Unexpected Alkyne Transfer between Gold and Rhenium Atoms and Its Application to the Synthesis of Alkynyl Rhenium(I) Compounds

The reaction between the rhenium complexes [Re(OTf)(L)(CO)3] (L = bipy, t-Bu2bipy) and the alkynyl gold compounds (PPh4)[Au(C⋮Cpy)2] and (PPh4)[Au(C⋮C−C6H4−C⋮Cpy)2] in a 2:1 molar ratio affords binuclear cationic rhenium(I) derivatives through a previously unreported alkyne transmetalation process i...

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Bibliographic Details
Published in:Organometallics 2004-10, Vol.23 (21), p.5096-5099
Main Authors: Ferrer, Montserrat, Rodríguez, Laura, Rossell, Oriol, Lima, João C, Gómez-Sal, Pilar, Martín, Avelino
Format: Article
Language:English
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Summary:The reaction between the rhenium complexes [Re(OTf)(L)(CO)3] (L = bipy, t-Bu2bipy) and the alkynyl gold compounds (PPh4)[Au(C⋮Cpy)2] and (PPh4)[Au(C⋮C−C6H4−C⋮Cpy)2] in a 2:1 molar ratio affords binuclear cationic rhenium(I) derivatives through a previously unreported alkyne transmetalation process involving the two metals. This reaction can be used for the synthesis of mononuclear rhenium alkynyls by changing the molar ratio between the reagents to 1:1. These new luminescent complexes were characterized spectroscopically. The X-ray structure of the binuclear compound [{Re(bipy)(CO)3}2(μ-C⋮Cpy)](OTf) (2) was also determined.
ISSN:0276-7333
1520-6041
DOI:10.1021/om0494869