Strong agostic-type interactions in ruthenium benzylidene complexes containing 7-azaindole based scorpionate ligands |
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| Authors: | Tsoureas Nikolaos Nunn Joshua Bevis Thomas Haddow Mairi F Hamilton Alex Owen Gareth R |
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| Institution: | The School of Chemistry, University of Bristol, Cantock's Close, Bristol, UK BS8 1TS. |
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| Abstract: | 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. |
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