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Article: New findings reported from University of Zurich describe advances in metals.
- Article from:
- Journal of Technology
- Article date:
- September 15, 2009
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According to recent research from Zurich, Switzerland, "Five-coordinate rhenium(I) hydride complexes of the type [Re(Br)(H)(NO)(PR3)(2)] (R = Cy 1a, iPr 1b) were reacted with terminal alkynes (RC)-C-1 CH (R-1 = Ph, SiEt3, H), yielding 18-electron eta(2)-alkyne adducts [Re(Br)(H)(NO)(PR3)(2)(eta(2)-HC CR1)] (R-1 =Ph (R = Cy 2a, iPr 2b), SiEt3 (R = Cy 4a, iPr 4b), H (R = Cy 6a, iPr 6b)). Alkyne insertion into the Re-H bond led to the formation of rhenium(I) eta(1)-vinyl derivatives [Re(Br)((E)-CH=CHR1)(NO)(PR3)(2)] (R-1 = Ph (R= Cy 3a, iPr 3b), SiEt3 (R=Cy 5a, iPr 5b), H (R = Cy 7a, iPr 7b)) in good yields."
"The rate of formation of the vinyl complexes depends ...
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