Halfsandwich Carbonylmetal Complexes of Vanadium, Chromium, and Manganese Containing Tri(1-cyclohepta-2, 4, 6-trienyl)phosphane, P(C7H7)3

✍ Scribed by Max Herberhold; Andreas Pfeifer; Wolfgang Milius

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: German
• Weight: 168 KB
• Volume: 628
• Category: Article
• ISSN: 0372-7874
• DOI: 10.1002/1521-3749(200213)628:13<2919::aid-zaac2919>3.0.co;2-7

✦ Synopsis

The photo-induced substitution of a CO ligand has been used to prepare the halfsandwich complexes (η 3 -C 3 H 5 )V(CO) 4 [P(C 7 H 7 ) 3 ] (1), (η 5 -C 5 H 5 )V(CO) 3 [P(C 7 H 7 ) 3 ] (2), (η 7 -C 7 H 7 )V(CO) 2 [P(C 7 H 7 ) 3 ] ( 3), (η 6 -C 6 H 3 Me 3 )Cr(CO) 2 [P(C 7 H 7 ) 3 ] (4), and (η 5 -C 5 H 5 )Mn(CO) 2 [P(C 7 H 7 ) 3 ] (7), in which the olefinic phosphane is coordinated as a conventional two-electron ligand through the lone pair of electrons at phosphorus. Some analogues, which are permethylated at the aromatic ring (2*, 4*, 7*), were included for comparison. Subsequent photo-elimination of another CO group from 4 or 7 converts the olefinic phosphane into a chelating four-electron ligand, leading to (η 6 -C 6 H 3 Me 3 )Cr(CO)-[P(C 7 H 7 ) 2 (η 2 -C 7 H 7 )] ( 5) and (η 5 -C 5 H 5 )Mn(CO)[P(C 7 H 7 ) 2 (η 2 -