Intramolecular Coupling of Two Cyclopentadienyl Ring Systems of ZirconiumUnprecedented Formation of a Dihydride and Preparation of the [{(MeC5H4)Zr}5(μ5-N)(μ3-NH)4(μ-NH2)4] Cluster in a Two-Phase System
摘要:
Reaction of (ClMe2SiC5H4)(2)ZrCl2 (1) with K (Na) in liquid ammonia/toluene at -78 degreesC gave the ansa-zirconocene dihydride [{HN(SiMe2C5H4)(2)Zr(mu -H)H}(2)] (3). Alternatively, treatment of (MeC5H4)(2)ZrCl2 (2) with K (Na) or NaNH2 in liquid ammonia/toluene produced the zirconium cluster [{(MeC5H4)Zr}(5)(mu (5)-N)-(mu (3)-NH)(4)(mu -NH2)(4)] (4). The reaction of 2 with NaNH2 in THF led also to the formation of 4.