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Issue 41, 2019
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Phosphine-functionalised tris(pyrazolyl)methane ligands and their mono- and heterobimetallic complexes

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Abstract

The synthesis, characterisation and reactivity of new phosphine-functionalised tris(pyrazolyl)methane ligands (TpmPR2, 2a–c, with R = Ph, nBu, iPr) are presented. The reaction of 2a–c with [Rh(CO)2Cl]2 furnished N,P-heterochelate carbonyl complexes (3a–c), which were used to quantify the donor abilities of the ligands via IR spectroscopy. The coordination flexibility was demonstrated by treating representative members of this new ligand class with [CpRu(acn)3][PF6] (acn = acetonitrile), [(tht)AuCl] (tht = tetrahydrothiophene) and [Pd(allyl)Cl]2 providing either a N,N,P-heteroscorpionate complex (4) or the P-coordinated complexes (5,6) without any involvement of the pyrazolyl entities. With 2a and [Pd(cod)Cl2], another P,N-heterochelate complex (7) was obtained, which served as a precursor for a heterobimetallic complex containing palladium and copper (8). Detailed NMR spectroscopic and X-ray crystallographic investigations have been performed on all new complexes.

Graphical abstract: Phosphine-functionalised tris(pyrazolyl)methane ligands and their mono- and heterobimetallic complexes

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Supplementary files

Article information


Submitted
16 May 2019
Accepted
05 Jun 2019
First published
05 Jun 2019

This article is Open Access

Dalton Trans., 2019,48, 15397-15407
Article type
Paper

Phosphine-functionalised tris(pyrazolyl)methane ligands and their mono- and heterobimetallic complexes

H. E. Wagner, S. Hohnstein, M. G. Schußmann, L. A. Steppe and F. Breher, Dalton Trans., 2019, 48, 15397
DOI: 10.1039/C9DT02057H

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