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Fe Mössbauer spectroscopic studies on M(CO)5(azaferrocene) complexes (M = Cr, Mo, W). The crystal structures of W(CO)5(azaferrocene) and W(CO)5(2,5-dimethylazaferrocene) |
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| Authors: | Jack Silver, Janusz Zakrzewski, Anita Tosik,Maria Bukowska-Strzy ewska |
| Affiliation: | aSchool of Chemical and Life Sciences, University of Greenwich, Wellington St., London SE18 6PF, UK bDepartment of Organic Chemistry, University of Łódź, 90-136 Łódź, Narutowicza 68, Poland cInstitute of General and Ecological Chemistry, Technical University of Łódź, 90-924 Łódź, Żwirki 36, Poland |
| Abstract: | 57Fe Mössbauer spectroscopic studies on M(CO)5(azaferrocene) complexes (M = Cr, Mo, W) as well as the crystal structures of W(CO)5(azaferrocene) and W(CO)5(2,5-dimethylazaferrocene) are reported. The complexation of azaferrocene to the M(CO)5 moiety brings about only a small change in the quadrupole splitting. The structures of both tungsten complexes reveal a significant shortening of the W-C bonds trans to the nitrogen. These data indicate that azaferrocene behaves as a relatively strong σ-donor and there is no evidence for any π-acceptor properties. |
| Keywords: | Crystal structure Azaferrocene |
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