Qvault Ochem - what are these weird reagents???

[Member 8586]

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What are these weird reagents? Im used to the problems in Destroyer and never saw anything like this 😕 helppp please 🙁..they scared the krap out of me when I just saw them....also do reagents on the DAT look like these (this form or whatever) or are they more like Destroyer's?

 

[Mr. Thirsty]

Not sure about the first or last one.... But MeOH is methanol or CH3OH. (weak acid/base)

 

[Member 8586]

Not sure about the first or last one.... But MeOH is methanol or CH3OH. (weak acid/base)

so Me just refers to methyl? have u seen that elsewhere as well? or on the DAT?

 

[MrSummerlin]

What are these weird reagents? Im used to the problems in Destroyer and never saw anything like this 😕 helppp please 🙁..they scared the krap out of me when I just saw them....also do reagents on the DAT look like these (this form or whatever) or are they more like Destroyer's?

It looks like ur doing sn1, 2, e 1, 2.......
KOtbu- Is potassium with an ionic charge to an Oxygen attached to a tertiary Carbon. It is a strong bulky base.
MeOH- methyl and an OH attahed to the methyl. It is a small base. And an extremely strong base as MeO-.

 

[Member 8586]

It looks like ur doing sn1, 2, e 1, 2.......
KOtbu- Is potassium with an ionic charge to an Oxygen attached to a tertiary Carbon. It is a strong bulky base.
MeOH- methyl and an OH attahed to the methyl. It is a small base. And an extremely strong base as MeO-.

it was actually 3 separate problems.. the first one - explanation says its an aldol but i dont know what that reagent is

the Me I figured was methyl but i wasnt sure because i never was it like that, so its the same as CH3OH/CH3O-?

the last one i kinda figured was a big base E2 rxn too but again i never saw the reagent so it thru me off..... have people commonly seen reagents looking like this??

 

[nesrevival]

I saw those on ACS and textbook..
K OtBu = strong base but weak nucleophile

 

[MrSummerlin]

it was actually 3 separate problems.. the first one - explanation says its an aldol but i dont know what that reagent is

the Me I figured was methyl but i wasnt sure because i never was it like that, so its the same as CH3OH/CH3O-?

the last one i kinda figured was a big base E2 rxn too but again i never saw the reagent so it thru me off..... have people commonly seen reagents looking like this??

its three problems but only two reagents.

yes it is the same a ch3oh/ch3o-

the last is the same base as the first one

 

[dymm]

Yes, these reagents are not out of the ordinary and can definitly show up on the DAT.

 

[Mr. Thirsty]

What are these weird reagents? Im used to the problems in Destroyer and never saw anything like this 😕 helppp please 🙁..they scared the krap out of me when I just saw them....also do reagents on the DAT look like these (this form or whatever) or are they more like Destroyer's?

Yes I have seen "Me" stand for Methyl.

Et = Ethyl (EtOH would be ethanol)
Bu = Butyl (BuOH would be butanol)

So to answer your questions fully about the reagents:

1) is k+ and BuO(-) (conj base of butanol) ---> weak base [The "t" could stand for tert.; is that what is confusing you?]
2.) Methanol/conj. base (week acid/weak base)
3.) K+ and BuO(-) ----> weak base

 

[dental13]

What are these weird reagents? Im used to the problems in Destroyer and never saw anything like this 😕 helppp please 🙁..they scared the krap out of me when I just saw them....also do reagents on the DAT look like these (this form or whatever) or are they more like Destroyer's?

Bu = Butyl
Me = Methyl

The first one is two ketones reacting with base; K+ -OC(CH3)3 =KOtBu.
And, if you see aldehyde or ketones with base, you should think of aldol condensation where one of alpha proton is removed and attaches to the carbon carbonly group. Then if you see a HEAT, lose water(H2O), forming double bond between carbon carbonyl group and alpha carbon of attached molecule.

second problem is just epoxide reaction on basic solution, where you would attack less substituted carbon on epoxide.

Third question is just E2 reaction where Br is removed and foring cyclohexene. whenever you see a Br attached to the secondary carbon, and you see a strong base like NaOCH3, NaOH, NaOC2H6.

And the last one KO+Bu, I think this should be K+OBu, a strong base.

Please correct me if I am wrong

 

[Member 8586]

I saw those on ACS and textbook..
K OtBu = strong base but weak nucleophile

is that exactly how its written in those two sources and exactly stating strong base/weak nuc?

its three problems but only two reagents.

yes it is the same a ch3oh/ch3o-

the last is the same base as the first one

so is it a type of something between the first and last because theyre written differently or they can be written both ways?

Yes, these reagents are not out of the ordinary and can definitly show up on the DAT.

Yes I have seen "Me" stand for Methyl.

Et = Ethyl (EtOH would be ethanol)
Bu = Butyl (BuOH would be butanol)

So to answer your questions fully about the reagents:

1) is k+ and BuO(-) (conj base of butanol) ---> weak base [The "t" could stand for tert.; is that what is confusing you?]
2.) Methanol/conj. base (week acid/weak base)
3.) K+ and BuO(-) ----> weak base

i thought it was possibly tert-butyl but wasnt sure because i never was it like that...Et ive def seen but not Me or Bu...thanks def glad im finding this out now instead of on the DAT bc Destroyer didnt have any of the ones pictured! im afraid of what other ones i may encounter in Qvault now :/

Bu = Butyl
Me = Methyl

The first one is two ketones reacting with base; K+ -OC(CH3)3 =KOtBu.
And, if you see aldehyde or ketones with base, you should think of aldol condensation where one of alpha proton is removed and attaches to the carbon carbonly group. Then if you see a HEAT, lose water(H2O), forming double bond between carbon carbonyl group and alpha carbon of attached molecule.

second problem is just epoxide reaction on basic solution, where you would attack less substituted carbon on epoxide.

Third question is just E2 reaction where Br is removed and foring cyclohexene. whenever you see a Br attached to the secondary carbon, and you see a strong base like NaOCH3, NaOH, NaOC2H6.

And the last one KO+Bu, I think this should be K+OBu, a strong base.

Please correct me if I am wrong

ooo idk why but i thought aldols were only in weak base or with OH-/H2O as the reagent....so if i see 2 aldehydes or 2 ketones or a combination of 1 of each plus a strong base - think Aldol...right?


last bit of confusion though...some people are saying the KOtBu is a strong base and some are saying weak base - any consensus? also, are the two KOtBu and KO+Bu pictured the same thing ?

 

[nesrevival]

You definitely need to know these names.
Such as EtO or AcO. OR WE SAY t-Bu as tert butyl
And n-Bu as normal butyl

 

[Member 8586]

You definitely need to know these names.
Such as EtO or AcO. OR WE SAY t-Bu as tert butyl
And n-Bu as normal butyl

EtO and AcO .. are they the same as EtOH and AcOH ? would both be the same thing right? are there any other similar ones i should know?