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Dimorpholinium tetra-chlorido-cobaltate(II).

Xing-Xing Cao¹, He-Long Cheng, Qing-Liu Feng

¹School of Biology and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online

|September 13, 2012

Summary

This study characterizes the molecular salt (morpholinium)2[CoCl4], detailing the chair conformations of morpholinium cations and the distorted tetrahedral geometry of the tetra-chloridocobaltate(II) anion. Hydrogen bonding interactions influence cobalt-chloride bond lengths and crystal structure.

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Area of Science:

Inorganic Chemistry
Crystallography
Structural Chemistry

Background:

Molecular salts offer unique structural and electronic properties.
Cobalt(II) complexes with halide ligands are of interest for their coordination chemistry.
Hydrogen bonding plays a crucial role in crystal engineering and molecular assembly.

Purpose of the Study:

To elucidate the crystal structure and bonding characteristics of the molecular salt (C4H10NO)2[CoCl4].
To investigate the conformational preferences of the morpholinium cation.
To analyze the coordination geometry of the tetra-chloridocobaltate(II) anion and the role of hydrogen bonding.

Main Methods:

Single-crystal X-ray diffraction was employed to determine the three-dimensional crystal structure.
Analysis of bond lengths, bond angles, and hydrogen bonding networks.
Conformational analysis of the morpholinium cation.

Main Results:

The morpholinium cations adopt chair conformations.
The tetra-chloridocobaltate(II) anion exhibits significant distortion from ideal tetrahedral geometry, with Cl-Co-Cl angles ranging from 102.183(19)° to 117.59(2)°.
Co-Cl bond lengths vary based on hydrogen bond acceptance, with shorter bonds observed for chlorides not involved in hydrogen bonding.
Hydrogen bonds (N-H⋯O, N-H⋯Cl, and bifurcated N-H⋯(O,Cl)) link the components into (100) sheets.

Conclusions:

The crystal structure of (C4H10NO)2[CoCl4] is characterized by specific cation conformations and anion distortions.
Hydrogen bonding interactions are key determinants of the structural organization and influence the electronic environment around the cobalt center.
The study provides insights into the interplay between ionic components and hydrogen bonding in the formation of layered crystal structures.