Molybdenum Dithiolene Complexes as Structural Models for the Active Sites of Molybdenum(IV) Sulfide Hydrodesulfurization Catalysts

Autor:	Antonio G. De Crisci, Neilson Nguyen, Alan J. Lough, Ulrich Fekl, Daniel J. Harrison
Rok vydání:	2010
Předmět:	chemistry.chemical_classification Sulfide chemistry.chemical_element Alkyne Heterogeneous catalysis Catalysis Inorganic Chemistry chemistry.chemical_compound chemistry Molybdenum Polymer chemistry Thiophene Organic chemistry Organosulfur compounds Hydrodesulfurization
Zdroj:	European Journal of Inorganic Chemistry. 2010:3577-3585
ISSN:	1099-0682 1434-1948
DOI:	10.1002/ejic.201000269
Popis:	The removal of sulfur (as H2S) from organosulfur species in petroleum feedstocks (hydrodesulfurization, HDS) is carried out on an enormous scale by using heterogeneous catalysts based on MoS2 (usually doped with Co). Partially hydrogenated thiophenes are postulated intermediates in the MoS2catalyzed hydrodesulfurization of thiophene. The present contribution describes new molecular models for the proposed active sites in HDS catalysis. The models are derived from a mixed-ligand (push–pull) molybdenum trisdithiolene {[Mo(tfd)2(bdt)]; tfd = S2C2(CF3)2, bdt = S2C6H4}: selective intraligand alkyne binding converts the bdt group to a labile Mo-chelating benzodithiin, which can be substituted with a variety of weak donor ligands. The complexes [Mo(tfd)2(dht)2] and [Mo(tfd)2(tht)2] (dht = 2,5-dihydrothiophene; tht =
Databáze:	OpenAIRE
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