Carbon- and Sulfur-Bridged Diiron Carbonyl Complexes Containing N,C,S-Tridentate Ligands Derived from Functionalized Dibenzothiophenes: Mimics of the [FeFe]-Hydrogenase Active Site

Autor:	Masakazu Hirotsu, Kiyokazu Santo, Isamu Kinoshita, Hideki Hashimoto
Rok vydání:	2012
Předmět:	Schiff base biology Ligand Aryl Organic Chemistry Active site Oxazoline Metallacycle Photochemistry Medicinal chemistry Inorganic Chemistry chemistry.chemical_compound chemistry Dibenzothiophene biology.protein Physical and Theoretical Chemistry Bond cleavage
Zdroj:	Organometallics. 31:7548-7557
ISSN:	1520-6041 0276-7333
DOI:	10.1021/om300826y
Popis:	Photochemical reactions of [Fe(CO)5] with dibenzothiophene (DBT) derivatives bearing a N-donor group produced a series of C,S-bridged diiron carbonyl complexes [{Fe(μ-L′-κ3N,C,S)(CO)2}Fe(CO)3], as previously reported for 4-(2′-pyridyl)dibenzothiophene (L1), where L′ represents the N,C,S-tridentate ligands L1′–L5′, formed by C–S bond cleavage of L1–L5, respectively. The DBT derivatives used in this study have Schiff base or oxazoline moieties at the 4-position: L2 = PhCH2N═CH-DBT, L3 = 2-MeOC6H4CH2N═CH-DBT, L4 = (S)-PhC(Me)HN═CH-DBT, L5 = (R)-4-isopropyl-2-oxazolinyl-DBT. The diiron complexes were characterized by NMR, absorption, and circular dichroism spectroscopy, and the dinuclear structures bridged by thiolate S and aryl C atoms were established by X-ray crystallography. The diiron complex [{Fe(μ-L′-κ3N,C,S)(CO)2}Fe(CO)3] consists of two units, Fe(L′)(CO)2 and Fe(CO)3: the latter unit is located on a thiolate-containing metallacycle in the former one. The chiral Schiff base ligand precursor L4 gave a ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::97e7fc7a2c53763bf2cee06a4981c620 https://doi.org/10.1021/om300826y Zobrazit plný text záznamu