Bis{2-[bis-(2-hy-droxy-eth-yl)amino]-acetato}-zinc(II) monohydrate

Area of Science:

• Coordination Chemistry
• Crystal Engineering
• Materials Science

Background:

• Bicine is a zwitterionic biological buffer.
• Zinc(II) complexes are relevant in biological systems and materials science.
• Understanding metal-ligand interactions is crucial for designing functional materials.

Purpose of the Study:

• To elucidate the crystal structure of the zinc bicine complex, [Zn(C6H12NO4)2]·H2O.
• To investigate the coordination environment around the zinc(II) ion.
• To analyze the intermolecular interactions and supramolecular assembly.

Main Methods:

• Single-crystal X-ray diffraction analysis.
• Crystallographic data collection and refinement.
• Analysis of coordination geometry and hydrogen bonding networks.

Main Results:

• The compound crystallizes in the monoclinic space group P21/c.
• The zinc(II) ion exhibits a distorted octahedral coordination geometry.
• Two bicine ligands coordinate to the zinc(II) ion via tertiary amine nitrogen, carboxylate oxygen, and hydroxyl oxygen atoms.
• Intermolecular O-H⋯O and C-H⋯O hydrogen bonds facilitate the formation of a 3D supramolecular network.

Conclusions:

• The crystal structure provides detailed insights into the coordination behavior of bicine with zinc(II).
• The hydrogen bonding interactions are key to the formation of the extended three-dimensional network.
• This structural information can aid in the design of novel coordination compounds and metal-organic frameworks.