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From Infinite Tubular Arrays to Discrete Molecules and Back: An Example of Reversible Ring-opening Polymerization in Silver(I)–diphosphazane Chemistry

Krishna, Heera and Krishnamurthy, Setharampattu S (2007) From Infinite Tubular Arrays to Discrete Molecules and Back: An Example of Reversible Ring-opening Polymerization in Silver(I)–diphosphazane Chemistry. In: Inorganica Chimica Acta, 360 (10). pp. 3462-3466.

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Abstract

The reaction of AgX with the diphosphazane ligand, $Pr^iN(PPh_2)_2$ (L) gives the polymeric complexes, $[Ag_2(\mu-X)_2(\mu-L)]_n$ $(X = NO_3 \hspace{2mm} 1a \hspace{2mm} or \hspace{2mm} OSO_2CF_3 \hspace{2mm} 1b)$. Single crystal X-ray analysis of 1a reveals a novel structural motif formed by interlinking of giant 40-membered rings; the diphosphazane ligand L adopts a unique $‘C_s’$ geometry. These polymeric complexes exhibit a completely reversible ring-opening polymerization– depolymerization relationship with the dinuclear and mononuclear complexes, $[\{Ag(\mu-L)(X)\}_2] (X=NO_3 \hspace{2mm} 2a, X = OSO_2CF_3 2b)$ and $[Ag(k^2-L)_2\]X (X = NO_3 \hspace{2mm}3a, X = OSO_2CF_3 3b)$.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Phosphorus(III) ligands;Silver(I) complexes;Ring-opening polymerization;NMR spectroscopy;X-ray crystallography
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 19 Sep 2007
Last Modified: 19 Sep 2010 04:39
URI: http://eprints.iisc.ernet.in/id/eprint/11837

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