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Seven-coordinate complexes of molybdenum(II) containing a trichlorogermyl ligand: X-ray crystal structure of a novel [Mo(GeCl3) 2(CO) 2(NCEt) 3].
Autorzy
Rok wydania
1999
Czasopismo
Journal of Organometallic Chemistry
Numer woluminu
585
Strony
215-224
DOI
10.1016/s0022-328x(99)00213-2
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The oxidative – addition of GeCl4to [Mo(CO)4(NCMe)2]inCH2Cl2provides a high-yield and fast route to the trichlorogermylcomplex [MoCl(GeCl3)(CO)3(NCMe)2](1). Beside1, other compounds containing a Mo – Ge bond are formed, as was shown byIR and NMR investigation of the reaction mixture. These compounds react further with an excess of propionitrile giving amongothers, a novel, crystallographically characterized [Mo(GeCl3)2(CO)2(NCEt)3](3). Compound3is the first structurally character-ized molybdenum(II) carbonyl complex, containing two trichlorogermyl ligands. Reaction of1or3with an alkyne (PhCCPh,PhCCMe, PhCCH) affords compounds in which CO and:or nitrile ligands were replaced by alkyne ligands. The alkynemolybdenum(II) complexes formed were characterized structurally by IR and NMR spectroscopy. However, the reaction of1withphenylacetylene (PA) leads to the catalytic coupling of alkyne molecules and the formation of cyclotrimers and polymers. Thepossible mechanisms for the formation of molybdenum(II) complexes and their role in the catalytic process are discussed.
Słowa kluczowe
Molybdenum(II), Germanium, Crystal structure, Seven-coordinate, Heterobimetallic complexes, Nitrile complexes, Alkyne complexes, Cyclotrimerization
Adres publiczny
https://doi.org/10.1016/s0022-328x(99)00213-2
Strona internetowa wydawcy
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