A survey of pendant donor-functionalised (N,O) phosphine ligands for Cr-catalysed ethylene tri- and tetramerisation
作者:James A. Suttil、Peter Wasserscheid、David S. McGuinness、Michael G. Gardiner、Stephen J. Evans
DOI:10.1039/c4cy00457d
日期:——
Selected phosphine-based ligands plus chromium have been found to be promising candidates for MAO-free trimerisation and tetramerisation of ethylene.
选择的磷基配体与铬已被发现是MAO无催化三聚和四聚乙烯的有前途的候选物。
The Intramolecular Rearrangement of Phosphinohydrazides [R′<sub>2</sub>P–NR–NR–M] → [RN═PR′<sub>2</sub>–NR–M]: General Rules and Exceptions. Transformations of Bulky Phosphinohydrazines (R–NH–N(PPh<sub>2</sub>)<sub>2</sub>, R = <i>t</i>Bu, Ph<sub>2</sub>P)
作者:Alexander N. Kornev、Vyacheslav V. Sushev、Yulia S. Panova、Natalia V. Belina、Olga V. Lukoyanova、Georgy K. Fukin、Sergey Y. Ketkov、Gleb A. Abakumov、Peter Lönnecke、Evamarie Hey-Hawkins
DOI:10.1021/ic201617p
日期:2012.1.16
Complicated redox reaction of 1 with Co[N(SiMe3)2]2 proceeds with cleavage of the P–N and N–N bonds to form a binuclear cobalt complex [CoHN(PPh2)2-κ2P,P′}2(μ-PPh2)]2 (2) demonstrating a short Co···Co distance of 2.3857(5) Å, which implies a formal double bond between the Co atoms. Strong nucleophiles (nBuLi, MeLi) cause fragmentation of the molecules 1 and 3, while reactions of 3 with lithium and lanthanum