Heterobimetallische phosphanido-verbrückte Zweikern-Komplexe - Synthese von cis-rac-[(η-C5H4R)2Zr{μ-PH(2,4,6−iPr3C6H2)}2M(CO)4] (RMe,MCr,Mo; RH,MMo) |
| |
Authors: | Uwe Senff Stefan Kurz Evamarie Hey-Hawkins |
| |
Abstract: | Heterobimetallic Phosphanido-bridged Dinuclear Complexes - Syntheses of cis-rac-(η-C5H4R)2Zr{μ-PH(2,4,6-iPr3C6H2)}2M(CO)4] (R?Me, M?Cr, Mo; R?H, M?Mo) The zirconocene bisphosphanido complexes (η-C5H4R)2Zr{PH(2,4,6-iPr3C6H2)}2] (R?Me, H) react with (NBD)M(CO)4] (NBD?norbornadiene, M?Cr, Mo) to give only one diastereomer of the phosphanido-bridged heterobimetallic dinuclear complexes cis-rac-(η-C5H4R)2Zr{μ-PH(2,4,6-iPr3C6H2)}2M(CO)4] R?Me, M?Cr ( 1 ), Mo ( 2 ); R?H, M?Mo ( 3 )]. However, no reaction was observed between (η-C5H5)2Zr{PH(2,4,6-tBu3 C6H2)}2] and Pt(PPh3)4]. 1—3 were characterised spectroscopically. For 1—3 , the presence of the racemic isomer was shown by NMR spectroscopy. No reaction was observed at room temperature for 3 and CS2, (NO)BF4, Me3NO or PH(2,4,6-Me3C6H2)2. With Et2AlH or PhC?CH decomposition of 3 was observed. |
| |
Keywords: | Zirconocene Phosphanido-bridged dinuclear complexes racemic isomer |
|
|