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Molecules 2018, 23(8), 2054; https://doi.org/10.3390/molecules23082054

Synthesis and Coordination Behavior of a Flexible Bis(phosphinoferrocene) Ligand

Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 2030, 128 40 Prague, Czech Republic
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Academic Editor: Derek J. McPhee
Received: 25 July 2018 / Revised: 11 August 2018 / Accepted: 15 August 2018 / Published: 16 August 2018
(This article belongs to the Special Issue Ferrocene and Ferrocene-Containing Compounds)
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Abstract

A symmetrical flexible bis(phosphinoferrocene) derivative, viz. bis[1′-(diphenylphosphino)ferrocenyl]methane (1), was prepared and studied as a ligand in Pd(II) and Au(I) complexes. The reactions of 1 with [PdCl2(cod)] (cod = cycloocta-1,5-diene) and [Pd(μ-Cl)(LNC)]2 (LNC = [2-(dimethylamino-κN)methyl]phenyl-κC1) produced bis(phosphine) complex trans-[PdCl2(12P,P′)] (4), wherein the ligand spans trans positions in the square-planar coordination sphere of Pd(II) and the tetranuclear, P,P-bridged complex [(μ(P,P′)-1){PdCl(LNC)}2] (5), respectively. In reactions with the Au(I) precursors [AuCl(tht)] and [Au(tht)2][SbF6] (tht = tetrahydrothiophene), ligand 1 gave rise to tetranuclear Au2Fe2 complex [(μ(P,P′)-1)(AuCl)2] (6) and to symmetrical macrocyclic tetramer [Au4(μ(P,P′)-1)4][SbF6]4 (7). All compounds were characterized by spectroscopic methods. In addition, the structures of compound 1, its synthetic precursor bis[1′-(diphenylphosphino)ferrocenyl]methanone (3), and all aforementioned Pd(II) and Au(I) complexes were determined by single-crystal X-ray diffraction analysis (some in solvated form). View Full-Text
Keywords: ferrocene ligands; phosphines; palladium; gold; structure elucidation ferrocene ligands; phosphines; palladium; gold; structure elucidation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Schulz, J.; Leitner, Z.; Císařová, I.; Štěpnička, P. Synthesis and Coordination Behavior of a Flexible Bis(phosphinoferrocene) Ligand. Molecules 2018, 23, 2054.

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