Enantiomorphous pair of unsymmetrical cobalt glycine. Very similar features of theoretical interest may again be expected in the class of the metallic dithiocarbamates about which there can scarcely linger any constitutional obscurities in view of the very convincing work of Delépine. These substances possess considerable crystallising powers, a fact which the author has been able to verify. Finally, there is the very important group of compounds, investigated by Tschugaev, which may be represented by formulæ of the types Pt(DH)2 and NH, Co(DH2), in which DH signifies the following residue of diacetyldioxime CI CH3 C- -C.CH3 NOH NO Although many other cases could be cited, the above enumeration would appear to complete the list of substances which may be considered suitable, both by reason of their accessibility and crystallising power. The author would emphasise the fundamental feature common to all, namely, their neutral character, which has its origin in the perfect saturation of all the valencies, both principal and subsidiary, within the co-ordination sphere. Although obviously enhancing the theoretical value of any optical resolution, the neutral character of the substances in question introduces considerable difficulties in the technique, for the employment of an optically active base or acid is out of the question. There only remains the method of spontaneous crystallisation, or, in other words, the chance that the substances may resolve themselves. As already mentioned, no positive success can be recorded up to the present; certain of the substances, including the stereoisomeric cobalt glycines, have been definitely abandoned. In conclusion, it may be pointed out that the above stereochemical considerations lead immediately to the theoretical possibility of a novel kind of molecular enantiomorphism amongst organic substances. Thus a CP2 CQ2 CQ2 CP2 compound of the type although possessing a symmetrical configuration, is nevertheless enantiomorphous. If the chemist will accept the only precise meaning that can be given to the term asymmetric atom," namely, an atom devoid of all symmetry, he will doubtless come to the conclusion that the above type of structure contains no asymmetric atom. 296. "Synthesis of Pinacones." (Part II.). By WILLIAM PARRY. The action of sulphuric acid on some of the unsym metrical pinacones described in Part I. (Trans., 1911, xcix., 1169) has been studied. (1) 88-Dimethylhexan-y-one, CMe2Et COEt, obtained when 8-methyl-y-ethylpentane-By-diol is heated with dilute sulphuric acid, is a colourless oil with an odour of peppermint, boiling at 148-1522/773 mm. On oxidation with chromic acid mixture it yields (i.) carbon dioxide, (ii.) acetic acid, (iii.) aa dimethylbutyric acid, CMe2Et CO2H, thus proving its constitution. (2) -Dimethyloctan-d-one, CMe, Pra COPra, obtained by the action of cold concentrated sulphuric acid on 6methyl-y-propylhexane-By-diol, is a colourless oil with a faint odour of peppermint, and boils at 182-186°/765 mm. The semicarbazone forms white needles, melting at 145°. The constitution of the pinacolin is proved by its oxidation to (i.) acetic and propionic acids by chromic acid CHEMICAL NEWS Jan. 8, 1915 mixture, (ii.) aa-dimethylvaleric acid, CMe2Pra CO2H, by chromic acid in glacial actic acid. (3) The pinacone, OH CMe2 C(C5H11)2'OH, is obtained by the interaction of magnesium isoamyl bromide and ethyl a hydroxyisobutyrate; it forms white, waxy needles, melting at 34-35°. By cold concentrated sulphuric acid it is converted into Bi-tetramethyldecan--one, CHI CMe2 CO C5H11, a yellow oil, boiling at 132-134°/25 mm., which does not form a semicarbazone. The constitution of this pinacolin is proved by its oxida tion to (i.) isovaleric acid, by chromic acid mixture; (ii.) and trimethylhexoic acid, C5H1 CMе2 CO2H, by chromic acid in glacial acetic acid. (4) -Diphenylbutan-8-one, CMe Ph2 COMe, is obtained as a yellow oil, b. p. 180°/18 mm., when a diphenyl-8-methylpropane aß-diol is heated with dilute sulphuric acid. It solidifies when seeded with a crystal of the acetophenonepinacolin described by Thoerner and Zincke (Ber., 1878, xi., 1989), and then melts at 41°, thus proving the identity of the two pinacolins. Further confirmation of this identity is afforded by the oxidation of the yellow oil to aa-diphenylpropionic acid, CMe Ph2 CO2H, by chromic acid mixture. 297. "Substitution in Aromatic Hydroxy-compounds. Part II. Acctyl-nitro-substitution." By VICTOR JOHN HARDING. An account was given of the action of nitric acid on various methoxyacetophenones. In those cases where the acetyl group occupies a position which, in the parent phenol ether, is active to nitric acid, it is found that the acetyl group is displaced by the nitro-group. This is termed acetyl-nitro-substitution. The following acetophenones are found to undergo this substitution: (a) 3:4-dimethoxyacetophenone, (b) 4: 5-dimethoxy-o-tolyl methyl ketone, (c) 3:4: 5-trimethoxyacetophenone : CHEMICAL NEWS, } Jan. 8, 1915 Telephone-Holborn 6380. Advertisements iii Telegrams-" Silexate, London." Vacuum tubes of all descriptions in TRANSPARENT QUARTZ GLASS Apparatus to Customers' own designs a speciality. Catalogue and Sample tube free. THE ALCHEMICAL The Silica Syndicate, Ltd., 82, Hatton Garden, London, E.O. SOCIETY was formed in 1912 for the study of the early history of Chemistry and the works and THE JOURNAL OF THE ALCHEMICAL SOCIETY, Edited by H. STANLEY REDGROVE, B Sc., F.C.S. (Author of " Alchemy: Ancient and Reprints of the 1913 Address of the Honorary President, Prof. JOHN FERGUSON, LL.D., &c., on "Some English Alchemical Books," may be obtained from the Publisher at 18. net per copy. The Annual Subscription to the Society is 10s. 6d. Members receive the Journal gratis, and those desirous of doing so, may receive Les Nouveaux Horizons, the official publication of La Société Alchimique de France, free of charge, except postage (6d. per annum). For further particulars apply to the Honorary Secretary, Mr. SIJIL Abdul-Ali, 26, Bramshill Gardens, Dartmouth Park, London, N.W. iv Advertisements CHEMICAL NEWS, FREDK. JACKSON & CO., Ltd., ORSAT GAS ANALYSIS APPARATUS. 44, CHAPEL STREET, SALFORD, Near TELEPHONE NO.: 2038 Central. TELEGRAPHIC ADDRESS: BALANCES. Apparatus, Manchester. GENERAL CHEMICAL APPARATUS, HEMPEL and ORSAT GAS ANALYSIS THE LONDON GAS REFEREES' GAS BURETTES OF VARIOUS KINDS. ILLUSTRATED PRICE LISTS FREE ON APPLICATION. GENERAL INDEX TO THE CHEMICAL NEWS. Vols. 1 to 100 (1860 to 1909). Pp. 712. "A great service has been now performed for the active chemist in making this mass of material easily accessible through a general index. It is evident that no pains have been spared to make this work as complete aud All those interested, particularly in chemistry and chemical industry, will be grateful to the management of the Chemical News for bringing to completion this great work."-American Journal of Science, July, 1913 accurate as possible. "The Index seems very complete, and forms an interesting survey of the period covered by it. It should be of great value to chemists who possess files of the Chemical News "Journal of the Franklin Institute, July, 1913. "It is not merely a compilation of all the volume indexes, but is much more elaborate. Every possessor of a set of the Chemical News, whether complete or partial, will do well to add this most valuable volume to his library."Journal of the American Chemical Society, August, 1913. "Although the Index contains two thousand one hundred and thirty-six columns, the book is of a convenient size and is only an inch and five-eighths thick. All chemists should show their appreciation of the enterprise of the Chemical News by adding this valuable Index to their library."-Knowledge, November, 1913. "This Index covers all material in the issues of the Chemical News for the first fifty years, and should be of inestimable value to every working chemist, whether a subscriber to the Chemical News or not."-Journal of Industrial and Engineering Chemistry, November, 1913. "The value of the Index is obvious Considerable pains have been taken to render it a trustworthy source of reference, and the plan has been adopted of including in it both subjects and authors. This has rendered it a some. what large volume, but the method facilitates reference, for it sometimes happens that the name of the author escapes memory, or the subject connected with his name may be forgotten. Since the references go back so far, the Index enables the reader to trace the development in many cases of industrial science analytic processes, and so orth."-The Lancet, November 22, 1913. Orders should be sent to CHEMICAL NEWS, 16, NEWCASTLE STREET, FARRINGDON STREET, LONDON, E.C. London: Printed and Published for the Proprietor by EDWIN JOHN DAVEY, at the Office 16 Newcastle Street, Farringdon Street, E.C January 8, 1915. JAN 25 1915 THE CHEMICAL NEWS AND JOURNAL OF PHYSICAL SCIENCE Edited by Established [Sixty-nine years. Sir Wm. Crookes, O.M., Pres.R.S.] (WITH WHICH IS INCORPORATED THE "CHEMICAL GAZETTE"). Vol. III.-No. 2877. [Copy Friday, January 15, 1915. ARTICLES: reserved. CONTENTS. Tariffs, Free Trade, and Industry, by J. Taylor Peddie Institute of Industry and Commerce... PROCEEDINGS OF SOCIETIES CHEMICAL SOCIETY PAGE .......... 25 27 29 31 32 34 35 SOCIETY OF CHEMICAL INDUSTRY........................................................... CORRESPONDENCE.-National Dye Industry CHEMICAL NOTICES FROM FOREIGN SOURCES...................... MISCELLANEOUS MEETINGS FOR THE WEEK.. ......... 36 CAPPER PASS & SON, LIM. BRISTOL, are Buyers of LEAD ASHES, SULPHATE OF LEAD, LEAD SLAGS, ANTIMONIAL LEAD COPPER MATTE, TIN ASHES, &c., ORES, DROSS, or RESIDUES containing TIN, COPPER, LEAD, and ANTIMONY. то Registered as [PRICE_44. a Newspaper. Post Free 414. A young Russian Lady (Doctor of Science), trained at the University of Liége, seeks Employment in a Chemical Laboratory. Speaks Russian, French, German, and English. -Address, I. B., CHEMICAL NEWS Office, 16, Newcastle Street, Farringdon Street, London, E.C. A Belgian Refugee Engineer, Manager of a Chemical Works, seeks Employment during the War.-Address, FERN. LEROY, 6, Central Hill, Upper Norwood. A vacancy occurs for a Pupil or Apprentice in a Gold and Silver Refining business and Assay office. Excellent opportunity for intelligent youth desirous to take up Mining and Metallurgy. Salary paid. Moderate premium.-Address, "R. 32," CHEMICAL NEWS Office, 16, Newcastle Street, Farringdon Street London, E.C. Chemist, highest Academic qualifications, seven years' experience in Research, fluent German and French, is open for Engagement.-Address, C. H., CHEMICAL NEWS Office, 16, Newcastle Street, Farringdon Street, London, E.C. Lady Analytical Chemist required for manu facturer's Laboratory in the East of London. Must be fully qualified to undertake Analytical Investigations. A knowledge of Research Work an advantage. State experience, salary required, &c. --Address, L. A., CHEMICAL NEWS Office, 16, Newcastle Street, Farringdon Street, London, E.C. O LET, S.E. London, Fitted LABORA- entrance. Address, "L. 4," CHEMICAL NEWS Office, 16, Newcastle OZONE GENERATORS, For BLEACHING and DEODORISING OZONAIR, Limited, 96, VICTORIA STREET, LONDON, S.W. SULPHUROUS ACID and SULPHITES. Liquid SO2 in Syphons, for Lectures, &c. PHOSPHORIC ACID and PHOSPHATES. CARAMELS & COLORINGS for all purposes. A. BOAKE, ROBERTS & CO. (LIMITED), Stratford, London, E. Analyst, holding many Public Appointments and having a large and varied practice, has a vacancy in his Laboratory. No premium. -Aply "Analyst," 2, Queen Anne's Grove, Bedford Park, W. WANTED.-Miscellaneous Chemical Ap paratus and Laboratory Fittings, particularly Boverton Redwood's Viscosimeter; also Bomb Calorimeter.-Address, "L. 2," CHEMICAL NEWS Office, 16, Newcastle Street, Farringdon Street, London, E.. FOR SALE.-Long Beam Oertling Balance, Becker Balance and Weights, Expensive Binocular Microscope. -Address, "L. 3," CHEMICAL NEWS Office, 16, Newcastle Street, Farringdon Street, London, E.C. In Medium 8vo. Handsome Cloth. Illustrated. Pp. i-xix + 359. 258. net. CELLULOID: ITS MANUFACTURE, APPLICATIONS, and SUBSTITUTES M.A. (Camb), B.Sc (Lond.), Ph.D. (Heidelberg). London: CHarles GriffIN & CO., Ltd., Exeter St., Strand. CHEMICAL APPARATUS Pure Chemicals for Research Work. JOHN J. GRIFFIN & SONS, LTD.. KINGSWAY, LONDON, W.C. SERVICE for the PERIOD of the WAR. AMATEUR PHOTOGRAPHER Military Training. Ages 18-35. THE for raising a Battalion of 1000 men, which will be strictly limited to Public School or University Men, and who will serve together as a Unit. Training is now going forward. and PHOTOGRAPHIC NEWS. Edited by F. J. MORTIMER, F.R.P.S. Price TWOPENCE-Every TUESDAY. The Leading Paper for Everyone interested in Photography, Special Articles on PICTORIAL and Enrolment is proceeding at, and application should Modern ScientIFIC PHOTOGRAPHY. be made at once to ROYAL NAVAL DIVISION, 6, 7, 8, Old Bond Street, London, W. Phone -REGENT 5515. GOD SAVE THE KING. Cloth, 316; Paper covers, 216. (Postage, 4d. extra). THE WHEAT PROBLEM: Based on Remarks made in the Presidential Address to the British Association at Bristol in 1898. REVISED WITH AN ANSWER TO VARIOUS CRITICS By SIR WILLIAM CROOKES, F.R.S. WITH PREFACE AND ADDITIONAL CHAPTER, BRINGING THE With Two Chapters on the Future Wheat Supply of the OPINIONS of the PRESS. "In this bulky volume Sir William reproduces the gist of the sensational Bristol Address, and supplements it with carefully prepared answers to his chief critics and confirmatory chapters on the future wheat supply of the United States."-Morning Post. "The appearance of the papers in this convenient form will be welcome to everyone who appreciates the importance of the problem."-Scotsman. "The student of economic science and sociology will find this volume full of interesting material. . . The entire subject is of the profoundest interest, and an excellent purpose has been served by the publication of these papers in a single volume."-The Eagle (Brooklyn, N.Y.). "Sir William Crookes's statistics seem to make good his alarmist statement."-British Weekly. CHEMICAL NEWS OFFICE, 16, NEWCASTLE ST., FARRINGDON ST,, E.C. The best and brightest Photographic Weekly for the Beginner or Advanced Worker. |