An unexpected entry into the silver(I) chemistry of diphosphazane ligands: crystal and molecular structures of [Ag{Ph2PN(Pri)PPh2}(CF3SO3)]2, [Ag{Ph2PN(Pri)PPh(OC6H3Me2-2,6)}2]PF6, and [Ag3(μ-Cl)2{Ph2PN(R)PPh2}3]PF6 (R = H, Pri)

Krishna, Heera ; Krishnamurthy, Setharampattu S. ; Nethaji, Munirathinam (2006) An unexpected entry into the silver(I) chemistry of diphosphazane ligands: crystal and molecular structures of [Ag{Ph2PN(Pri)PPh2}(CF3SO3)]2, [Ag{Ph2PN(Pri)PPh(OC6H3Me2-2,6)}2]PF6, and [Ag3(μ-Cl)2{Ph2PN(R)PPh2}3]PF6 (R = H, Pri) Polyhedron, 25 (16). pp. 3189-3200. ISSN 0277-5387

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S02775...

Related URL: http://dx.doi.org/10.1016/j.poly.2006.05.017

Abstract

Mononuclear, binuclear and trinuclear silver(I) complexes were obtained unexpectedly while probing the reactivity of diphosphazane ligands of the type X2PN(Pri)PXY towards the ruthenium-based precursor Ru(bipy)2Cl2 · 2H2O, in the presence of a silver salt as a chloride scavenger. Subsequently, the reactions of AgX [X = Cl, NO3 or CF3SO3] with Ph2PN(R)PPh(Y) [R = H, Y = Ph; R = Pri, Y = Ph or OC6H3Me2-2, 6] in a 1:1 or 1:2 molar ratio have been investigated. Mononuclear or binuclear Ag(I) complexes containing either chelating or bridging diphosphazane ligands are obtained. Trinuclear silver(I) complexes are accessible by the treatment of diphosphazane ligands, Ph2PN(R)PPh2 [R = H, Pri] with AgCl using piperidine as the solvent. In the presence of a suitable chloride donor species, the mononuclear and binuclear complexes of Ph2PN(Pri)PPh2 are transformed slowly to the trinuclear complex [Ag3(μ-Cl)2{Ph2PN(Pri)PPh2} 3]X, over a period 20 h. The structures of representative complexes have been confirmed by X-ray crystallography and the salient structural features are discussed.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Phosphorus Ligands; Silver(I) Complexes; NMR Spectroscopy; X-ray Crystallography
ID Code:17768
Deposited On:16 Nov 2010 12:43
Last Modified:08 Jun 2011 06:37

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