Topic : Review : Classification of Polymers

Classification of PolymersThermoplastic PolymersThese are linear, one-dimensional polymers which have strong intramolecular covalent bonds and weak intermolecular van Der Waals bonds. At elevated temperature, it is easy to "melt" these bonds and have molecular chains readily slide past one another. These polymers are capable of flow at elevated temperatures, can be remolded into different forms, and in general, are dissolvable. A thermoplastic, under the application of appropriate heat, can be melted into a "liquid" state. Thermosetting PolymersThese are three-dimensional amorphous polymers which are highly crosslinked (strong, covalent inte

Topic : A few pts. on org reactions - PlZZZZZZZZZ have a look

1. Acetoacetic-Ester CondensationClaisen CondensationThe Claisen Condensation between esters containing ?-hydrogens, promoted by a base such as sodium ethoxide, affords ?-ketoesters. The driving force is the formation of the stabilized anion of the ?-keto ester. If two different esters are used, an essentially statistical mixture of all four products is generally obtained, and the preparation does not have high synthetic utility.However, if one of the ester partners has enolizable ?-hydrogens and the other does not (e.g., aromatic esters or carbonates), the mixed reaction (or crossed Claisen) can be synthetically useful. If ketones or nitriles are used as the donor

Topic : Aroma...!! ticity..! no 2

Identify the aromatic compounds from the following..........try this..!!! and rate me if u find it useful..!!

Topic : THE acid

hough we consider H2SO4 / PERCHLORIC acid to be the strongest , THE STRONGEST ACID IS FLOUROANTIMONIC ACIDThe white sphere is the proton which is outside the SbF6- sphere. This makes the proton effectively naked and accounts for the extreme acidity.This acid is 10^19 times stronger than Sulphuric acid.according to a paper, this acid can produce solutions with a pH upto -25! 

Topic : acidic strength..!

Tell me the answers and do rate me if u like it...!!!! Problem A B C D Which is thestrongest acid Which is theweakest acid 1 ABCD ABCD   2 ABCD ABCD   3 ABCD ABCD  

Topic : Aroma...!! ticity..! test take it..!

Choose the aromatic compounds from the following::

Topic : How to Study Organic Chemistry

Organic Chemistry is a challenging subject. It uses its own language and employs many very precise concepts yet without referring mathematical tools or aspects. Within first few hours of study you will be able to use the basic concepts to understand a lot about the molecular world around you.The first difficulty a student encounters is the amount of study material available about organic molecules and their reactions any standard text book is not less then 1400 pages long, a student cannot expect to learn all this material without investing a considerable time and effort in studying it and if he does so he disproportionates his time allocations with other subjects e

Topic : cannizzaro reaction

CannizzaroDisproportionation of aromatic aldehydes into aromatic acids and aromatic alcohols.     The speed of the reaction depends on the substituents in the aromatic ring.     Crossing reaction (reaction of Rodionov and Fedorova) - using two different aldehydes (aromatic and aliphatic). Usually, fomaldehyde and alcohol are produced.     Intramolecular rearrangment reaction (also known as Cannizzaro's rearrangment) - transformation of alpha-ketoaldehydes into alpha-oxyacids.  

Topic : Some important compounds

Important compounds and their formulae.   Alum -  (NH4)2SO4.Al2(SO4)3.24H2O Aqua fortis ? HNO3 Aquaregia ?Conc.HNO3 + conc. HCl (1:3) Asbestos ? CaMg3 (SiO3) 4 Baking soda or powder ? NaHCO3 Black lead - graphite Blue vitriol ? CuSO4.5H2O Baryta water ? Ba(OH) 2 SOLUTION Bremstone ? S8 Baryta - BaO Bleaching powder ? CaOCl2 Boranes ? Hydride of boron Calomel ? Hg2Cl2 Carbolic acid ? C6H5OH Carborundum - SiC Caro?s acid ? H2SO5 Caustic potash  - KOH Chromyl chloride ? CrO2Cl2 Corundum ? Al2O3 Coinage metals ? Cu, Ag and  Au Corrosive subli

Topic : 13C-NMR

Carbon Nuclear Magnetic Resonance (13C-NMR) SpectroscopyNuclear Magnetic Resonance (NMR) Spectroscopy is not limited to the study of protons. Any element with a nuclear spin (13C, 17O, 19F, 31P and many others) will give rise to an NMR signal.Carbon-13 has a nuclear spin (I = ½) and makes up 1.1% of all naturally occurring carbon, a high enough abundance along with modern technology to make carbon nuclear magnetic resonance spectroscopy (13C-NMR) a useful technique. Since carbon is the element central to organic chemistry, 13C-NMR plays an important role in determining the structure of unknown organic molecules and the study of organic reactions and processes

Topic : Arndt - Eistert rxn complete mechanism

MechanismIn the first step, the diazomethane carbon adds to the acid halide, to give an ?-diazoketone. In the second step, treatment with water or silver salt initiates a rearrangement with the R-group migrating to produce an isocyanate, which readily hydrolyses to give a carboxylic acid. If alcohols or amines are used instead of water, esters and amides are obtained, respectively.This rearrangement is known as Wolff rearrangement.

Topic : interconversion of fung gps organic

 click to open itvery usefull  plz rate

Topic : Arndt-Eistert rxn

Arndt-EistertSynthesis of higher homologues of carboxylic acids by interaction of diazomethane and acyl chlorides.       Newman-Beal modification - with triethylamine (which binds the HCl) and silver benzencarboxylate. Wilds modification - with higher alcohols; catalysts are not necessary.

Topic : test- The Study of Chemical Reactions

1 .       Which equation correctly expresses the Gibbs free energy of a reaction as a function of the equilibrium constant Keq for the reaction?   G = ?RTln(K)   G = ?RTln(K)   G = ?RTlog(K)   G = +RTln(K)

Topic : Most wanted

Here are various lists...List of Organic reactions>>>LIst of organic compounds >>>List of inorganic compounds >>>List of biomolecules >>>List of minerals >>>List of alchemical substances >>>List of alloys >>>List of compounds >>>List of drugs >>>List of elements >>>List of proteins >>>Protective groups >>>List of named reagents with info >>>List of named reactions with info >>>Source : Wikipedia.org, Organic-Chemistry.com--------------------------------.:: Prashanth Sekhar ::.*******************(¨`?.?´¨) Always`?.¸

Topic : KNOWLEDGE FOR YOU

Vitamins, their sources & Diseases caused due To their deficiencies Vitamins, Their Sources And Diseases Caused Due To Their Deficiencies Name of the vitamin Main source Disease caused due to their deficiencies Vitamin A

Topic : 3-D, animations

Topic : hmmmm.......these will b useful :)

silver carbonate and oxy salts of silver on heating strongly gives silver metal, same is the case with mercury also.1)      Carbonates of alkali metals except Li2CO3 are stable towards heat.2)    Sulphites of lead, barium and strontium are insoluble in water, Calcium sulphite is partially soluble in water, most of the other sulphites are soluble in water.3)    In reactions that involve nascent oxygen, we don?t use HCl because it is highly susceptible to oxidation nd gives out Cl2 gas.4)    I2 soln is almost insoluble in water, there fore, the I2 soln used is iodine in alcohol.5)   

Topic : ooooooooo....da reaction road map !! :)

The Reaction Roadmap