Robertson, General

Elix and co-workers in a series of papers have examined the Diels-Alder reactions between 2-vinylbenzofurans and both ethylenic and acetylenic dienophiles. The former type of reaction, first observed by Kamthong and Robertson, generally results in good yields of tetrahydro-dibenzofurans, and the autoxidation and stereochemistry of the products have been studied. Acetylenic dienophiles often give dibenzofurans directiy. ... 

Certain dithiolium salts have been reported by Leaver and Robertson to form isothiazoles on treatment with ammonia thus, 3,5-diphenyl-l,2-ditholium perchlorate (15) gives a 50% yield of 3,5-diphenylisothiazole (16). The method does not appear to be generally applicable, and the analogous 3-methyl-5-phenyl-l,2-dithiolium salt did not give an isothiazole. 

In general, when the equipment is either difficult to operate or very expensive, it is desirable to specify equipment large enough to handle the expansion. Whenever this is done, calculations must be made to determine whether the equipment can produce the desired result for both the initial and the expanded conditions. Whenever this is not the case, the equipment should be sized for the initial rate. Then, when the expansion occurs, another unit may be added in parallel or in series. Plans for this should be made at the initial stages of design, so that adequate space can be reserved for this equipment. Much of the material that follows on specific types of equipment was obtained from an article by James M. Robertson.5... 

Wang, J., Trudeau, M.C., Zappia, A.M. and Robertson, G.A. (1998) Regulation of deactivation by an amino terminal domain in human ether-a-go-go-related gene potassium channels. The Journal of General Physiology, 112, 637-647. 

General. All reactions were performed under nitrogen. H NMR and NMR spectra were recorded in ppm (5) on a 300 MHz instrument using TMS as internal standard. Elemental analyses were performed by Robertson Micolit Laboratories. Anhydrous THE, toluene, and tert-butyllithium in pentane (1.7 M) were purchased. Flash chromatography was performed with silica gel 60 (230-400 mesh). Melting points were determined and are uncorrected. 

Cyril Falls, The First World War (London Longman Green, 1960), pp. 376-80. Robertson to Lt.-General G.F. Milne, 7 Nov. 1916, in The Military Correspondenee of Field Marshal Sir William Robertson, Chief of the Imperial General Staff, Deeember 1915-February 1918, ed. David Woodward (London Bodley Head for Army Records Society, 1989), p. 102. 

Kuenen, J. G., and Robertson, L. A. (1987). Ecology of nitrification and denitrification. In The Nitrogen and Sulfur Cycles (J. A. Cole and S. Ferguson, eds.), Symp. No. 42, pp. 161-218. Society of General Microbiology, Cambridge Univ. Press, London. 

The crystal structure of benzene itself is even more difficult, and it is only quite recently that accurate results have been obtained. The early work on naphthalene and anthracene was also inconclusive and did not at first lend any support to the idea of strictly planar molecules. The first really conclusive results were obtained for the molecule of hexamethylbenzene (Lonsdale, 1929). In the triclinic crystal structure the atoms occupy general positions, but a careful study of the intensities of the reflections, particularly those from the pronounced cleavage plane in which the molecule is found to lie, established that the molecule was planar to within narrow limits, and also that the benzene ring was a regular hexagon. Soon afterwards the more difficult structures of naphthalene and anthracene were fully analysed with the aid of absolute intensity measurements and the use of Fourier methods of analysis (Robertson, 1933a), and it was shown that the atoms were coplanar to within a few hundredths of an Angstrom unit. 

Robertson, O.H., Hane, S., Wexler, B.C. and Rinfret, A.P. (1963). The effect of hydrocortisone on immature rainbow trout (Sabno gairdnerii). General and Comparative Endocrinology 3,422-436. 

Robertson, M. P., and Scott, W. G. (2008). A general method for phasing novel complex RNA crystal structures without heavy-atom derivatives. Acta Crystallogr. D Biol. Crystallogr. D64, 738—744. 

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