Leroy

but how should i picture the hydrolysis of the phenacetin into the p-phenetidine salt. How does the acetyl group get cleaved off. Should i imagine that a +(C=O)CH3 gets cleaved because i don't understand how that would happen.

I'm doing an experiment where i make acetaminophen from p-aminophenol. I then make phenacetin from acetaminophen and in the final stage i synthesise dulcin. The problem i have is i can't figure out the reaction mechanism of the last step and i've looked all over. See the picture for the reaction. Can anyone explain to me how the NH2 group is built in and replaces the CH3 group. Thanx

right... that's kinda hard since that's really my only reference... but i understand that it was moved as i thought it would before i posted it

i guess this would be the place to post it... fafalone, why was my post deleted titled Hemaroids?

right... i should have thought about it like that as wel... dumbass me

yeah, i know that which was in the link, but are super critical fluids a different form of matter?

probably should have put this in quantum and theoretical chemistry.. sorry

I was wondering why two substances can either react with one other when one is in the LUMO state and the other in the HOMO state. Why can't a LUMO react with another LUMO if there are no hinderances or a HOMO/HOMO reaction?

On the main page there was this link: http://scienceforums.net/forums/showthread.php?s=&threadid=2747 Noting that a new form of matter was found stating that solid, gas, liquid, plasma and Bose-Einstein condensate were previously known. Question 1: Since i study chemistry, i was wondering where super critical fluids fall under? Question 2: And if they are a different type why aren't they mentioned? Question 3: If super critical fluids aren't a different form of matter, what differentiates the condensates with the three forms (gas, solid, liquid) which everyone is familiar with?

lol....

but would taking another salt say NaOH (as an example) and make it reversable is would all endothermic reactions like AN reacts be irreversable. Instead of heating it like your do with the sodium acetate heat packs can't you just freeze the crystallized salts to get it back the way it was.

it does clear up a lot of things, thanx and i have one more question since you've said that crystallization is an exothermic process, could you say that it wouldn't be possible to make a cold pack that which can be reused like the sodium acetate pack. Because the ammonium nitrate pack is irreversable as far as i know

so let me see if i got this right if the disolving enthalpy is + then it requires heat to dissolve and when it crystallizes the heat is released. And with some substances its the other way round and that's why ammonium nitrate needs heat to crystallize. But what i want to know as well is why don't they use sodium chloride or any other more accesable salts, even though sodium acetate isn't hard to come by. And one other thing, how do they get that strip of metal in the supersaturated solution when it is something the crystals can 'grow' on.

i don't see the post where you explain in thermodynamically so either i'm blind or maybe i didn't make it clear enough in my previous post.

i'm busy with my own project making my own heat pack and cold pack but since i study chemistry i'd also like to know why sodium acetate releases heat and ammonium nitrate absorbs it. Has it got to do with crystallisation enthalpy or something else. Could anyone explain exactly what happens or redirect me to a webpage which explains it in detail. I'd also like to test if it can be done with other saturated salt solutions maybe something like NaCl or other salts that are readily available. thnx

if you search with google for quadruple bonds you will get a list of sites explaining how metals can for quadruple bonds and why carbon can't normally etc. http://www.wikipedia.org/wiki/Covalent_bond http://stanley.chem.lsu.edu/webpub/4571-Notes/chap10-MM-bonding.doc those are but several of the search results.

I was wondering how this molecule is built up. It is a molecule of carbon and silicon. I was just ondering whether it would be like a salt and have a crystalline structure or whether it can be seen as a C-Si molecule bonded by a quadruple bond??

i know this is actually polymer chemistry, but there is no seperate forum for that and i thought that organic was the closest related to it. What i was wondering is how you can determine average molar mass of a polymer through simple titration. I have heard of cloud point but can anyone tell me what i would need to do exactly to determine the average molar mass through this method??