Question

1. below are four organic compounds. the reagent shown is added to the compound. what should you visually see when the two materials are mixed together? write the structure of the product; if no reaction, write nr.

a. ch₃ - ch = ch₂+ br₂→
b. hexagon + kmno₄(aq)→
c. ch₃ - ch = ch - ch₃+ h₂so₄(conc.)→
d. benzene - like structure + kmno₄(aq)→

Explanation:

Step1: Analyze reaction a

Alkenes react with bromine in an addition - reaction. The red - brown color of bromine disappears as it reacts with the alkene. The product is 1,2 - dibromopropane, $CH_3CHBrCH_2Br$.

Step2: Analyze reaction b

Cyclohexene is an unsaturated compound. It reacts with aqueous $KMnO_4$ (a strong oxidizing agent). The purple color of $KMnO_4$ fades. The product is a diol, cyclohexane - 1,2 - diol.

Step3: Analyze reaction c

But - 2 - ene reacts with concentrated $H_2SO_4$ in an addition reaction. The product is 2 - butyl hydrogen sulfate, $CH_3CH(OSO_3H)CH_2CH_3$.

Step4: Analyze reaction d

Benzene is a stable aromatic compound. It does not react with aqueous $KMnO_4$. So the answer is NR.

Answer:

a. Product: $CH_3CHBrCH_2Br$, Observation: Red - brown color of $Br_2$ disappears
b. Product: Cyclohexane - 1,2 - diol, Observation: Purple color of $KMnO_4$ fades
c. Product: $CH_3CH(OSO_3H)CH_2CH_3$, Observation: Reaction occurs
d. Product: NR, Observation: No reaction (purple color of $KMnO_4$ remains)