http://talkchem.com Just about anything on chemistry Fri, 11 Jun 2010 10:42:18 +0000 http://backend.userland.com/rss092 en JSDraw.init(); Tertiary alcohols, R1 R2 R3.COH, may be synthesised by Action of the Grignard reagent upon diethyl carbonate ]]> http://talkchem.com/uncategorized/synthesis-of-t-alcohols.html JSDraw.init(); amino acid as bipolar ion although the amino acid are commonly shows as containing an amino group, H2NCHRCOOH, certain chemical and physical are not consist with structure. a. the amino acid are nonvolatile crystalline solid which melts with decomposition at fairly high temperature . They are insoluble in polar solvent lick petroleum-ether,ether ,Benzine , [...]]]> http://talkchem.com/theory/119.html http://talkchem.com/molecules/characterisation-of-unsaturated-aliphatic-hydrocarbons.html JSDraw.init(); UREA Wohler’s classical synthesis of urea from ammonium cyanate may be carried out by evaporating solutions of sodium cyanate and ammonium sulphate In aqueous solution at 100° the change is reversible and equilibrium is reached when 95 per cent, of the ammonium cyanate has changed into urea. Urea is less soluble in water than is ammonium sulphate, hence [...]]]> http://talkchem.com/uncategorized/urea.html http://talkchem.com/synthetic-chemistry/methylene-iodide.html JSDraw.init(); Pseudo-saccharin ethers. Pseudo-saccharin chloride reacts with alcohols to give ethers (0-alkyl derivatives of saccharin) : Heat a little pseudo-saccharin chloride with excess of the anhydrous alcohol in a test-tube until hydrogen chloride is no longer evolved. Recrystallise from alcohol or other organic solvent. With the lower primary alcohols, heating at 100° for 10 minutes uffices: [...]]]> http://talkchem.com/uncategorized/pseudo-saccharin-ethers.html JSDraw.init(); 3:4: 5-Triiodobenzoates. The derivatives enumerated above are unsatisfactory for alcohol – ethers, e.g., the mono-ethers of ethyleneglycol (” cellosolves “) and the mono-ethers of diethyleneglycol (” carbitols”) .Crystalline derivatives of alcohol – ethers are readily obtained with 3 : 4 : 5-triiodobenzoyl chloride , for example : Place 0-5 g. of 3 : 4 : [...]]]> http://talkchem.com/reaction-mechanisms/96.html JSDraw.init(); Differentiation between primary, secondary, and tertiary alcohols (Lucas test). The test depends upon the different rates of formation of the alkyl chlorides upon treatment with a hydrochloric acid – zinc chloride reagent * (containing 1 mole of acid to 1 mole of anhydrous zinc chloride) and with hydrochloric acid. It applies only to aliphatic and cycfoaliphatic alcohols.To 1 [...]]]> http://talkchem.com/name-reactions/differentiation-between-primary-secondary-and-tertiary-alcohols-lucas-test.html http://talkchem.com/uncategorized/alcohols-2.html http://talkchem.com/uncategorized/alcohols.html