Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10572674 | Inorganica Chimica Acta | 2005 | 14 Pages |
Abstract
Anionic Fischer-type aminocarbene complexes, [(CO)5MC(NMe2)CH2]Li (MÂ =Â Cr or W), react with Ph2PCl and [Me2(MeS)S]BF4] - a source of SMe+ - to afford acyclic complexes (CO)5MC(NMe2)CH2X (XÂ =Â PPh2, SMe2) and (CO)5MC(NMe2)CHX2 XÂ =Â SMe), the chelates and , and the bridged compounds (CO)5MC(NMe2)CH2XM(CO)5 (XÂ =Â PPh2, SMe). Cyclisation occurs much faster for Cr than for W. Crystal structures illustrate the bonding behaviour in the new complexes and especially characterise carbene-phosphine and carbene-thioether four-membered chelates for the first time. The sulfur-donor in the tetracarbonyl complexes , and shows an exceptionally weak trans influence.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Inorganic Chemistry
Authors
Stephanie Cronje, Gerrit R. Julius, Elzet Stander, Catharine Esterhuysen, Helgard G. Raubenheimer,