By M. Volkan Kisakürek, Edgar Heilbronner
This booklet offers a entire evaluate of greater than seventy five years of Swiss chemical examine. best authors, between them L. M. Venanzi, H. Zollinger, E. Heilbronner and J. D. Dunitz, spotlight remarkable items of analysis that experience seemed in Helvetica Chimica Acta due to the fact its origin, in 1917.
This number of hugely readable essays should be of significant curiosity to chemists, historians of chemical technology, and someone who desires to comprehend extra in regards to the interesting improvement of Swiss chemistry within the 20th century.
Content:
Read or Download Highlights of Chemistry: as Mirrored in Helvetica Chimica Acta. Copublished with VHCA Publishers, Basel. PDF
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Additional resources for Highlights of Chemistry: as Mirrored in Helvetica Chimica Acta. Copublished with VHCA Publishers, Basel.
Example text
Wiberg and B. R. Lowry. J. Am. ehern. Soe .. 85. 3188 (/963). 17 x 10- 6 sec· I for acetolysis of neopentyl tosylate. 2Joctyl acetate. Reaclion 3: K. B. Wiberg and B. R. loc. • give kRO as 33 x 10- 6 sec-I as the tOlal rate constant for acelolysis and re arrangement. The product is 90 ';<, 1-norbornyl tosylate. 8,%, 1-norbornyl acetate. and 2 "'" unrearranged acetate. Reaction 4: D. Roberts. J. Org. ehern .. 09 x 10 I sec - I. The values of k", for reactions 6 and 7 also appear to have been determined via the value of k"Jor reaction 4.
W. , J. Chern. , 2, 833 (1970), or estimated using the additivity rules ofS. W. Benson, F. R. Cruiekshank, D. M. Golden, G. R. Haughen, H. E. O'Neal, A. S. Rodgers. R. Shaw, and R. Walsh, Chern. , 69, 279 (1969). "Dimensionless. CH,-·CH 2 -OH HO ~OH HO~OH HO ~OH f\. HO OH Comparison Reaction Table 8. 09 x 10- 5 (mole liter-I) Kr "Data [rom D. R. Stul\. E. F. Westrum. and G. C. Sinke. The Chemical Thermodynamics of Organic Compounds. John Wiley & Sons. lnc .. New York (1969) or estimated using the additivity rules 01' S.
However, solvolysis of deuterium-Iabeled ethyl toluene-p-sulfonate in fluorosulfuric acid yields a product with 30-40 % rearrangement,24 and it is possible that a bridged ion is an intermediate in this reaction. It has also been found that when C0 3 CH zF is allowed to react with excess SbF 5-S02, FS0 3 H-SbF S-S02, or HF-SbF S-S02 at - 78'C rapid deuterium scrambling occurS. 25 If such solutions are quenched with cyclohexane or cyclohexane-d 12 , the resulting ethane has the deuterium completely randomized.