ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Chelating and bridging diphosphinoamine (PPh2)(2)N(Pr-i) complexes of copper(I)

Ahuja, R and Nethaji, M and Samuelson, AG (2009) Chelating and bridging diphosphinoamine (PPh2)(2)N(Pr-i) complexes of copper(I). In: Journal of Organometallic Chemistry, 694 (7-8). pp. 1144-1152.

[img] PDF
hfh.pdf - Published Version
Restricted to Registered users only

Download (414kB) | Request a copy
Official URL: http://www.sciencedirect.com/science?_ob=ArticleUR...


The ligand bis(diphenylphosphino) isopropylamine (dppipa) has been shown to be a versatile ligand sporting different coordination modes and geometries dictated by copper(I). Most of the molecular structures were confirmed by X-ray crystallography. It is found in a chelating mode, in a monomeric complex when the ligand to copper ratio is 2:1. A tetrameric complex is formed when low ratios of ligand to metal (1: 2) were used. But with increasing ratios of ligand to metal (1: 1 and 2: 1), a trimer or a dimer was obtained depending on the crystallization conditions. Variable temperature P-31{H-1} NMR spectra of these complexes in solution showed that the Cu-P bond was labile and the highly strained 4-membered structure chelate found in the solid state readily converted to a bridged structures. On the other hand, complexes with the ligand in a bridging mode in the solid state did not form chelated structures in solution. The effect of adding tetra-alkylammonium salts to solutions of various complexes of dppipa were probed by P-31{H-1} NMR and revealed the effect of counter ions on the stability of complexes in solution. (C) 2008 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Publication: Journal of Organometallic Chemistry
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Binding mode; Copper(I); Diphosphinoamine; Nuclearity; Short bite ligand
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 05 Mar 2010 07:25
Last Modified: 19 Sep 2010 05:56
URI: http://eprints.iisc.ac.in/id/eprint/25957

Actions (login required)

View Item View Item