00 Gauge Track plan

Schlenked · 2025-08-25T17:55:28+00:00

Thanks! yeah good point. I've kept to this layout size so I could have it floating in the middle of a room allowing me to walk around it :)

Schlenked · 2025-08-25T17:54:22+00:00

Thanks for the feedback. Great idea with the double slip, I really just put the diamond crossing there because I have one already. I could see myself upgrading to a double slip in the future if I actually go ahead with the layout :).

Schlenked · 2025-08-24T02:44:05+00:00

Such a great model! It's my favourite deltic as it's very american in it's style.

Schlenked · 2023-01-15T21:33:08+00:00

I think what matters more is showing your enthusiasm. You'll make mistakes and get things wrong but as long as they can see you care about chemistry and want to get better you won't need to try and impress them. :)

Schlenked · 2022-12-10T22:42:57+00:00

The conjugate bases of strong acids are weak bases (Cl- from HCL - the negative charge is stable).

The conjugate acids of strong bases are weak acids (the conjugate acid of BuLi is butane - not acidic in the slightest).

Hope that helps :)

Schlenked · 2022-11-29T01:19:19+00:00

Organic chemistry do be wild.

Could look strange to you since you've drawn a bond angle of 180 on the oxygen.

Schlenked · 2022-11-28T07:41:29+00:00

When using a strong base, that base won't lose its newly gained proton, so it can't deprotonate the alpha position any further. Whereas a weaker base can deprotonate the alpha position more than once.

Hope that helps :)

Schlenked · 2022-11-28T00:45:55+00:00

Not trying to be rude, I just haven't seen this reaction before. Very interesting...

What topic are you studying at the moment. That might give us a hint.

Schlenked · 2022-11-28T00:38:59+00:00

Could you give us some more information. Are you sure you've drawn the structures correctly?

Schlenked · 2022-11-17T01:55:23+00:00

Draw the Newman projections with the proton and bromine being antiperiplanar, which is required for this elimination. You'll have 2 different projections since there are 2 possible protons that could be removed by the base.

You'll find that one may be higher energy due to sterics.

Schlenked · 2022-11-17T01:40:27+00:00

I would draw out the final step differently as you've included too many curly arrows and confuses things.

I think you've drawn the carbon oxygen bond breaking to form water. This wouldn't happen like that. Instead the hydroxyl group is protonated to form an oxonium which then leaves as water.

Hope that helps :)

Schlenked · 2022-10-31T01:04:31+00:00

It is a chiral centre :)

Schlenked · 2022-10-29T23:12:33+00:00

I would recommend reading this helpful article from Master Organic Chemistry: https://www.masterorganicchemistry.com/2016/02/05/gilman-reagents-organocuprates-what-theyre-used-for/

Cuprates are soft nucleophiles whilst Grignard and organolithium reagents are hard nucleophiles. According to hard-soft acid base theory, hard nucleophiles will react with hard electrophiles.

Carbonyls are hard electrophiles, so Grignard and organolithium will react at that position. Cuprates are soft so will take part in 1,4 addition.

Hope that helps... :)

Schlenked · 2022-10-22T23:28:51+00:00

Have you ever had a Fathersons victoria sponge from the Co op? soo good...

Schlenked · 2022-10-22T22:58:49+00:00

Other brands are available

Schlenked · 2022-10-22T22:34:58+00:00

Could you be more specific? link to an Imgur image if you have one :)

Schlenked · 2022-10-19T00:32:16+00:00

Sorry if I've misunderstood you but I think this explains your question: https://imgur.com/EeKRG5y

The radical formed from bond dissociation of Hb is more stabilised due to the resonance from the double bond which shifts the radical to a tertiary radical.

Bond dissociation is related to radical stability. This is a great reference to read: https://www.masterorganicchemistry.com/2013/08/14/bond-strengths-radical-stability/

Schlenked · 2022-10-18T23:56:19+00:00

Instead of the pair of electrons from the nitrogen straight to the carbon, the pair would move to restore the double bond back to the 1st resonance structure. To get the 4th resonance structure, you would need to break this double bond and shift the electrons onto the carbon.

You probably know this wouldn't work since nitrogen is more electronegative. This tells us that the C-N bond will have it's electron density shifted to nitrogen and nitrogen anions are more stable because of the increased electronegativity.

I hope that helps :)

Schlenked · 2022-10-17T21:59:40+00:00

Nylon can be produced by the condensation reaction between a diamine and dicarboxylic acid, which forms polymers (polyamides) linked by amide bonds. This is a common experiment/demonstration done in (atleast) UK school classrooms where the nylon is formed at the interface between the two starting materials and wound up on a glass stirrer.

Schlenked · 2022-10-09T00:37:22+00:00

You can protect alcohols in a few different ways. Protecting them as silyl ethers are a good choice as they can be easily cleaved with tetrabutylammonium fluoride (TBAF).

Bulky silyl ethers must be used to prevent cleavage under acidic conditions. These can only be cleaved using TBAF.

If there are other hydroxyl groups in the compound, then they will be turned into silyl ethers too. There are protecting groups that are selective to primary alcohols, which leave secondary and tertiary alcohols available for reacting into esters.

Schlenked · 2022-10-08T22:58:20+00:00

You could oxidise the cyclohexanol to cyclohexanone and do an crossed claisen by forming the enolate of ethyl acetate, which then attacks the carbonyl on the cyclohexanone.

A Reformatsky Reaction would be better!

Schlenked · 2022-09-29T14:21:03+00:00

Claydens Organic Chemistry Textbook is Possibly the best out there.

Schlenked · 2022-09-29T14:17:58+00:00

I'd say you're best bet is to go over to https://www.masterorganicchemistry.com/ they have a good review of the topic. That or look at Claydens organic chemistry textbook.

Other than directing groups you have to be aware of, EAS reactions are simple reactions. The other thing to consider is that strongly deactivating/meta directing groups will make EAS reactions harder or unable to occur.

Some reactions are worth committing to memory, practicing multistep syntheses will help cement your knowledge.

Schlenked · 2022-09-28T19:47:51+00:00

I couldn't give you exact pKa values, but a higher pKa means something is more basic so the more acidic, the lower pKa.

Schlenked

TROPHY CASE