Modulation of Characteristics of a Ruthenium‐Coordinated Flavin Analogue That Shows an Unusual Coordination Mode†
This work was partly supported by a Grant‐in Aid (16550057). We thank Dr. Yuichi Shimazaki (IFOC, Kyushu University) for his help with X‐ray crystallography. S.M. appreciates support from the Center of Excellence (21COE) Program “Creation of Integrated EcoChemistry” of Osaka University.
Abstract
Hallo− hallo−! A ruthenium(II) complex (1) with the flavin analogue alloxazine (H2allo) has revealed that the ligand anion (Hallo−) forms a four‐membered chelate ring. This unprecedented coordination mode of Hallo allows it to form hydrogen bonds with a complementary receptor (e.g. 2), allowing the effects of hydrogen bonding on the redox behavior and electronic structure of a ruthenium‐bound Hallo radical to be studied.
