Synthesis and Structure of Group 4 Iminophosphonamide Complexes
作者:Rainer Vollmerhaus、Robert Tomaszewski、Pengcheng Shao、Nicholas J. Taylor、Kevin J. Wiacek、Stewart P. Lewis、Abdulaziz Al-Humydi、Scott Collins
DOI:10.1021/om0492350
日期:2005.2.1
iminophosphonamide (PN2) ligands (2a−f), the corresponding hydrochloride salts (1a−c), and a number of bis(PN2) dichloride complexes of group4 (3a−e) and their corresponding dialkyls (5a−e) are described. A novel monosubstituted PN2 “ate” complex 4 was prepared from ligand 2f and Zr(NMe2)4 on treatment with excess Me2NH·HCl. Piano-stool PN2 zirconium dichloride complexes 6a−h were accessible on treatment of CpZr(NMe2)3
The present invention relates to the use of complexes of transition metals having a ligand containing a phosphorus or arsenic atom bound to the transition metal through an oxygen atom, or an amido radical. The complexes may be activated with conventional activators and are useful in solution, slurry and gas phase polymerization of olefins.
PREPARATION AND NMR-DATA OF SOME NEW PHOSPHONIUM BROMIDES [R<sub>2</sub>P(NHR')<sub>2</sub>]Br AND OF IMINOPHOSPHINIC ACID AMIDES R<sub>2</sub>P(NR')(NHR')
作者:Martin Düppmann、Wilhelm Kuchen、Wilfried Peters
DOI:10.1080/10426509708031579
日期:1997.10.1
The synthesis and the (31)p-,H- 1-, C-13- and Si-29-NMR spectra of some new Di(organylamino)-diorganylphosphonium bromides [R2P(NHR')(2)]Br 1 (R = Pr-1, Ph; R' = Me, Et, Pr-1) and of Iminophosphonic acid amides R2P(NR')(NHR') (R = Et, Bu-t, Ph; R' = SiMe3,) 2 are reported. 1 and 2 can be converted into the Li-salts of ligands R2P(NR')(2)(-) that are potential chelate ligands in metal complexes.