Re: Total organic synthesis suggestion
Updated: 2011-12-31 10:24:41
What's the time frame for the experiments, what level undergraduate and can you leave experiments overnight?
Re: Help identifying unknown by-product of Pictet-Spengler reaction.
Updated: 2011-12-31 10:14:37.jpg)
Ah. How silly of me. Apologies, and here they are:I've also tried calculating with sodium and with a charge of 2+... I've been focusing on the 441 peak, because it's so close to my product, but I'm quite curious about the base peak at 921. Analogues of this compound have been known to dimerize in the MS, though.I have a feeling it's something to do with the ethoxy leaving groups part way through the Pictet-Spengler. But not entirely certain. Seems the NMR is on the lab computer, so I won't be able to get it for a couple of days.
Re: Help identifying unknown by-product of Pictet-Spengler reaction.
Updated: 2011-12-31 09:46:47As you have the ChemDraw, can you paste in the MW of the compounds you've drawn, just so we don't have to calculate them all to compare to the MS?Re: ORGANIC CHEMISTRY'S PROBLEM
Updated: 2011-12-31 09:39:46Show your attempt: Forum Rules.Did you look up sodium borohydride in the index of your textbook? What does it do?Also, attach images to your post instead of .pdf, more people will see it. For the benefit of others, the structure is attached below.Re: ORGANIC CHEMISTRY'S PROBLEM
Updated: 2011-12-31 09:39:03Do you have any ideas on what might happen? Do you know the properties of sodium borohydride and the reactions with aldehydes and ketones? You will need to find out if you are going to make it to IChO 2013After the Blockade
Updated: 2011-12-28 23:37:11So here is a short timeline of events that will unfold after the Iranians block the Strait of Hormuz. Beginning 48 hours after the blockade starts, at around 3:00 AM, RF jamming will begin and a US Navy man-of-war somewhere over the horizon will launch a barrage of cruise missiles at Iranian surface ships in the Straits. From [...]Highlights from the International Year of Chemistry
Updated: 2011-12-28 13:39:09
As the International Year of Chemistry comes to an end, it’s worth looking back on some of the amazing contests and events that took place. Many of them have left behind lasting resources that will be useful for decades to come. The Future We Create A group of 30 of the brightest minds in chemistry [...]Re-thinking start-up opportunities
Updated: 2011-12-26 05:40:22It is interesting how ones perception of opportunities in the world depend on your context. I have academic colleagues who are in nanotechnology, for instance. When I have spoken of the apparent dearth of entrepreneurialism in chemistry, the sincere feedback I get is that there are nanotech-related startups out there. You know, I don’t doubt this. [...]Euphemisms and similes to avoid in 2012
Updated: 2011-12-22 17:03:29I propose a 20 year ban on the following overused and often mangled euphemisms and similes- Rocket scientist- “it doesn’t take rocket scientist to …”. This one is really tiresome. I propose that it be banned indefinitely and that repeat offenders be tatooed with some humiliating symbol on their noses. Holy Grail- “… It’s like the [...]IYC2011: My 3 Things List
Updated: 2011-12-22 16:37:40
The goals of IYC2011 are to increase the public appreciation of chemistry in meeting world needs, to encourage interest in chemistry among young people, and to generate enthusiasm for the creative future of chemistry. This quote from the chemistry2011.org About IYC page gives us chemists a charge: Embrace the concept that 'Science is for Everyone' [...]Season's Greetings from Chemistry Central
Updated: 2011-12-22 14:11:23To the South Pole!
Updated: 2011-12-21 04:48:22Best of luck to Dale who leaves McMurdo Station tomorrow for the Amundson-Scott Station. Second year in a row that a friend is off to the south pole. He is delivering a detector array for a radio telescope.Online Database Catalogues More than 18,000 Chemical Compounds, Calculates Properties
Updated: 2011-12-20 22:25:51From the wire: A new online toolkit developed at MIT and the Lawrence Berkeley National Laboratory allows researchers to find materials with specific properties by exploring an ever-growing database of more than 18,000 chemical compounds. The site’s tools can quickly predict how two compounds will react with one another, what that composite’s molecular structure will be [...]This week on Chemistry World
Updated: 2011-12-19 13:59:3918 December 2011: Have something to say about an article you’ve read on Chemistry World this week? Leave your comments below… Artificial hips glide on graphite Artificial hips lubricate themselves by grinding up proteins, but are graphite fragments something we want in our bodies? Pharma braces for patent cliff impact Lipitor patent expires while familiar problems persist All clear for [...]Chemistry Central at the MASC-11 meeting
Updated: 2011-12-16 14:54:12Categories All General Chemistry Marketing OA in the Developing World Conferences Presentations Open Access Editorial Board About We want to hear from you Mail us at editorial chemistrycentral.com Search Links Our blogs BioMed Central Blog Chemistry Central Blog Open Repository Blog Open Access Central BioMed Central Chemistry Central Other links F1000 Biology F1000 Medicine ChEBI Chem DB ChemRefer ChemSpider Chemists Without Borders Experimental Data Checker IUPAC Links for Chemists Process Analytical Technology PubChem WebElements eMolecules Archive December 2011 Mon Tue Wed Thu Fri Sat Sun 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Today Chemistry Central Blog Friday Dec 16, 2011 Chemistry Central at the MASC-11 meeting Chemistry Central JournalMercury Processing at the New Idria Smelter
Updated: 2011-12-15 15:50:49
A few Andreas Feninger photos found at the Library of Congress are shown below. The New Idria mine was a productive mine and smelting operation in central California. Note the fellow at the tilted sorting table, physically agitating the mercury from the solid soot and allowing it to run down the table for collection. This is a gravity [...]Mythbusters Cannonball Flight Path
Updated: 2011-12-14 00:44:12
Via: PerceptionBuilder.com I couldn’t resist posting this map. Just how many myths are there involving cannons? Judging from Mythbusters, there must be quite a few because they are always blasting something. There is a job I’d love to have.Process development with calorimetry
Updated: 2011-12-12 04:59:57I’ve turned my attention to reaction calorimetry recently. A reaction calorimeter (i.e., Mettler-Toledo RC1) is an apparatus so constructed as to allow the reaction of chemical substances with the benefit of measuring the heat flux evolved. Reaction masses may absorb heat energy from the surroundings (endothermic) or may evolve heat energy into the surroundings (exothermic). Calorimetry [...]Power Generation with Mercury Turbine
Updated: 2011-12-12 03:09:30A 1931 article in the periodical Popular Science describes a power generation system that used a mercury boiler to drive a 10,000 kW turbine in conjunction with a secondary steam loop tapping power from the condenser side of the mercury loop. This secondary steam loop was used to drive a separate turbine. The South Meadow generating [...]Jean-Claude Bradley appointed co-Editor-in-Chief at Chemistry Central Journal
Updated: 2011-12-07 17:13:11Categories All General Chemistry Marketing OA in the Developing World Conferences Presentations Open Access Editorial Board About We want to hear from you Mail us at editorial chemistrycentral.com Search Links Our blogs BioMed Central Blog Chemistry Central Blog Open Repository Blog Open Access Central BioMed Central Chemistry Central Other links F1000 Biology F1000 Medicine ChEBI Chem DB ChemRefer ChemSpider Chemists Without Borders Experimental Data Checker IUPAC Links for Chemists Process Analytical Technology PubChem WebElements eMolecules Archive December 2011 Mon Tue Wed Thu Fri Sat Sun 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Today Chemistry Central Blog Wednesday Dec 07, 2011 Jean-Claude Bradley appointed co-Editor-in-Chief at ChemistryCheap Laugh Tuesdays #15: Emeril Chemistry
Updated: 2011-12-06 17:00:07
Welcome back to CLT! Click here for more CLT humor via Andrew Toos Enjoy!Exploding vesicles
Updated: 2011-12-05 15:04:07
Categories All General Chemistry Marketing OA in the Developing World Conferences Presentations Open Access Editorial Board About We want to hear from you Mail us at editorial chemistrycentral.com Search Links Our blogs BioMed Central Blog Chemistry Central Blog Open Repository Blog Open Access Central BioMed Central Chemistry Central Other links F1000 Biology F1000 Medicine ChEBI Chem DB ChemRefer ChemSpider Chemists Without Borders Experimental Data Checker IUPAC Links for Chemists Process Analytical Technology PubChem WebElements eMolecules Archive December 2011 Mon Tue Wed Thu Fri Sat Sun 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Today Chemistry Central Blog Monday Dec 05, 2011 Exploding vesicles A dramatic phenomenon in which light triggersConquistador’s preamble
Updated: 2011-12-05 05:58:53The extraction of silver and mercury in Spanish new world was central to the expansion and upkeep of the empire. Silver provided wealth enabling the crown to project power and pay its debts. In the early years of the conquest the Spanish pilfered and exhausted Inca gold and silver available in stores and caches. Eventually, the [...]The Chinese dig in.
Updated: 2011-12-05 00:48:52Here is a choice tidbit from the Washington Post. The Chinese, it seems, have been constructing a tunnels which some believe are meant to contain (possibly) strategic nuclear weapons and large numbers of people. What China is actually up to and what it means for the control of nuclear proliferation is unclear. Generally, when a country [...]