Issue 47, 2006
From the journal:

Dalton Transactions

Synthesis and coordination chemistry of an alkyne functionalised bis(pyrazolyl)methaneligand

Fabian Mohr,*a   Elena Cerradab  and  Mariano Lagunab  

* Corresponding authors

a Fachbereich C, Anorganische Chemie, Bergische Universität Wuppertal, Wuppertal, Germany
E-mail: fmohr@uni-wuppertal.de
Fax: 49 202 439 3053
Tel: 49 202 439 3641

b Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., Zaragoza, Spain

Abstract

The alkyne functionalised bidentate N-donor ligand (2-propargyloxyphenyl)bis(pyrazolyl)methane (L) was prepared in high yield from the reaction of (2-hydroxyphenyl)bis(pyrazolyl)methane with propargyl bromide in the presence of base. A series of transition-metal complexes including [MCl2L] (M = Cu, Co, Ni, Zn, Pt), [ML2](NO3)2 (M = Cu, Co, Ni, Zn), [AgL]NO3 and [Pd(L)(dppe)](OTf)2 were prepared and characterised by spectroscopic techniques. In addition, ligand L as well as the Co(II) and Zn(II) complexes [CoCl2L]2, [ZnCl2L] were structurally characterized by single-crystal X-ray diffraction. The organometallic gold(I) and platinum(II) acetylide complexes [Pz2CH(C6H4-2-OCH2C[triple bond, length as m-dash]CAuPPh3)] and trans-[{Pz2CHC6H4-2-OCH2C[triple bond, length as m-dash]C}2Pt(PPh3)2] were prepared from L and [AuCl(PPh3)] and trans-[PtCl2(PPh3)2], respectively. Treatment of these complexes with [Pd(OTf)2(dppe)] or [Cu(MeCN)4]PF6 results in formation of the cationic, mixed-metal complexes, which were isolated (Pt/Pd, Au/Pt) or detected by electrospray mass spectrometry (Au/Cu, Pt/Cu).

Graphical abstract: Synthesis and coordination chemistry of an alkyne functionalised bis(pyrazolyl)methane ligand

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Article information

DOI
https://doi.org/10.1039/B613311H
Article type
Paper
Submitted
13 Sep 2006
Accepted
16 Oct 2006
First published
24 Oct 2006

Dalton Trans., 2006, 5567-5573

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Synthesis and coordination chemistry of an alkyne functionalised bis(pyrazolyl)methane ligand

F. Mohr, E. Cerrada and M. Laguna, Dalton Trans., 2006, 5567 DOI: 10.1039/B613311H

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