P —H-funktionelle Zirkonocen-Phosphido-Komplexe und Struktur eines Diazoalkan-Insertionsprodukts

Fachbereich Chemie der Universität Marburg, Hans-Meerwein-Straße, D-3550 Marburg/Lahn Z. Naturforsch. 44b, 1538—1544 (1989); eingegangen am 15. Juni 1989 Mesitylphosphido Ligand, Zirconocene(IV) Phosphido Complexes, Diphenyldiazomethane Insertion, Phosphinohydrazonido(l-) Ligand The reaction of Cp2ZrCl2 with [Li(THF)2PHMes]„ (1) Mes = 2,4,6-Me3C ftH 2) at -7 8 °C yields Cp2Zr(PH M es)(X ), with X = CI (2) (1:1 reaction), X = PHMes (3) (1:2 reaction). Although 2 and 3 could not be obtained in a pure state, NMR spectroscopic investigations confirm the proposed formulae. 2 reacts with diphenyldiazomethane at ambient tem perature with insertion of the N2CPh2 molecule into the Z r—P bond and formation of Cp2Zr{N(CPh2)N(PHMes)}(Cl) (4). An X-ray structure determination of 4 shows the ^-bonding mode of the phosphinohydrazonido(l —) ligand to the Z r atom (Z r—N (l) 2.181(6) Ä; Z r—N(2) 2.205(6) Ä). Crystal data: space group P2 jn , Z = 4, (2581 observed independent reflexions, R = 0.063). Cell dimensions (19 °C): a = 11.820(2), b = 18.361(2), c 13.758(2) Ä, ß = 103.86(2)°.