Amino‐phosphanes in Rh
<sup>I</sup>
‐Catalyzed Hydroformylation: Hemilabile Behavior of P,N Ligands under High CO Pressure and Catalytic Properties
作者:Jacques Andrieu、Jean‐Michel Camus、Philippe Richard、Rinaldo Poli、Luca Gonsalvi、Francesco Vizza、Maurizio Peruzzini
DOI:10.1002/ejic.200500432
日期:2006.1
the number of backbone carbon atoms linking P and N decreases from 3 to 1. IR and 31P HPNMR studies in solution show that all P,N ligands adopt exclusively a κ1-P coordination mode in rhodium chloride carbonyl complexes under high CO pressure. In the solid state a κ1-P-α-amino-phosphane coordination has been ascertained by X-ray methods in trans-[RhCl(CO)(γ-P,N-1)2]. In contrast, an equilibrium between
含有 α-、β- 或 γ-氨基磷烷配体 Ph2PCH2NEt2 (α-P,N-1)、Ph2PCH(Ar)NHPh [α-P,N-2; Ar = η6(o-C6H4Cl)Cr(CO)3], Ph2PCH2NPh2 (α-P,N-3), Ph2PCH2CH(Ph)NHPh (β-P,N), Ph2PCH2(o-C6H4–NMe2) (γ- P,N-1)、Ph2PCH(o-C6H4–CH2NHPh) (γ-P,N-2) 和 α,β-二氨基磷烷配体 Et2NCH2P(Ph)CH2CH(Ph)NHPh (α,β-N ,P,N), 在苯乙烯加氢甲酰化中进行了研究。结果表明,当连接 P 和 N 的骨架碳原子数从 3 减少到 1 时,活性增加。 溶液中的 IR 和 31P HPNMR 研究表明,所有 P,N 配体在氯化铑羰基中仅采用 κ1-P 配位模式在高 CO 压力下形成复合物。在固态中,κ1-P-α-氨基-磷烷配位已通过