P,P'-Diphenyl-ethyl-enediphosphinic acid dihydrate

Area of Science:

• Crystallography
• Solid-state chemistry
• Organophosphorus chemistry

Background:

• Organophosphorus compounds are vital in various chemical applications.
• Understanding crystal structures informs material properties and synthesis.
• The title compound, C(14)H(16)O(4)P(2)·2H(2)O, was investigated for its structural characteristics.

Purpose of the Study:

• To elucidate the crystal structure of the title compound.
• To identify intermolecular interactions governing crystal packing.
• To characterize the hydrogen bonding network and its dimensionality.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
• Analysis of bond lengths, angles, and intermolecular contacts.
• Hydrogen bond analysis to identify and quantify interactions.

Main Results:

• The compound crystallizes with a crystallographic inversion center.
• Two phenylphosphonic acid groups are linked by methylene bridges.
• A two-dimensional network is formed via O-H⋯O hydrogen bonds involving water molecules, oriented parallel to the (101) plane.

Conclusions:

• The crystal structure reveals a specific arrangement of organophosphorus moieties.
• Water molecules play a crucial role in mediating hydrogen bonding and network formation.
• The observed two-dimensional network provides a basis for understanding crystal growth and potential applications in materials science.