By Mellor J.W.
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Presents accomplished insurance of the kinds of discounts gone through via many of the sessions of natural chemistry. Discusses rate reductions in response to what bond or useful team is decreased by means of diverse reagents. supplies unique realization to selective discounts which are compatible for the relief of 1 specific kind of bond or functionality with no affecting different bonds or features found in an analogous molecule.
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Extra info for A comprehensive treatise on inorganic and theoretical chemistry. F, Cl, Br, I, i, Na, K, Rb, Cs
5") for crystalline cyanuric acid are indicated. 24 A, and that much stronger bonds were formed when the C=O and N-0 bond directions make an angle of about 124" with each other. 87 A. Some of their work1- was carried out with partially deuterated cyanuric acid which was prepared by allowing ordinary cyanuric acid to stand for twenty-four to fortyeight hours in excess deuterium oxide. Maruha,% who has measured the magnetic susceptibility of cyanuric acid, favors the tri-enol structure but suggests that the ionic form (XVII) also contributes to the normal state.
L. Hinkel and G. Summers, J. Chem. ,1952,2813. 11. L. , J. Chem. SOL, 1930, 1834; 1932,2793; 1935,674; 1936, 184; 1940,407; 1949, 1953. 12. L. Siege1 and E. Williams, J. C L m . Phys.. 22, 1147 (1954). 13. F. Halverson and R. Hirt, J. Chem. , 19, 71 1 (1951). 14. R. Hirt and D. Salley, J . Chem. , 21, 1181 (1953). 15. R. Hirt, F. Halverson and R. Schmitt, J. Chem. , 22, 1148 (1954). 16. J. Lancaster and N. Colthup, J . Chem. , 22, 1149 (1954). 17. R. Wilbtatter and T. , 42, 1918 (1909). 18. 0. Diels and M.
111) (XVI tV) Compound (V), cyamelide, is not a triazine but it is frequently encountered in s-triazine chemistry. The cyclic structure (V) is written here for cyamelide but the linear structure postulated by Sidgwick may be the more correct Cyamelide (V) and cyanuric acid (111) Chapter I 34 are interrelated in this manner : heating cyanic acid above 150" gives117 cyanuric acid, but below that temperature cyamelide is the chief product. This transformation has been shownllB to be reversible with heat ; cyamelide can also be used as a more direct sourcello of cyanuric acid by heating it to its decomposition point in concentrated H2S0, and quenching rapidly with water.