Reaction of Bis(pyrazol-1-yl)methanes Modified by Organotin Groups on the Methine Carbon with W(CO)<sub>5</sub>THF to Give Novel Heterodinuclear Organometallic Complexes
作者:Liang-Fu Tang、Shu-Bin Zhao、Wen-Li Jia、Zhi Yang、Da-Tong Song、Ji-Tao Wang
DOI:10.1021/om030221o
日期:2003.8.1
can also result in the oxidative addition of the tin−carbon(sp3) bond to the tungsten(0) center, implying that the oxidative addition reaction of the tin−carbon(sp3) bond may form these decarbonylation intermediates. While the reactions of trialkylstannylbis(pyrazol-1-yl)methanes, R3SnCHPz2 (R = Et or iPr), with W(CO)5THF yield only the decarbonylation heterodinuclear complexes R3SnCHPz2W(CO)4, in which
通过使双(吡唑-1-基)甲基锂与有机锡卤化物反应,合成了在次甲基碳上具有有机锡基团的一系列新的双(吡唑-1-基)甲烷。已经详细研究了它们与W(CO)5 THF的反应,表明这些新的配体在用W(CO)5 THF处理后显示出多种反应活性,这取决于锡原子上取代基的性质。用W(CO)5 THF处理三芳基锡烷基双(吡唑-1-基)甲烷Ar 3 SnCHPz 2(Ar =苯基或对甲苯基; Pz =取代的吡唑)导致氧化锡碳(sp 3)结合到钨(0)中心以产生新型金属-金属键合配合物CHPz 2(CO)3 W-SnAr 3,其中发现了四元金属环,而双(吡唑-1-基)甲基化物起三齿态的作用单阴离子κ 3 - [N,C,N]螯合配体。当在吡唑环的4-位上存在烷基取代基时,可以分离出一些脱羰基中间体Ar 3 SnCHPz 2 W(CO)4。顺序地加热这些中间体也可以导致氧化加成的锡-碳(SP的3)键合到钨(0)中心,这意味着锡-碳的氧化加成反应(SP