scholarly journals Highly Selective Hydrogenation of Carbon-Carbon Multiple Bonds Catalyzed by the Cation [(C6Me6)2Ru2(PPh2)H2]+: Molecular Structure of [(C6Me6)2Ru2(PPh2)(CHCHPh)H]+, a Possible Intermediate in the Case of Phenylacetylene Hydrogenation

2006 ◽  
Vol 13 (1) ◽  
pp. 292-299 ◽  
Author(s):  
Mathieu J.-L. Tschan ◽  
Georg Süss-Fink ◽  
Frédéric Chérioux ◽  
Bruno Therrien

The heteronuclear platinum clusters Pt 2 CO 2 (CO) 8 (PPh 3 ) 2 and Pt(C 6 H 11 NC) 2 [Mo(CO) 3 (n 5 -C 5 H 5 )] 2 are poor catalysts for the hydrogenation of olefins and internal acetylenes, but they show a reasonable activity for the hydrogenation of terminal acetylenes. In this latter case the selectivity towards olefins is low. Whereas the PtMo 2 cluster can be recovered unaltered from the reaction mixture, the Pt 2 CO 2 cluster undergoes rather complex molecular rearrangements, which take place under the catalytic conditions. Finally the Pt 2 CO 2 cluster, under well defined conditions, may act as a catalyst for the selective hydrogenation of diphenylacetylene to cis -stilbene.


2011 ◽  
Vol 47 (42) ◽  
pp. 11653 ◽  
Author(s):  
Linsey S. Bennie ◽  
Calum J. Fraser ◽  
Stephanie Irvine ◽  
William J. Kerr ◽  
Shalini Andersson ◽  
...  

1991 ◽  
Vol 46 (6) ◽  
pp. 747-752 ◽  
Author(s):  
Wolfgang A. Herrmann ◽  
Dieter W. Marz ◽  
Eberhardt Herdtweck

Reaction of (N-trimethylsilyl)-α-aminopicolin with the rhenium(V) oxohalogenide (η5-C5Me5)ReOCl2 (Me = CH3) exemplifies a simple, clean synthesis of imido-metallosiloxanes, compounds of the structure R3SiO—M=N—R′. The compound (η5-C5Me5)ReCl[OSi(CH3)3](NCH2-2-C5H4N) thus formed under HCl elimination has a square-pyramidal molecular structure (single crystal X-ray diffraction).


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