Lassar-Cohn

Here only a general review of methods and manipulations has been given, in so far as they are employed in the preparative exercises. The comprehensive and thorough works of Lassar-Cohn, Hans Meyer, and Houben-Weyl should be consulted for special requirements. 

A. H. Hooker, Chloride of lime in Sanitation, New York, 1913 Lassar Cohn, Arbeils- methoden fttr organischchemische Laboratorien, Hamburg, 1901. 

The authors beg to acknowledge assistance received directly and indirectly from well-known text-books by the following authors—Adams and others, Barnett, Barrowcliff and Carr, Cain, Cain and Thorpe, Cohen, Elbs, Fiertz-David, Fischer, Gattermann, Henderson, Knecht and Hibbert, Lassar-Cohn, Hans Meyer, Meyer-Jacobson, Meyer-Tingle, Perkin, F. M., Sudborough and James, and Ullmann. 

Acylation (Acidylation). A reaction leading to the formation of an org compd contg one or several acyl radicals, RCO-Refs l)Lassar-Cohn, "Arbeitsmethoden... 

Fused potassium acetate, according to the experiments of Lassar-Cohn,8 yields at the cathode methane, hydrogen, and... 

Chemistry of Daily Life, Lassar-Cohn. J. B. Lippincott Co. 1.75. 

In taking up a more detailed study of nitration, the general methods of preparing nitro compounds may first be mentioned. The usual methods involve the action of nitric acid alone, or in the presence of sulfuric acid, or of water, or of a non-ionizing medium such as ether. Other methods involve the use of ethyl nitrate or of nitrosulfates (NO2.OSO2.OII), nitroacetates (or acetyl nitrate), etc. For methods used in isolated cases reference must be made to the books of Weyl, Lassar-Cohn, and others. 

By Dr. Lassar>Cohn, Professor of Organic Chemistry at the University of KSnigsberg. Authorized Translation by J. Bishop Tingle, Ph.D. lamo, vii 4-101 pas i cloth, i.oo. 

This well-known bile acid was first reported by Latschinoff in 1885 (26). LatschinofF isolated the compound from ox bile, named it choleic acid, and recognized that it had a lower oxygen content than the trihydroxy acid, cholic acid. One year later Mylius (27, 28) reported an acid from putrefied ox bile which he named deoxycholic acid. Latschinoff (102) and later Lassar-Cohn (103, 104) presented evidence that choleic acid and deoxycholic acid were the same compound, but uncertainty continued until Wieland and Sorge (29) discovered the nature of the molecular complex that is choleic acid. Originally this name was applied to the stable mixture of eight molecules of deoxycholic acid and one molecule of fatty acid but later choleic acids were shown to form between deoxycholic acid and a variety of acholic compounds. The subject of choleic acids was thoroughly reviewed by Sobotka (7) and by Fieser and Fieser (1). 

Weyl, IMeyer, Lassar-Cohn, etc. Some of the more elementary laboratory manuals give excellent treatments of the subject. This is true especially of Gattermaiin s Practical Organic Chemistry, Noyes Organic Chemistry for the Laboratory, and Pisher s Laboratory Manual of Organic Chemistry. 

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