Construction of two novel indium phosphites with (3,6)- and (3,5)-connected frameworks: Synthesis, structure and characterization

K2MnII2(H2O)2C2O4(HPO3)2: a new 2D manganese(ii) oxalatophosphite with double-layered honeycomb sheets stabilized by potassium ions

A novel 2D manganese(ii) phosphite containing oxalate bridges with double layered honeycomb sheets encouraged us to propose a new structural classification for metal oxalatophosphites with anionic frameworks.

Synthesis and electrochemical investigation of novel phosphite based layered cathodes for Li-ion batteries

Reversible lithium storage has been demonstrated in novel phosphite containing cathode materials, A₂[(VO)₂(HPO₃)₂(C₂O₄)]; A = Li, Na and K.

K6[Fe8.27(HPO3)12]: a new mixed-valence iron phosphite

The title compound, hexapotassium octairon(II,III) dodecaphosphonate, exhibiting a two-dimensional structure, is a new mixed alkali/3d metal phosphite. It crystallizes in the space group R3m, with two crystallographically independent Fe atoms occupying sites of 3m (Fe1) and 3m (Fe2) symmetry. The Fe2 site is fully occupied, whereas the Fe1 site presents an occupancy factor of 0.757 (3). The three independent O atoms, one of which is disordered, are situated on a mirror and all other atoms are located on special positions with 3m symmetry. Layers of formula [Fe3(HPO3)4](2-) are observed in the structure, formed by linear Fe3O12 trimer units, which contain face-sharing FeO6 octahedra interconnected by (HPO3)(2-) phosphite oxoanions. The partial occupancy of the Fe1 site might be described by the formation of two [Fe(HPO3)2](-) layers derived from the [Fe3(HPO3)4](2-) layer when the Fe1 atom is absent. Fe(2+) is localized at the Fe1 and Fe2 sites of the [Fe3(HPO3)4](2-) sheets, whereas Fe(3+) is found at the Fe2 sites of the [Fe(HPO3)2](-) sheets, according to bond-valence calculations. The K(+) cations are located in the interlayer spaces, between the [Fe3(HPO3)4](2-) layers, and between the [Fe3(HPO3)4](2-) and [Fe(HPO3)2](-) layers.

An unprecedented (3, 6)-connected net featuring tcj-3,6-P21/c topology

We present here an unprecedented tcj-3,6-P2₁/c (3, 6)-connected net based on both metal nodes and organic ligand nodes, featuring the (3 × 5²)(3² × 4² × 5⁵ × 6⁵ × 7) topology symbol.

Ammonium diphosphitoindate(III)

The crystal structure of the title compound, NH4[In(HPO3)2], is built up from In(III) cations (site symmetry 3m.) adopting an octa-hedral environment and two different phosphite anions (each with site symmetry 3m.) exhibiting a triangular-pyramidal geometry. Each InO6 octa-hedron shares its six apices with hydrogen phosphite groups. Reciprocally, each HPO3 group shares all its O atoms with three different metal cations, leading to [In(HPO3)2](-) layers which propagate in the ab plane. The ammonium cation likewise has site symmetry 3m.. In the structure, the cations are located between the [In(HPO3)2](-) layers of the host framework. The sheets are held together by hydrogen bonds formed between the NH4 (+) cations and the O atoms of the framework.