Metalated 1, 3-Azaphospholes: η1-(1H-1, 3-Benzazaphosphole-P)M(CO)5 and μ2-[(1, 3-Benzazaphospholide-P)(cyclopentadienide)nickel] Complexes

✍ Scribed by Joachim Heinicke; Nidhi Gupta; Shreeyukta Singh; Anushka Surana; Olaf Kühl; Raj K. Bansal; Konstantin Karaghiosoff; Martin Vogt

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: German
• Weight: 135 KB
• Volume: 628
• Category: Article
• ISSN: 0372-7874
• DOI: 10.1002/1521-3749(200213)628:13<2869::aid-zaac2869>3.0.co;2-3

✦ Synopsis

1H-1,3-Benzazaphospholes react with M(CO) 5 (THF) (M ϭ Cr, Mo, W) to give thermally and relatively air stable η 1 -(1H-1,3-Benzazaphosphole-P)M(CO) 5 complexes. The 1 H-and 13 C-NMR-data are in accordance with the preservation of the phosphaaromatic π-system of the ligand. The strong upfield 31 P coordination shift, particularly of the Mo and W complexes, forms a contrast to the downfield-shifts of phosphine-M(CO) 5 complexes and classifies benzazaphospholes as weak donor but efficient acceptor ligands. Nickelocene reacts as organometallic species with metalation of the NH-function. The resulting ambident 1,3-benzazaphospholide anions prefer a µ 2 -coordination of the η 5 -CpNi-

Metallierte 1,3-Azaphosphole: η 1 -(1H-1,3-Benzazaphosphol-P)M(CO) 5 und µ 2 -[(1,3-Benzazaphospholid-P)(cyclopentadienid)nickel] Komplexe

Inhaltsübersicht.

1H-1,3-Benzazaphosphole reagieren mit M(CO) 5 (THF) (M ϭ Cr, Mo, W) zu thermisch und zumindest kurzzeitig luftstabilen η 1 -(1H-1,3-Benzazaphosphol-P)M(CO) 5 -Komplexen. Die 1 H-und 13 C-NMR-Daten sind mit dem Erhalt des phosphaaromatischen π-Systems im Liganden im Einklang.