Organic chemistry Phosphoric acid

Challis, B. and Challis, J. (1979). Amides and related compounds. In Comprehensive Organic Chemistry, Nitrogen Compounds, Carboxylic Acids, Phosphorous Compounds, Sutherland, I.O. (ed.), Vol. 2, p. 957. Pergamon Press, Oxford... 

J. S. Roberts in D. Barton u. W.D. Ollis, Comprehensive Organic Chemistry, The Synthesis and Reactions of Organic Compounds, Bd. 2 in O. Sutherland, Nitrogen Compounds, Carboxylic Acids, Phosphorous Compounds, S. 185ff., Pergamon Press, Oxford 1979. 

Fig. 14.3. (a) The four organic bases present in DNA. Each base is attached to a ribose molecule through a bond from the nitrogen, (b) Structure of deoxyadenosine, a nucleotide formed from phosphoric acid, deoxyribose, and an organic base, adenine. (Reprinted from T. L. Brown and H. E. LeMay, Chemistry The Central Science, Prentice-Hall, 1977.)... 

The acid HIO4 is known as periodic or mefaperiodic acid, whereas H5IO6 is known as orthopedodic acid or sometimes paraiodic acid. The prefixes have nothing to do with their usual meaning in organic chemistry. Note the similarity to the phosphoric acid names (see Chapter 13). 

Protection of Phosphoric and Related Acids. Eckstein, F. In Protective Groups in Organic Chemistry J. F. W. McOmie, Ed. Plenum Press, New York, 1973 pp 217-234. 

Oxidation and incorporation of nitrogen usually affect the surface chemistry of carbons [12, 20, 24]. The types and numbers of basic and acidic groups evaluated using Boehm titration [3, 4]. are collected in Table 2. The data reported indicate that the initial carbons differ in their acidity as a result of the activation method and the type of an organic precursor [1]. BAX is more acidic than BPL. This is expected for a phosphoric acid activated carbon [25]. After modification with urea and heat treatment at 723 and 1223 K, the overall surface chemistry... 

Extraction processes (TRUEX, PUREX, Talspeak, DIAMEX, PARC, etc.) generally involve complexation of transplutonium elements by alkyl phosphines, phosphine oxides, phosphoric acids, carbamoyl phosphonates, diamides, and thiophosphinates in aqueous/organic extractions, within derivatized solid supports, or on coated particles. There are excellent reviews of the processes and significant complexes by Mathur et al. and selected chapters in The Chemistry of the Actinide and Transactinide Elements to be published in 2003. " Work on the separation for nuclear waste management in the United States, France, and Russia have been reviewed. " ... 

Established in Manchester, Todd continued research on vitamin E and the constituents of Cannabis. He had many wartime commitments, including research on chemical defence and antimalarials, and was a member of the British team on penicillin. He was, however, able to begin the work whose ultimate objective was the synthesis of the nucleotide coenzymes, several of which are closely related to the B vitamins, and potentially leading to a study of the nucleic acids. Attention was directed initially to each of the components, the heterocyclic bases, the nucleosides, and the chemistry of phosphoric esters. This broad strategic plan,3 begun in Manchester, was continued and expanded when Todd was appointed to the Chair of Organic Chemistry in Cambridge in 1944. 

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