AbstractDie Dehydratisierung des Dioxims (I) mit Thionylchlorid führt zum Furazan (II), das sich beim Erwärmen zum Nitriloxid (III) umlagert.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFurazans and furazan oxides. III. Acenaphtho[1,2-c]furazanA. J. Boulton and S. S. MathurCite this: J. Org. Chem. 1973, 38, 5, 1054–1055Publication Date (Print):March 1, 1973Publication History Published online1 May 2002Published inissue 1 March 1973https://pubs.acs.org/doi/10.1021/jo00945a043https://doi.org/10.1021/jo00945a043research-articleACS PublicationsRequest reuse permissionsArticle Views165Altmetric-Citations17LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Lattice theory has been used to obtain the expressions for the second- and third-order elastic constants for face-centered-cubic lattices in terms of the second- and third-order coupling parameters, considering the general interaction between the nearest-neighbor atoms. The number of constants have been reduced by expressing the third-order coupling parameters in terms of the coupling parameters of second order and second-order elastic constants. The general expressions of the elastic constants have been evaluated for Al, Cu, and Ni in a special case of central forces. The force constants involved in the expressions have been determined by representing the central interaction between the pair of atoms by the Morse potential function. It is found that the Cauchy relations for second-order elastic contants C12=C44 and for third-order elastic constants C112=C166 and C123=C456=C144 are satisfied in the case of central forces. It is also seen that the values of C111 for all the three metals are the largest and C112 is approximately half as that of C111 and almost all the values of C123 are negative and small compared with the other third-order elastic constants. The pressure derivatives of second-order elastic constants, the anisotropy factor, and the Debye temperatures have also been calculated for these metals. The values obtained are in good agreement with the experimental values available in the literature.

physica status solidi (b)Volume 41, Issue 1 p. K51-K55 Short Note Second and Third Order Elastic Constants of Cr, Mo, and W S. S. Mathur, S. S. Mathur Department of Physics, Indian Institute of Technology, Hauz Khas, New DelhiSearch for more papers by this authorY. P. Sharma, Y. P. Sharma Department of Physics, Indian Institute of Technology, Hauz Khas, New DelhiSearch for more papers by this author S. S. Mathur, S. S. Mathur Department of Physics, Indian Institute of Technology, Hauz Khas, New DelhiSearch for more papers by this authorY. P. Sharma, Y. P. Sharma Department of Physics, Indian Institute of Technology, Hauz Khas, New DelhiSearch for more papers by this author First published: 1970 https://doi.org/10.1002/pssb.19700410162Citations: 4AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume41, Issue11970Pages K51-K55 RelatedInformation

The second, third, and fourth order elastic constants have been calculated using the Morse potential function for seven face-centered cubic metals taking into consideration the truncation up to 134 nearest atomic interactions. The calculated values have been compared with the experimental data and have been used for calculating the pressure derivatives of the second order elastic constants. The agreement between the calculated values and the experimental results is quite good.

Ultrasonic velocities measured in twenty three organic esters at 20 Mc/sec., in the temperature range 10° to 50°C are reported. The results have been analysed to bring out the dependence of velocity and adiabatic compressibility on the molecular constitution of the liquids.

IN a recent communication1 in Nature, we confirmed a new method developed in this Laboratory for the determination of ultrasonic absorption (α) in liquids. Subsequent work2 has shown that the quantities of energy absorbed in cells, of small lengths, placed in the path of the sound beam with their incident faces occupying identical places, are in the proportion of their lengths. Utilizing this idea, we have evolved yet another technique for the measurement of α in liquids.

The thermal method developed in this Laboratory for the measurement of the ultrasonic absorption coefficient in liquids has been used elsewhere in a modified form. Re-examination of this new technique reveals that it is not capable of giving a value for the ultrasonic absorption coefficient of liquids.

A new method of determining the ultrasonic absorption coefficients in liquids has been developed. A small cell containing a liquid is placed in the path of the ultrasonic beam produced in the liquid under investigation and is surrounded by a constant temperature bath. The steady difference in temperatures of the liquids in the cell and outside is measured for different positions of the cell along the path of the beam. The ultrasonic absorption coefficient α/v 2 is determined from such measurements.

AbstractThe fatty acid composition of areca‐nut fat was determined by the usual ester‐fractionation method, using an electrically heated and packed column for fractional distillation under high vacuum (0.2 mm.). The glyceride structure was studied by crystallization of the neutral fat from acetone and ether; the composition of each of these glyceride fractions was studied by the fractionation method and the final possible glyceride composition computed therefrom. The chief component acids are lauric (19.5%), myristic (46.2%) and palmitic (12.7%), and in the unsaturated portion oleic (6.2%), linoleic (5.4%) and hexadecenoic acid (7.2%). Minor proportions of stearic, decanoic and of unsaturated monoethylenic C12 and C14 acids are also present. The chief component glycerides are (i) 56% of fully saturated (trimyristin, dimyristins and lauromyristopalmitin); (ii) 30% of mono‐unsaturated‐disaturated (mainly hexadecenolauromyristin, with some oleo‐(linoleo)myristopalmitins and dimyristins); (iii) 14% of diunsaturated‐monosaturated (oleolinoleoglycerides, mostly oleolinoleopalmitin). The glyceride composition follows closely Hilditch's rule of widest distribution of acyl radicals in the glyceride molecules. The fully saturated glyceride content of the fat, determined separately by the method of Hilditch & Lea,1 is 53.7%. The fully saturated components are found to contain (by the fractionation method) : 19.4% of lauric, 54.6% of myristic, 19.2% of palmitic and 6.8% of stearic acids. The proportions of various acids in the fully saturated components are similar to the corresponding ones in the saturated acid portion of the whole fat.

Summary Two samples of the liver oil of an Indian species of shark (Galeocerdo rayneri), one from the Arabian Sea, and the other from the Bay of Bengal, have been studied. Their component acids are reported. Tsujimoto's lithium salt acetone method has been adopted for the separation of highly unsaturated acid fraction from the mixed acids in one case while in the other the modified technique of Lovern has been followed. The insoluble acids have been further resolved into two fractions with the help of Hilditch's modified lead‐sal alcohol method. The efficient column (E.H.P.) of Longenecker has been employed for fractionation in the present work. The liver oils are found to belong to the fourth group of Tsujimoto's classification of the Elasmobranch fish liver oils. Shark liver oil No. 1 contains 40.9% saturated acids (palmitic 24.9%, stearic 11.1%, also myristic 3.3%, and minor proportions of lauric, arachidic, and lignoceric) and 59.1% unsaturated acids (C16 is 11.2%, C18 19.6%, C20 and above 27.1%, also some C12 and C14 monoethenoids). Shark liver oil No. 2 has the following composition: saturated acid 39.9% (palmitic 23.6%, stearic 14.5%, and myristic 1.5%, together with a minor amount of arachidic acid) and unsaturated acids 60.1% (mainly C16 10.9%, C18 23.3%, and C20 and above 25.7%; C14 acids are also present).The abnormal saturated acid content is discussed. These analyses provide the third instance of this peculiar group of Elasmobranch liver oils.