The Crystal Structures of Iron(III) and Potassium Dihydrogen Triphosphate.

The Networks of Acidic Phosphate Anions

“…A three-dimensional arrangement of [H2P3O10] 3 " anions was observed in FeH2P30io [3]. The main geometrical data of the hydrogen-bond scheme are gathered in Table 6.9, but this arrangement is so intricate that no drawing has been reported.…”

“…Averbuch-Pouchot and Durif [32] prepared Sr 3 Cs4H2(P40i2) 3 and perfor med the structure determination of this salt, closely related to the atomic arrangement of Al4(P40i 2 ) 3 , but could not determine the location of the hydro gen atoms. Chemistry of higher phosphoric rings does not provide any example of acidic anions.…”

“…In K3H2P3O10H2O [3], the [H2P3O10] 3 " anionic network forms an infinite bidimensional layer. This compound is a layered arrangement built by sheets of potassium atoms alternating with anionic layers including the water mole cules.…”

“…For monovalent-cation acidic triphosphates, one can report four ammonium compounds, (NH 4 )3H 2 P3O 10 (I), (NH 4 )3H 2 P3O 10 (II), (NH 4 )4HP3O 10 , and (NH4)gH(P30io)2-2H20, characterized by Farr et al [2] during a study of the NH3-H5P3O10-H2O system and K3H2P3O10H2O whose chemical preparation and crystal structure were described by Lyutsko and Johansson [3].…”

Conformation and Packing of Cobalt(III) Sepulchrate Dihydrogentriphosphate Hexahydrate

“…The folding of the P 1--O4--P2--O7--P3 chain is forced by the strong hydrogen bond 02-..H2P.--O 10 which keeps the two extremities of the anion together, giving an eightmembered highly puckered ring. This hydrogen-bonded cyclization occurs in all the five compounds containing the H2P3Old-anion retrieved by an ICSD search (Inorganic Crystal Structure Database, release January 1994) (Merritt & Sundaralingam, 1981;Lutsko & Johansson, 1984;Lutsko, Lyakhov, Tuchkovskii & Palkina, 1991;Lyakhov, Palkina, Lutsko, Maximova & Chibiskova, 1990;Lyakhov, Lutsko, Tuchkovskii & Palkina, 1991). For a sixth compound containing the anion, the hydrogen coordinates are not provided (Palkina, Maksimova & Kuznetsov, 1979).…”