Hexaaquanickel(II) bis(4',7-dimethoxyisoflavone-3'-sulfonate) octahydrate

Area of Science:

• Inorganic Chemistry
• Crystallography
• Materials Science

Background:

• The study of metal-organic compounds is crucial for developing new materials with specific properties.
• Understanding crystal structures provides insights into intermolecular forces and material stability.
• Isoflavone derivatives are of interest due to their diverse biological and chemical applications.

Purpose of the Study:

• To elucidate the crystal structure of the novel nickel(II) compound, [Ni(H2O)6](C17H13O7S)2·8H2O.
• To investigate the intermolecular interactions, including hydrogen bonding and pi-pi stacking, within the crystal lattice.
• To describe the formation of the three-dimensional supramolecular structure.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the precise atomic arrangement.
• The crystal structure was analyzed to identify the coordination environment of the nickel(II) ion.
• Intermolecular interactions such as hydrogen bonds and pi-pi stacking were characterized.

Main Results:

• The nickel(II) atom is coordinated to six water molecules, forming an octahedral [Ni(H2O)6]2+ complex, and resides on an inversion center.
• The crystal structure comprises [Ni(H2O)6]2+ cations, C17H13O7S- anions, and lattice water molecules.
• Extensive hydrogen bonding networks and pi-pi stacking interactions between isoflavone units were observed.
• These interactions collectively assemble the components into an intricate three-dimensional framework.

Conclusions:

• The crystal structure of [Ni(H2O)6](C17H13O7S)2·8H2O has been successfully determined.
• Hydrogen bonding, pi-pi stacking, and electrostatic interactions are fundamental in organizing the crystal structure.
• The findings contribute to the understanding of supramolecular assembly in metal-organic compounds.