Bidentate chiral phosphine ligands have received increasingattention because of their important role in the developmentof asymmetric catalytic applications of transition metal complexes.1 The substituents at the two phosphorus atoms play animportant
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Bidentate chiral phosphine ligands have received increasingattention because of their important role in the developmentof asymmetric catalytic applications of transition metal complexes.1 The substituents at the two phosphorus atoms play animportant
Bidentate chiral phosphine ligands have received increasing
attention because of their important role in the development
of asymmetric catalytic applications of transition metal complexes.
1 The substituents at the two phosphorus atoms play an
important role in the steric and electronic properties of the
ligands.2 Their nature determines the relative donor/acceptor
ability of the phosphines.3 Dicarba-closo-dodecaborane(12) is
a particularly interesting substituent or backbone because
of its electron-withdrawing character,electron-delocalizing
ability,and large size.4
Derivatives of bidentate bis-phosphinodicarba-closododecaboranes(
12) can form stable complexes with platinum(
II) and palladium(II) because of their ability to form
five-membered chelate rings.5 Lately,severalmetal complexes
with five-membered chelate rings were reported to exhibit
high catalytic activity.6
Bidentate chiral phosphine ligands have received increasingattention because of their important role in the developmentof asymmetric catalytic applications of transition metal complexes.1 The substituents at the two phosphorus atoms play animportant
双齿手性膦配体日益受到
注意,因为他们在发展的重要作用
对过渡金属配合物的不对称催化应用.
1在两个磷原子取代发挥
重要作用的空间位阻和电子特性
ligands.2他们的性质决定的亲属供/受体
在phosphines.3 Dicarba能力硼- dodecaborane（12）
一个特别有趣的取代或骨干力量,因为
delocalizing其吸电子性质,电子
有能力,有大size.4
二是齿衍生物phosphinodicarba - closododecaboranes（
12）可与铂稳定的复合物（
II）和钯,因为它们有能力形成（二）
五员螯合rings.5最近,severalmetal物
与五元环螯合物据报告,展览
高催化activity.6