Scanned by Charles Keller with OmniPage Professional OCR software TB is a triple bond. <.> is a dotted (coordinated) bond. "Emphasis" _italics_ have a * mark. [#] footnotes moved to EOParagraphs but NOT renumbered. (They are numbered "a" or "b" when two pages of notes are together.) Comments and guessed at characters in {braces} need stripped/fixed. Greek letters are encoded in <gr > brackets, and the letters are based on Adobe's Symbol font. ORGANIC SYNTHESES AN ANNUAL PUBLICATION OF SATISFACTORY METHODS FOR THE PREPARATION OF ORGANIC CHEMICALS _EDITORIAL BOARD_ JAMES BRYANT CONANT, _Editor-in-Chief_ HANS THACHER CLARKE ROGER ADAMS OLIVER KAMM _CONTRIBUTORS_ G. H. COLEMAN J, C. HESSLER E. P. KOHLER C. S. MARVEL W. A. NOYES G. R. ROBERTSON E. B. VLIET F. C. WHITMORE VOL. II. Caveat: Some numbers did not OCR correctly and may not have been corrected during the proofing! Check the 1941 print edition before trying these! INTRODUCTION TO THE SERIES THE publication of this series of pamphlets has been undertaken to make available in a permanent form complete detailed directions for the preparation of various organic chemical reagents. In announcing this purpose it may be well to mention at the outset some of the difficulties in the way of the research chemist, which it is hoped this series will be able to overcome. The cost of chemicals is prohibitive to the majority of chemists; this was true before the war when Kahlbaum's complete supply was available, and to-day with our dependence on domestic stocks, this cost has increased. The delay in obtaining chemicals, especially from abroad, even if the expense need not be considered, is an important factor. These difficulties have therefore thrown the research chemist on his own resources. The preparation of materials for research, always time consuming and annoying, is made increasingly so by the inexactness of the published information which so often omits essential details. Because of this, much needless experimentation is necessary in order to obtain the results given in the published reports. As the additional information thus acquired is seldom published, duplication of such experiments occurs again and again,-- a waste of time and material. It is hoped these difficulties may be remedied by the publication of this series of pamphlets. In other words, the authors hope to make this a clearing house for the exchange of information as to methods of preparation of some of the most needed organic chemical reagents.