Organic Chemistry

Hey, I was wondering if anyone here knows were to get organic powdered dye for use in colored smoke bombs, I have searched a while now but cannot find a place that sells dye for smoke bombs, the only dye I find is that for clothing which won't work for smoke bombs. Your help is appreciated.

I would like to produce some tetralin for use as a solvent in a reaction I'm planning to do. I have pure napthalene, and the Wiki page on tetralin (http://en.wikipedia.org/wiki/Tetralin) states that it is produced by the catalytic hydrogenation of napthalene. I ordered a platinum wire recently that can act as catalyst, but I don't want to hydrogenate the napthalene past tetralin and all the way to decalin. How do I prevent this from happening? Procedure: 1)Melt naptha in a 2-necked, glass jointed flask, with the Pt wire already in the flask. An adapter is attached to one neck with a rubber hose leading to a cathode in an epsom salt solution. 2) Begin bubbling hydrogen…

Hi All, I want to prepare water having PH value of 3.8 using 5% of H2SO4. does any one has idea on how to prepare Thanks David Botham

I'm asking if its possible? Could through genetic engineering and biochemistry, could we develop a bio-synthetic "plant" that would harvest energy from sunlight rather than turning it into an electrical current?

This may or may not have been better placed in the references thread, but seeing as I'm talking mostly about organic chemistry references, I thought I might place it here. Just a collection of useful and cool websites I have encountered: Organic Chemistry Portal http://www.organic-chemistry.org/ This site is brilliant. Kind of like organowiki, except a bit messier and has various search methods. You can, for instance, search up reactions based on functional groups. It provides examples from the literature for each reaction as well, with links to the original papers. Organowiki http://organicreacti...the_OrganoWiki! Organowiki is a very new site that I wa…

does anyone has the experience of handling isonitrile, will this kind of compound stable under column chromatography and roatary evaporation conditions?

Okay, I want to make biogas. I've got a ton of organic stuff (yard waste and dog crap) that would be fun to do something useful with. Does anybody out there have a cheap, simple way of making it for someone with no ability to fabricate custom parts? I don't think i have any way to compress the gas for storage, but I've heard you can easily convert it to methanol. I just want to make a practical apparatus for home production.

Hello! I need a cyclization reaction which goes in acidic environment. But that substance should not react in a basic environment. Thanks in advance.

Hello fellow scientists, A few days ago, I ran a reaction of an alkynyl tosylate (specifically ROTs, the R group being an internal alkyne) with p-toluenesulfonamide (TsNH2) in base (K2CO3) in hopes of alkylating the sulfonamide, and getting RNHTs out as the product. This reaction took much longer than I imagined, and I finally decided to work it up after 3 days of it running. When I took a TLC test of the crude, there was some starting material, the product spot, and p-toluenesulfonamide. From past experience (I ran this reaction before, except using 1-bromo-2-butyne), I had to use a 1:1 Hexane:EtOAc mixture to chromatograph this mixture, leaving me with ~50% yield o…

Di-ethyl Ether Gas Scrubbing This might have been covered but I have had little luck in searching for an effective Diethyl Ether gas scrubber. I am about to perform a Di-Ether purification from Heptane using fractional distilling in a Vigreux column (20cm) on a 1.5L scale (6x250mL per my glassware). My problem is that even though this is being performed in a decent fume hood, I have always had significant ether gas drop down out of the hood. This is a homemade hood mind you, however, if possible, I would like to run the sealed apparatus through several gas washing bottles to eliminate ether to air exposure. My first bottle is 700mL with around 200~g of drieri…

Hi, I need some help regarding my understanding of organic synthesis. I was reading over some class notes, and found a diagram which showed a molecule and stated that it could be used as a precursor for a synthesis reaction. It said, that the synthesis of it could lead to multiple products due to stereoisomersim, optical isomerism or multiple reactive sites giving unintended products. I have attached the image of the molecule below and would be very appreciative of any help with this!! Cheers, Az.

In another thread (this one), Essay mentioned pyrolysis. I am not a big fan of pyrolysis, so I wanted to discuss it. But it seems to be off-topic, so I continue the discussion here, in a separate thread. I disagree. The bio-crude contains way too much oxygen (about 50% on a weight basis) to be compatible with standard petrochemistry. Refining the bio-crude is a separation nightmare, because the crude is still reactive and contains a lot of different components. Standard distillation is a bad idea, because the crude will react upon heating. Removing the oxygen is energetically a bad idea, and economically impossible. The large majority of bio-waste is ligno…

physics-chemistry quiz Waxy substance ,resonating to ultra vailot radiation , Made from ethylene and benzaladhyead together under high Pressure ?

What concepts should one have completely locked down before attempting orgo?

After doing some reasearch, I have been wondering if making this ester at home would be okay, but I would like a second opinion (or more ) before I try it. I am thinking (if it is safe) to try ispropyl alcohol and acetic acid, to make isopropyl acetate and water: C3H7OH + HC2H3O2 = H2O + C5H10O2. Thanks,

Medicinal chemists are currently in a risky position and their future seems doughtful. This is the opinion of the majority of experts from what i have noticed. For example an article from ACS http://pubs.acs.org/doi/full/10.1021/ml200297a. Synthetic organic chemistry is gradually losing it's necessity and more biologics enter the pharma industry. It seems as if companies are no longer looking for more and better drugs but cheaper ones . Drugs that deal with Alzheimer and CNS agents are ignored because of their high costs. Can it be inferred from all this, that the time of medicinal chemists as the elite of pharmaceuticals is over? Anyhow, more and more people are unempl…

what the averrage time for acception?

Hi I need help understanding the proper steps it takes to get balance oxidation equation for the following C5H12O + NaOCl + CH3COOH ----> C5H10O + CH3CO-Na+ + HCl + H20 I understand the basic mechanics of separating the organic part of the equation but how do I do the inorganic part? For example I understand that at the beginning I take out the spectator atom Na from NaOCl then I have 2H+ OCl ---> H2O(to balance the oxygens) + Cl- and 2H+ + C5H12O = C5H10 But how is the HCl formed? Where does the hydrogen come from for the HCl? Do you reintegrate the acetic acid at the end? Are there any free electrons that need to be cancelled out…

Hi, is acetanilide soluble in cold ethanol (~20ºC) ? I found it's about 18g/100ml, but is not a reliable source. I'm asking because maybe I did somenthing stupid...

not sure if I have this right or if in the before last step in this synthesis that NaOH is able to remove the halogen? just looking for some guidance. thx

so why are some compounds slightly soluble in water?

I have a quick question regarding glucose. If glucose (in pyranose form) is reacted with PBr3 would it be possible to get only the primary alcohol to brominate? My thinking is that since it's much less hindered bromine will add much more quickly to the primary alcohol. Or would it be better to protect all of the alcohol groups, then selectively deprotect the primary alcohol? I'm asking because I need glucose with a bromine where the primary alcohol is located for a step in a synthesis project and am not very familiar with carbohydrate reactions. This is a small part of the overall project that I was unsure about. Also this is for an O-Chem II class just for reference. …

My question is; If using the same two aldehyde's (CH3CH2CHO) for both alpha substitution and condensation reactions I always get the same end product, basically a Beta-hydroxy aldehyde. Is the only difference in these reactions simply the base used to deprotonate? I get that you need a full equivalent of something fairly strong such as Na+OEt- for the alpha and a catalytic amount of something fairly week such as -OH for the condensation. Is that all it is, or is there some fundamental flaw in my reaction mechanism?

Hello all. I'm a new prof and going to be teaching organic chem for the first time in the spring. At my university, the organic chemistry is only offered for one semester. I have two questions that I would welcome opions on. 1. Do you think students would benefit more from a survey style course where many topics are considered briefly, or to cover the material typically found in the first semester of the traditional two semester series? 2. Does anyone have any texts to reccomend for a one semester course? I've read amazing things about David Klein's "Organic Chemistry as a second language" (text book and study guides), but i wonder if the text would be too i…

Hello. I have read that FR-4 substrate is made of fiberglass and epoxy resin and would like to learn on how to dissolve this material ? I have these two chips that appear to be packaged by the same material (FR-4) which I would like to have removed (decapsulate) leaving the die/circuitry intact. Any ideas would be appreciated Thanks Victor