http://talkchem.com Just about anything on chemistry Tue, 26 Jan 2010 18:26:06 +0000 http://backend.userland.com/rss092 en Hey! Finally was able to isolate the dimethly ether of gallacetophenone. Here is what the TLC looked like Apparently the reactant (right in the tlc) has converted almost completely to the product. The reaction conditions were as follows : 3.36 gm of gallacetophenone(0.02 moles) and 15.8 gm (0.1 mole) was added in ... http://talkchem.com/synthetic-chemistry/successful-dimethylation-and-isolation-of-gallacetophenone-dimethyl-ether.html Hi Friends, I am getting quite busy with my schedule, which is the reason I am not getting time to write my experiments. I will try to write them as soon as possible. Don't worry I have them jotted down in my notes, but just not on ... http://talkchem.com/uncategorized/too-busy-to-write.html Found a convinient methylation process. Going to try out that agaisnt the one with methly iodide... Here is the process... Gallacetophenone 3,4-dimethyl ether To a boiling mixture of gallacetophenone (16.8g, 1 mol), benzene (400 mL) and anhydrous K2CO3 (55g) was added methyl sulphate (26.5g, 2.05 mol) in one portion, and the whole ... http://talkchem.com/uncategorized/convinient-methylation-process.html Today was a good day! I learned a lot from the research reactions that I have been carrying out. Its really a great learning exprience. Okay, today what I did was methylation of my product that I have synthesized earlier. I have described the product synthesis here. Let me call ... http://talkchem.com/synthetic-chemistry/methylation-reaction-a-small-test.html Here pyrogallol reacts with Acetic Anhydride in presence of Zinc Chloride (Lewis Acid) and acetic acid as a solvent. Pyrogallol: IUPAC Name: benzene-1,2,3-triol Chemical Formula: C6H6O3 Exact Mass: 126.03 Molecular Weight: 126.11 m/z: 126.03 (100.0%), 127.04 (6.7%) Elemental Analysis: C, 57.14; H, 4.80; O, 38.06 Boiling Point: 309°C Melting Point: 131-134 °C Critical Temp: 792.92 [K] Critical Pres: 99.8 [Bar] Critical Vol: ... http://talkchem.com/synthetic-chemistry/gallacetophenone-synthesis-synthesis-of-gallacetophenone.html What I am going to do from now on, is probably write down every thing I research.  I will try to be as regular as I can be in the course of my writing. Let me begin with writing about the reaction that I carried out the other day. See ... http://talkchem.com/uncategorized/research-introduction.html We wish to develop a notation that will permit us to state a generalized selection rule summarizing the conclusions of the pericyclic theory. Local Symmetry and Interaction Topology We have taken care to emphasize in the discussion that the important symmetry is the local symmetry of the part of the molecule actually ... http://talkchem.com/theory/woodward-hoffmann-pericyclic-selection-rules.html There are several transformations that are conceptually related to carbene reactions but do not involve carbene, or even varbenoid intermediates. Usually these are reactions in which the generation of a carbene is circumcented by a concerted rearrangement process. An important example of this type of reaction is the thermal and ... http://talkchem.com/name-reactions/wolff-rearrangement.html The hydrogen atomic orbitals would not do us a great deal of good if orbitals of other atoms were radically different, since in that case different pictures would be required for each atom. But the feature of the hydrogen atom problem that determines the most important characteristics of the hydrogen ... http://talkchem.com/theory/covalent-bond/extension-of-molecular-orbitals-to-other-atoms.html Lewis structures serve admirably for many aspects of mechanistic organic chemistry. Frequently, however, we need a more accurate bonding model. Models Based on the Quantum Theory The description of chemical bonding must ultimately be based on an understanding of the motions of electrons. In order to improve our model, we need to ... http://talkchem.com/theory/covalent-bond/molecular-orbitals.html