Supramolecular architecture of diammonium ferrocene-1,1'-diyldiphosphinates

Diammonium ferrocene-1,1'-diyldi(H-phosphinate) (1) and diammonium ferrocene-1,1'-diylbis(phenylphosphinate) (2) were obtained for the first time and structurally characterized. Compound 1 shows a supramolecular 3D structure in the crystal; the structure is stabilized by hydrogen bonds between the layers of ammonium cations and the layers of ferrocene-1,1'-diyldiphosphinate anions. The more hydrophobic and sterically crowded ferrocene-1,1'-diylbis(phenylphosphinate) anion of compound 2 together with ammonium cations and solvate water molecules forms supramolecular 2D layers in the crystal.