Strong agostic-type interactions in ruthenium benzylidene complexes containing 7-azaindole based scorpionate ligands

The complexes [Ru(Tai)Cl{=C(H)Ph}(PCy(3))] (4) and [Ru((Ph)Bai)Cl{=C(H)Ph}(PCy(3))] (5) [where Tai = HB(7-azaindolyl)(3) and (Ph)Bai = Ph(H)B(7-azaindolyl)(2)] have been prepared and structurally characterised. The borohydride unit is located in the coordination site trans to the chloride ligand in...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2011-01, Vol.40 (4), p.951-958
Main Authors: Tsoureas, Nikolaos, Nunn, Joshua, Bevis, Thomas, Haddow, Mairi F, Hamilton, Alex, Owen, Gareth R
Format: Article
Language:English
Subjects:
Borohydrides
Chlorides
Dehydrogenation
Forming
Hydrogen storage
Ligands
Prints
Ruthenium
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Summary:The complexes [Ru(Tai)Cl{=C(H)Ph}(PCy(3))] (4) and [Ru((Ph)Bai)Cl{=C(H)Ph}(PCy(3))] (5) [where Tai = HB(7-azaindolyl)(3) and (Ph)Bai = Ph(H)B(7-azaindolyl)(2)] have been prepared and structurally characterised. The borohydride unit is located in the coordination site trans to the chloride ligand in both complexes. The degree of interaction between the borohydride group and the metal centre was found to be significantly large in both cases. Thermolysis reactions involving complex 4 led to a dehydrogenation reaction forming [Ru(Tai)Cl{PCy(2)(η(2)-C(6)H(9))}] (6) where the benzylidene group acts as a hydrogen acceptor.
ISSN:1477-9226
1477-9234
DOI:10.1039/c0dt01148g