Molybdenum(III) chloride–tetrahydrothiophene (tht) complexes in the catalytic polymerization and cyclotrimerization of alkynes: structures and reactivities of the possible intermediates [MoCl3(tht)2(PhCCR)](R = Me or Et)

Autor:	P. Michael Boorman, Meiping Wang, Masood Parvez
Rok vydání:	1996
Předmět:	chemistry.chemical_classification Molybdenum(III) chloride Alkyne chemistry.chemical_element General Chemistry Polymer Medicinal chemistry Catalysis chemistry.chemical_compound chemistry Polymerization Thioether Molybdenum Organic chemistry Tetrahydrothiophene
Zdroj:	J. Chem. Soc., Dalton Trans.. :4533-4542
ISSN:	1364-5447 0300-9246
DOI:	10.1039/dt9960004533
Popis:	The binuclear complexes [Mo2Cl6(tht)3](both the C2v and Cs isomers, tht = tetrahydrothiophene) have been found to be active catalysts for the selective polymerization and cyclotrimerization of a variety of alkynes. The mononuclear complex [MoCl3(tht)3] shows similar behaviour, leading to the postulate that the active species in all cases is mononuclear. Two unique molybdenum(III) alkyne complexes, [MoCl3(tht)2L](L = PhCCMe or PhCCEt) have been isolated and structurally characterized. The structural parameters for these complexes suggest that the alkynes behave as four-electron donors. These complexes are also catalytically active, and the alkyne L is incorporated into the product cyclotrimers and polymers suggesting they are the first intermediates in the formation of active catalysts from the original thioether complexes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9f4d22517bf70e7b2ef91e7a7f2a4b1e https://doi.org/10.1039/dt9960004533 Zobrazit plný text záznamu