摘要:
Treatment Of (C13H9)((Pr2N)-Pr-i)PC1 with Li2C2B10H10 gave, after neutralization with Me3NHCI, a trivalent phosphorus-bridged compound, (C13H9)((Pr2N)-Pr-i)P(C2B10H11). It was easily converted to a pentavalent phosphorus-bridged ligand, (C13H9)((Pr2N)-Pr-i)P(=0)(C2B10H10) (4), by reacting with excess hydrogen peroxide in toluene. An equimolar reaction of 4 with Zr(NMe2)4 in toluene at room temperature afforded a zirconium amide incorporating a fluorenylide unit, [sigma:sigma(C13H8)((Pr2N)-Pr-i)P(-O)(C2B10H10)]Zr(NMe2)2(THF) (5). Complex 5 was converted to the zirconacarborane [eta(1):eta(5)-(C H-13(9))((Pr2N)-Pr-i)P(=O)(C2B9H10)]Zr(NMe2)2 (6) in refluxing toluene in the presence Of Me2NH. Its titanium analogue, [eta(1):eta(5)-(C H-13(9))((Pr2N)-Pr-i)P(=O)(C2B9H10)]Ti(NMe2)2 (7), was directly prepared from the reaction of 4 with Ti(NMe2)4 in refluxing toluene. Complex 7 reacted with KH in C6D6 to generate the deprotonated product {[eta(1):eta(5)-(C13H8)((Pr2N)-Pr-i)P(=O)(C2B9H10)]Ti(NMe2)2} {(eta(6)-C6D6)2K)} (8). These new complexes were fully characterized by various spectroscopic techniques, elemental analyses, and single-crystal X-ray diffraction studies.