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Palladium(II) and platinum(II) derivatives with N,O ligands

Minghetti, Giovanni and Stoccoro, Sergio and Cinellu, Maria Agostina and Zucca, Antonio and Manassero, Mario and Sansoni, Mirella (1998) Palladium(II) and platinum(II) derivatives with N,O ligands. Journal of the Chemical Society. Dalton Transactions, Vol. 1998 (24), p. 4119-4126. ISSN 0300-9246. Article.

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DOI: 10.1039/A805842c

Abstract

The preparation of a series of Pd(II) and Pt(II) derivatives with three N,O hybrid ligands 1-(2-pyridyl)ethyldiphenylphosphine oxide, L1; (2-pyridyl)methyldiphenylphosphine oxide, L2 and 2-pyridyldiphenylphosphine oxide, L3 is described. Depending on the ligand to metal molar ratio, either 1∶1 [LMCl2] {[L1PdCl2] 1, [L2PdCl2] 2, [L3PdCl2] 3, [L1PtCl2] 4} or 2∶1 [L2MCl2] {[L12PdCl2] 5, [L22PdCl2] 6, [L12PtCl2] 7} adducts are obtained. In addition, an ionic species [L12Pd][PF6]2 8, has been isolated by treatment of complex 5 with AgPF6. The structures in the solid state of compounds 5b·MeOH·H2O, 6·MeOH and 4·CH2Cl2 have been solved by X-ray diffraction. The structures of trans-[L12PdCl2] 5b (one of the diastereomers of 5) and trans-[L22PdCl2] 6 are rather different, the former being a chiral molecule (R,R enantiomer) with a C2 axis perpendicular to the plane of the metal, the latter, 6, being a centrosymmetric molecule. In both the species the ligand is bonded through the nitrogen atom. In complex [L1PtCl2] 4, the ligand is coordinated through the N and O atoms to form a six-membered ring which adopts a boat-like conformation. The structure reveals a fairly short interaction between one hydrogen atom of the Me group in an axial position and the platinum atom, Pt· · ·H 2.69 Å. Short contacts Pd· · ·H are also observed in the structures of compounds 5b and 6. Some aspects of the reactivity of the new species are discussed.

Item Type:Article
ID Code:5359
Status:Published
Refereed:Yes
Uncontrolled Keywords:Palladium(II) and platinum(II) derivatives, N,O ligands
Subjects:Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Royal Society of Chemistry
ISSN:0300-9246
Deposited On:27 Jan 2011 12:15

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