Premium
Iron(III) Complexes with Cross‐Bridged Cyclams: Synthesis and Use in Alcohol and Water Oxidation Catalysis
Author(s) -
Annunziata Alfonso,
Esposito Roberto,
Gatto Giordano,
Cucciolito Maria Elena,
Tuzi Angela,
Macchioni Alceo,
Ruffo Francesco
Publication year - 2018
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201800451
Subject(s) - chemistry , steric effects , catalysis , alcohol oxidation , aqueous solution , alcohol , metal , medicinal chemistry , oxygen , polymer chemistry , stereochemistry , organic chemistry
A class of iron(III) complexes containing diversely substituted cross‐bridged cyclams ( 1‐R,R′: 1‐Me,Me, 1‐Me,Et, 1‐Et,Et, 1‐Me,Bn, 1‐Bn,Bn ) has been prepared and characterized. ( 1‐R,R′ ) complexes catalyze the oxidation of alcohols to ketones in green conditions, by using tert ‐butylhydroperoxide as the oxidant in aqueous solutions. They also exhibit catalytic activity in water oxidation (WO) to molecular oxygen driven by NaIO 4 , and the results were found to be dependent on the steric hindrance of the R ‐substituents. Best compromise in terms of accessibility and protection of the metal center was obtained with 1‐Me,Et (TOF = 1.4 min –1 and TON = 111).