Final Exam Flashcards
In the nucleophilic substitution at saturated carbon experiment, you prepared a 100mL of 50% 2-propanol and 50% water as a solvent. Then you reacted 2-bromo-2-methylpropane and 2-bromopropane in the presence of a NaOH hydroxide solution. Which alkyl halide reacted first and why?
2-bromo-2methylpropane because the reaction goes through SN1 mechanism
Why was H2SO4 utilized during the dehydration of alcohol?
H2SO4 was utilized during the reaction to facilitate the formation of water which is the leaving group
Dehydration of 2-methylcyclohexane is a
elimination reaction
In the dehydration of cyclohexanol experiment, you added at the end anhydrous CaCL2 what was the purpose of it?
to remove any water (dry the product)
A test for the presence of C=C where the purple color of the KMnO4 decolorized and brown precipitate of MnO2 is formed. This reaction is called…
solubility
What will happen when bromine is added to ethene?
reddish brown color of bromine dicolorised
Which reagent was used in Baeyers test?
KMnO4
What is formed from CH3-CH=CH2 + Br2 –>
CH3CHBrCH2Br
Potassium permanganate in alkaline solution can be used to oxidise ___ to 1,2-diols
alkenes
Baeyers oxidation reaction is an example of ?
syn addition
Bromine addition to unsaturated hydrocarbon follows?
anti-addition
Which tests show can be used to show that a phenol is present?
iron (iii) chloride test
A positive chromic acid test gives what shade of color?
green
which of the following would NOT react in the chromic acid test?
tertiary alcohols
Conversion of an aldehyde to an alcohol is generally known as…
oxidation
Which pairing of alcohol and class is incorrect?
pentan-3-ol ; tertiary alcohol
Treatment of pentan-1-ol with Jones reagent is expected to give which one of the following products?
pentanal
An organic compound reacts with FeCL3 and a purple color I observed after the reaction. What kind of functional group is expected in the organic compound used?
phenol
Phenols are good acid due to
resonance stabilized phenoxide ion
Which of the following statements regarding the E1 mechanism is wrong?
reaction by the E1 mechanism usually occur in one step
Which of the following statements regarding the SN2 mechanism is wrong?
SN2 reaction usually occur in two steps
Which of the following statements regarding the SN1 mechanism is wrong?
the SN1 mechanism involves a single step
Which is the most reactive compound by the SN2 mechanism
CH3CH2CH2CH2Br
Which of the following statements is wrong?
the rate constant of an SN2 reaction does not depend on the nucleophile
