Supramolecular chirality in the crystals of mononuclear and polymeric cobalt( ii ) complexes with enantiopure and racemic N -thiophosphorylated thioureas

Mononuclear and polymeric Co( ii ) complexes were obtained with enantiopure and racemic N -thiophosphorylated thioureas with a metal to ligand ratio of 1 : 2. To control the stereochemistry of the complexes synthesized from racemic ligands, pyridine and pyrazine were used as co-ligands, the latter b...

Full description

Saved in:
Bibliographic Details
Published in:CrystEngComm 2021-03, Vol.23 (10), p.2081-2090
Main Authors: Kataeva, Olga, Metlushka, Kirill, Ivshin, Kamil, Yamaleeva, Zilya, Zinnatullin, Ruzal, Nikitina, Kristina, Badeeva, Elena, Khrizanforova, Vera, Budnikova, Yulia, Naumann, Marco, Wellm, Christoph, Alfonsov, Alexey, Kataev, Vladislav, Büchner, Bernd, Knupfer, Martin
Format: Article
Language:English
Subjects:
Chirality
Cobalt
Cobalt compounds
Coordination compounds
Coordination polymers
Crystallography
Crystals
Electrochemistry
Galling
Infrared spectroscopy
Ligands
Magnetic properties
Oxidation
Single crystals
Stereochemistry
Thioureas
Valence
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Mononuclear and polymeric Co( ii ) complexes were obtained with enantiopure and racemic N -thiophosphorylated thioureas with a metal to ligand ratio of 1 : 2. To control the stereochemistry of the complexes synthesized from racemic ligands, pyridine and pyrazine were used as co-ligands, the latter bridging cobalt ions in 1D-coordination polymers. Single crystal X-ray diffraction shows that 1D and 2D supramolecular homochiral arrangements in racemic crystals of mononuclear complexes are transferred to their polymeric counterparts. The cobalt oxidation state in coordination polymers was proved by electrochemistry. Magnetization and ESR measurements reveal a typical magnetic behavior of Co( ii ) metal ions in a distorted octahedral coordination. The polymeric crystals start to lose crystallinity from the surface at 65 °C, the process being accompanied with a color change and the evolution of gas. The ESR spectrum reduces in intensity after sample heating, tentatively, due to the smearing of the ESR response from the amorphous part of the sample.
ISSN:1466-8033
1466-8033
DOI:10.1039/D0CE01871F