Trisodium Trimetaphosphimate Monohydrate

Abstract

The trimetaphosphimate anion (PO2NH)~-in trisodium cyclo-td-#-imido-triphosphate monohydrate, Na3(PO2-NH)3.H20, exhibits a chair conformation. Two trimetaphosphimate tings are linked to one another by six N--H.-.O hydrogen bonds forming pairs. These units are interconnected by O---H...O hydrogen bonds through water molecules forming columns.

A Systematic Approach to Alkali Biuretooxophosphates

“…[26][27][28] The bond lengths C-O and C-N (120-124 and 133-139 pm, respectively) are comparable to the distances observed in cyanurates and cyamelurates with the C-N(-P) bonds being 2- 3 pm shorter than the C-N(-C) bonds, but both in the range of C-N single bonds. [26][27][28] The bond lengths C-O and C-N (120-124 and 133-139 pm, respectively) are comparable to the distances observed in cyanurates and cyamelurates with the C-N(-P) bonds being 2- 3 pm shorter than the C-N(-C) bonds, but both in the range of C-N single bonds.…”

“…In contrast to most trimetaphosphimates that adopt almost a regular chair, twist, or boat conformation, [15,19,[26][27][28][29] the biuretooxophosphates are nearly planar. In contrast to most trimetaphosphimates that adopt almost a regular chair, twist, or boat conformation, [15,19,[26][27][28][29] the biuretooxophosphates are nearly planar.…”

Tetraammonium Tetrametaphosphimate Tetrahydrate

“…This poor level of information about tetrametaphosphimates contrasts with the well investigated structural chemistry of tetrametaphosphates (Durif, 1995) and the recently characterized crystal structures of some trimetaphosphimates (Stock & Schnick, 1996, 1997a which are useful starting materials in the synthesis of transition metal complexes (Sokol et al, 1982) and oxo-nitrido phosphates (Feldman, 1983). For the tetrametaphosphimates, only their properties as fertilizers and flame retardants have been investigated.…”

Synthesis, Crystal Structures and Properties of the Trimetaphosphimates Na2M(PO2NH)3 · 2H2O with M = K, Tl

“…1-, 2-and 3-dimensional arrangements) have been identified. Additionally, extended hydrogen bonding has been observed as a major structure directing factor in these compounds: In combination with monovalent cations the trimetaphosphimate ions form pairs [5,6,7], double layers [8], or build up a 3-dimensional network [9], respectively. In trimetaphosphimates of transition metals the [(PO 2 NH) 3 ] 3Ϫ ions act as mono-, bi-, or tridentate ligands of the metal atoms forming double chains [10] or complex anions like {M[(PO 2 NH) 3 ] 2 } 4Ϫ (with M ϭ Co, Ni, Zn) [11,2] or {M 4 (µ 4 -O)(µ-OH) 6 [(PO 2 NH) 3 ] 4 } 4Ϫ (with M ϭ Zr, Hf) [12].…”