Ruthenium tris(pyrazolyl)borate complexes. Formation and characterization of acetone, dimethylformamide and vinylidene complexes containing N,N-donor co-ligandsстатья
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Дата последнего поиска статьи во внешних источниках: 26 марта 2018 г.
Аннотация:Chloride abstraction from [Ru{HB(pz)(3)}(tmen)Cl] (pz = pyrazolyl, tmen = Me(2)NCH(2)CH(2)NMe(2)) with NaBPh(4) in the solvents acetone and dimethylformamide led to the formation of the respective cationic [Ru{HB(pz)(3)}(tmen)(solv)](+) complexes. In the presence of phenylacetylene, these are easily transformed into the first example of a ruthenium HB(pz)(3) vinylidene complex. Extended-Huckel molecular-orbital calculations have been performed to establish the nature of the bonding involved. From [Ru{HB(pz)(3)}(py)(2)Cl] (py = pyridine) the corresponding vinylidene complex could be prepared in the same way, although the intermediate solvent complexes could not be isolated. Selected crystal structures were determined.