1 reaction?
Impure product has a larger melting point range - Answer Compare the melting point range of
a pure product in the SN1 reaction and an impure one
Pure crystals have a higher melting point - Answer Compare the melting point of
contaminated crystals to pure crystals in the SN1 reaction
IR, percent yield, melting point - Answer Using what techniques was the product assessed for
purity in the SN1 reaction?
The product is impure and was not fully converted from the 2,5-dimethylhexane-2,5-diol into
2,5-dichloro-2,5-dimethylhexane - Answer What would it suggest if the IR spectrum of the
gathered product of the SN1 reaction has a hydroxyl peak at 3300cm^-1
2,5-dimethyl-2,5-diol - Answer Starting material of SN1 reaction
2,5-dichloro-2,5-dimethylhexane - Answer Desired product of SN1 reaction
Vacuum filtration - Answer To separate the product of the SN1 reaction after HCl was added to
0.25g of 2,5-dimethylhexane-2,5-diol ____ was used
To allow the product to dry even further and prevent contamination - Answer Why was it
important to use low vacuum suction to allow the crystals obtained from initial vacuum
filtration in the SN1 reaction?
1:1 - Answer What is the molar ratio of product to reactant in the SN1 reaction?
Hirsch funnel - Answer The SN1 product was filtered using a ___
, Scintillating vial - Answer The product was collected after filtration in a ___
Glass waste - Answer Used capillary tubes would be thrown in the ___
Capillary tubes - Answer ___ were used to collect samples of product for melting point in SN1
Higher- 1 mol of product is more in g than starting material - Answer Would the theoretical
yield of product in the SN1 reaction be higher or lower than the initial amount of starting
material?
Melting of an impure solid into an impure liquid has a larger change in entropy which
corresponds to a lower melting point temperature - Answer What is the melting point
depression concept?
The separation and identification of a mixture of organic compounds - Answer What is the
purpose of thin layer chromatography?
The silica in TLC plate - Answer The stationary phase of TLC is ___
The fluid that flows through the stationary phase - Answer The mobile phase of TLC is ___
Differences in polarity of compounds contained in solvent lead them to travel varying distances
on mobile phase - Answer What leads to the separation of compounds using TLC?
Visualizing separation of compounds in a mixture - Answer What is the purpose of using
different dips under UV light for the TLC experiment?
Ferrocene, Acetyl Ferrocene, bromocresol green - Answer Which three compounds are
separated in the TLC experiment?
Decreases, decreases - Answer As polarity increases, distance traveled ___ and Rf value ___
for compounds separated in the TLC experiment
Bromocresol green, Acetyl Ferrocene, Ferrocene - Answer List the compounds separated by
TLC in order of decreasing polarity
