Low-spin to low-spin valence tautomeric transition in cobalt bis-dioxolenes.
Dalton Trans
; 53(9): 4098-4107, 2024 Feb 27.
Article
in En
| MEDLINE
| ID: mdl-38314834
ABSTRACT
Cobalt dioxolenes are a well-known class of switchable coordination compounds showing intramolecular electron transfer, which is always accompanied by a spin state change at the cobalt center. Here, we present the first example of thermally switchable cobalt bis-dioxolenes where intramolecular electron transfer seems to take place, but the spin state change is suppressed. This leads to the detection of thermal transition between a common ls-CoIII(SQË-)(Cat2-) and an extremely rare ls-CoII(SQË-)2 electronic state (hs - high-spin, ls - low-spin, SQË- - benzosemiquinonate(1-) radical and Cat2- - catecholate(2-)). Parallel to the present work, a similar work but on cobalt mono-dioxolenes has just appeared (Chem. Eur. J., 2023, 29, e202300091), suggesting thermal transition between ls-CoIII(Cat2-) and ls-CoII(SQË-) electronic states.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Dalton Trans
Journal subject:
QUIMICA
Year:
2024
Document type:
Article
Affiliation country:
Germany
Country of publication:
United kingdom