Reduction of Cyclohexanone to Cylcohexanol

Chemistry and homework help forum.

Organic Chemistry, Analytical Chemistry, Biochemistry, Physical Chemistry, Computational Chemistry, Theoretical Chemistry, High School Chemistry, Colledge Chemistry and University Chemistry Forum.

Share your chemistry ideas, discuss chemical problems, ask for help with scientific chemistry questions, inspire others by your chemistry vision!

Please feel free to start a scientific chemistry discussion here!

Discuss chemistry homework problems with experts!

Ask for help with chemical questions and help others with your chemistry knowledge!

Moderators: expert, ChenBeier, Xen

Post Reply
darkaran
Newbie
Newbie
Posts: 3
Joined: Mon Nov 08, 2021 4:24 am

Reduction of Cyclohexanone to Cylcohexanol

Post by darkaran »

Hello everyone, kinda need help understanding on this topic.
How do I calculate the percentage yield and theoretical yield of the product (cyclohexanol) ?
The weight of the product is = 1.502g
Volume of cylcohexanone is = 2mL
Using NaBH4 and methanol
User avatar
ChenBeier
Distinguished Member
Distinguished Member
Posts: 983
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

Re: Reduction of Cyclohexanone to Cylcohexanol

Post by ChenBeier »

First develop the chemical reaction.
Then you can see how many mole of the keton correspond to the
Then convert the 2 ml into mole and calculate how much theoretically product can be obtained. Then also convert the obtained mass and compare.
darkaran
Newbie
Newbie
Posts: 3
Joined: Mon Nov 08, 2021 4:24 am

Re: Reduction of Cyclohexanone to Cylcohexanol

Post by darkaran »

ChenBeier wrote: Mon Nov 08, 2021 9:51 am First develop the chemical reaction.
Then you can see how many mole of the keton correspond to the
Then convert the 2 ml into mole and calculate how much theoretically product can be obtained. Then also convert the obtained mass and compare.
Okay thank you :)
So does the equation be something like this?
C6H10O + 2 NaBH4 = C6H11OH + 2 BH3 + 2 Na
User avatar
ChenBeier
Distinguished Member
Distinguished Member
Posts: 983
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

Re: Reduction of Cyclohexanone to Cylcohexanol

Post by ChenBeier »

No,

Ok the keton get to alcohol is correct, but there will be nor sodium neither Borane obtained.

Product is sodiumborate.

But you know now that 1 mol keton gives 1 mol alcohol.

Now procedure the next step.
darkaran
Newbie
Newbie
Posts: 3
Joined: Mon Nov 08, 2021 4:24 am

Re: Reduction of Cyclohexanone to Cylcohexanol

Post by darkaran »

ChenBeier wrote: Tue Nov 09, 2021 12:38 am No,

Ok the keton get to alcohol is correct, but there will be nor sodium neither Borane obtained.

Product is sodiumborate.

But you know now that 1 mol keton gives 1 mol alcohol.

Now procedure the next step.
Ohh i see its sodiumborate, thank you. But how do i convert 2ml to mole?
User avatar
ChenBeier
Distinguished Member
Distinguished Member
Posts: 983
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

Re: Reduction of Cyclohexanone to Cylcohexanol

Post by ChenBeier »

First you need specific gravity δ = m/V, convert this to mass, then convert with molar mass to mole.
n =m/M
Post Reply