Synthesis and crystal structures of aluminum and iron phosphites

Abstract

The hydrated forms of aluminum and iron phosphite were prepared and their structure was solved using X-ray powder diffraction data. The diffraction data for the aluminum phosphite powder sample was collected using synchrotron radiation (~. = 1.3087 A,) while that for iron phosphite was obtained from a rotating anode X-ray source. Both compounds crystallize in the monoclinic space group, P2~. Unit ceil parameters for the AI compound: a = 8.0941(1), b = 9.9137(1), c = 7.6254(1) A., ~ = 111.95~ Fe compound: a = 8.2548(1), b = 10.1814(1), c = 7.7964(1) (A,), fl = 111.94(1)". The Rietveld refined formula is M2(PO3H)3"4H20 (M=AI, Fe). There are two independent metal atoms in the structure and both are six-coordinated. One of them is coordinated by two water molecules and four phosphite oxygens. The other atom is surrounded by one water molecule and five phosphite oxygens. All the phosphite oxygens are involved in bridging the AI atoms. The geometry about AI, Fe, and P atoms is normal and they display expected bond parameters. The Lattice water is located in the cavity and is hydrogen bonded to phosphite'oxygen and water molecules.

Hydrothermal synthesis and crystal structure of two novel aluminophosphites containing infinite Al–O–Al chainsElectronic supplementary information (ESI) available: XRD patterns and views of NKX-1 and NKX-4. See http://www.rsc.org/suppdata/jm/b2/b200507g/

“…This frequency is characteristic of P-H stretching and indicates the existence of only one environment for the phosphite group. 10 Undergoing the hydrothermal synthesis procedure, P in NKX-1 and NKX-4 retains its P(III) oxidation state. The bands due to the PO 3 group or hydrogen bonded PO 3 group vibrations are seen in the region ca.…”

“…There are also a few reports describing the syntheses and structures of transition-metal phosphites. [10][11][12][13][14] Metal-phosphite contains the phosphite ion (HPO 3 ) 22 rather than phosphate (PO 4 ) 32 or phosphonate (RPO 3 ) 22 in the structures. They are of interest because the phosphite ion, (HPO 3 ) 22 , is structurally similar to phosphate [(PO 4 ) 32 ], having a tetrahedral geometry.…”

The synthesis and modification of aluminium phosphonates

“…30 Whilst Two parallel series of experiments were carried out: one single crystal X-ray diffraction experiments have been perusing AlMePO-b which contained 1,4-dioxane, and a second formed on the three methylphosphonates, only powder in which the 1,4-dioxane had been removed from AlMePO-b diffraction has been carried out on the phosphite, the structure by heating to 370 °C for 10 hours in a stream of nitrogen. of which was solved from these data; 29 O, was prepared in the following manner: methylorganic molecules, which appear to have some structurephosphonic acid and aluminium hydroxide, such that Al5P= directing influence. The only reported aluminium phenylphos-253, were ground together in a mortar and pestle.…”

Synthesis and Structure of a Novel Three-dimensional Organo-zincophosphite with Three Intersecting Channels

“…The two bands at 2375 and 2407 cm -1 indicate the presence of the H-P bond in two different environments. 11 The intense bands in the region of 963-1165 cm -1 are attributed to the asymmetric and symmetric stretching vibrations of the [HPO 3 ] 2groups. The symmetric and (HPO 3 ) 4 ] contains 14 independent non-hydrogen atoms, 10 of which belong to the framework (two Zn atom, two P atoms and six O atoms) and four to the guest (one N atom, one O atom and two C atoms), as shown in Figure 3.…”