Biomimetic Catalysis of Catechol Cleavage by O2 in Organic Solvents − Role of Accessibility of O2 to FeIII in 2,11-Diaza[3,3](2,6)pyridinophane-Type Catalysts

✍ Scribed by Nathalie Raffard; Riccardo Carina; A. Jalila Simaan; Joëlle Sainton; Eric Rivière; Luba Tchertanov; Sophie Bourcier; Guy Bouchoux; Michel Delroisse; Frédéric Banse; Jean-Jacques Girerd

• Book ID: 101353956
• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 313 KB
• Volume: 2001
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/1099-0682(200109)2001:9<2249::aid-ejic2249>3.0.co;2-3

✦ Synopsis

Three new complexes, [Fe(LN 4 H 2 )Cl 2 ] + , [Fe(LN 4 H 2 )(Cat)] + , and [Fe(LN 4 H 2 )(DBC)] + , were synthesized by using the tetradentate macrocyclic ligand LN 4 H 2 (where LN 4 H 2 , Cat, and DBC stand for 2 ,11-diaza3,3 pyridinophane, catecholate, and 3,5-di-tert-butylcatecholate, respectively). The structure of [Fe(LN 4 H 2 )Cl 2 ] + was determined by X-ray diffraction. It crystallizes in the monoclinic space group C2/c with a = 9.613(1), b = 11.589(1), c = 14.063(2) A ˚, β=110.20(2)°, V = 1541.9(3) A ˚3, and Z = 4. These complexes were found to catalyze the oxidation of catechol groups using O 2 . This was performed in various organic solvents at 20 °C. The reaction