Triphosphoric acid, structure

Orthophosphoric acid containing three acid OH groups in the molecule offers many opportunities for the realization of surface-active molecular structures. But phosphoric acid also possesses the ability to form polyacids in an widespread manner. Pyrophophoric acid and triphosphoric acid are substances that have been known for a long time. This presents further possibilities for interesting synthesis. 

The ability of phosphoric acid to form condensed molecules is an additional effect. Examples of this kind of acid are pyrophosphoric acid, H4P207 structure (1), and triphosphoric acid, H5P3O 0 structure (2) ... 

This formula also corresponds with the fact that dissociation is strong in three and weak in two of the five H+ ions in triphosphoric acid (250). The correctness of the structural formula is also supported by the quantitative formation of triphosphate from trimetaphosphate on cleaving the anion ring with strong alkali (90, 311). Final proof for the structure of the tri-... 

Problem 13.16 Alkyl esters of di- and triphosphoric acid are important in biochemistry because they are stable m the aqueous medium of living cells and are hydrolyzed by enzymes to supply the energy needed for muscle ontraction and other processes, (a) Give structural formulas for these esters, (b) Write equations for the lydrolysis reactions that are energy-liberating. ... 

In addition to the usual adenine nucleotides (such as adenosine 5-phosphate, adenosine 5-pyrophosphate, and adenosine 5-triphosphoric acid) present in bacterial extracts, several adenine nucleotides of uncertain structure have been reported. These substances, termed adenylyl peptides have been isolated from trichloroacetic acid extracts of Staphylococcus aureus ... 

Certain inorganic and simple carbon-containing compounds are commonly given non-systematic or semi-systematic names containing the word acid . Examples are boric acid or orthoboric acid, metaboric acid, phosphoric acid, diphosphoric acid, cyc/o-triphosphoric acid, cafena-triphosphoric acid, dithionous acid, peroxodisulfuric acid or peroxydisulfuric acid, etc. These names are unique in modern nomenclature in that, interpreted literally, they describe a particular chemical property of the compounds in question. Systematic names are otherwise based solely on composition and structure. 

However, italicize and hyphenate cyclo as a nonintegral structural descriptor, cyc/o-triphosphoric acid cyc/o-octasulfur... 

When H3PO4 is heated at 510K, it is dehydrated to diphosphoric acid (equation 14.128). Comparison of the structures of these acids (Table 14.7) shows that water is ehminated with concomitant P—O—P bridge formation. Further heating yields triphosphoric acid (equation 14.129). 

Phosphorus forms more oxoacids than any other element, and the number of oxoanions and 0x0 salts ranks second only to silicon. Phosphoric acid, H3PO4, ranks seventh among the top 50 chemicals in production, and sodium tripolyphosphate, NasPsOio, ranks just outside the top 50. NasPsOio may be regarded as a salt of triphosphoric acid, H5P3O10, whose structure is as follows ... 

There are many oxoacids containing phosphorus. Some examples are phosphorous acid (H3PO3), phosphoric acid (H3PO4), hypophosphorous acid (H3PO2), and triphosphoric acid (H5P3O10) (the structures of which are shown in Figure 24.11). Phosphoric acid, also called ortho-phosphoric acid, is a weak triprotic acid. It is prepared industrially by the reaction of calcium phosphate with sulfuric acid ... 

The adenine nucleotide system consists of the following members adenosine 5 -phosphoric acid (AMP), adenosine diphosphoric acid (ADP), and adenosine triphosphoric acid (ATP). The structures of these compounds are given in Fig. 5. These structures have been confirmed by the classical chemical synthesis of Todd and his co-workers. ... 

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