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Preparation and characterization of palladium(II) and platinum(II) complexes with bis(pyrazolyl)alkanes: crystal and molecular structures of [Pd2(pz)22][BF4]2 and of [PdCl2{(CH3)2C(pz)2}] (pzH = pyrazole), a new example of a Pd H---C agostic

Minghetti, Giovanni and Cinellu, Maria Agostina and Bandini, Anna Laura and Banditelli, Guido and Demartin, Francesco and Manassero, Mario (1986) Preparation and characterization of palladium(II) and platinum(II) complexes with bis(pyrazolyl)alkanes: crystal and molecular structures of [Pd2(pz)22][BF4]2 and of [PdCl2{(CH3)2C(pz)2}] (pzH = pyrazole), a new example of a Pd H---C agostic. Journal of Organometallic Chemistry, Vol. 315 (3), p. 387-399. ISSN 0022-328X. Article.

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DOI: 10.1016/0022-328X(86)80459-4

Abstract

Neutral and cationic complexes of general formulae (L---L)MCl2 (M = Pd, (L---L) = CH2(pz)2 (1); CH2(3,5-Me2pz)2 (2); (CH3)2C(pz)2 (3); M = Pt, (L---L) = CH2(pz)2 (4); CH2(3,5-Me2pz)2 (5) and (L---L)2M]2+ (M = Pd, (L---L) = CH2(pz)2 (6); CH2(3,5-Me2pz)2 (7); (CH3)2C(pz)2 (8); M = Pt, (L---L) = CH2(pz)2 (9); CH2(3,5-Me2pz)2 (10) have been prepared and characterized by IR and 1H NMR spectroscopy. The structures of 3 and 6 have been determined by X-ray diffraction; in both complexes the bis-(pyrazolyl)alkanes act as chelating ligands but the coordination around the palladium atom in the complex 6 is strictly square-planar whereas in 3 it is a slightly distorted towards pyramidal, with a significant Pd H---C agostic interaction. The six-membered rings in both the complexes adopt a boat-type conformations.

Item Type:Article
ID Code:4892
Status:Published
Refereed:Yes
Uncontrolled Keywords:Palladium(II)complexes, platinum(II) complexes, spectroscopy
Subjects:Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Elsevier Science
ISSN:0022-328X
Deposited On:22 Nov 2010 10:11

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