Dataset Information


Isomerization Reactions in Anionic Mesoionic Carbene-Borates and Control of Properties and Reactivities in the Resulting CoII ?Complexes through Agostic Interactions.

ABSTRACT: We present herein anionic borate-based bi-mesoionic carbene compounds of the 1,2,3-triazol-4-ylidene type that undergo C-N isomerization reactions. The isomerized compounds are excellent ligands for CoII ?centers. Strong agostic interactions with the "C-H"-groups of the cyclohexyl substituents result in an unusual low-spin square planar CoII ?complex, which is unreactive towards external substrates. Such agostic interactions are absent in the complex with phenyl substituents on the borate backbone. This complex displays a high-spin tetrahedral CoII ?center, which is reactive towards external substrates including dioxygen. To the best of our knowledge, this is also the first investigation of agostic interactions through single-crystal EPR spectroscopy. We conclusively show here that the structure and properties of these CoII complexes can be strongly influenced through interactions in the secondary coordination sphere. Additionally, we unravel a unique ligand rearrangement for these classes of anionic mesoionic carbene-based ligands.

PROVIDER: S-EPMC7839553 | BioStudies |

REPOSITORIES: biostudies

Similar Datasets

| S-EPMC2979213 | BioStudies
| S-EPMC8456875 | BioStudies
| S-EPMC8506647 | BioStudies
2011-01-01 | S-EPMC3151874 | BioStudies
| S-EPMC4734353 | BioStudies
| S-EPMC6100101 | BioStudies
| S-EPMC8111538 | BioStudies
| S-EPMC4685890 | BioStudies
| S-EPMC8635179 | BioStudies
| S-EPMC7154526 | BioStudies