A Tetramethylplatinum(IV) Complex with 1,1 '-Bis(diphenylphosphanyl)ferrocene Ligands: Reaction with Trifluoroacetic Acid
Shahsavari HR, Rashidi M, Nabavizadeh SM, Habibzadeh S, Heinemann FW (2009)
Publication Status: Published
Publication Type: Journal article
Publication year: 2009
Journal
Publisher: WILEY-V C H VERLAG GMBH
Pages Range: 3814-3820
Journal Issue: 25
Abstract
A new tetramethylplatinum(IV) complex [PtMe4(dppf)] [2; dppf = 1,1'-bis(diphenylphosphanyl)ferrocene], as the first platinum(IV) complex to contain a chelating dppf ligand, was prepared by the reaction of the known dimeric tetramethylplatinum(IV) complex cis, cis-[Me4Pt(mu-SMe2)(2)PtMe4] (1) with the biphosphane ligand dppf (2 equiv.) at room temperature by replacement of the SMe2 ligands with the P ligating atoms of dppf. The single-crystal X-ray structure of complex 2 revealed that the dppf chelating ligand is arranged close to the "synperiplanar-eclipsed" conformation, with a Cp(centroid)center dot center dot center dot Fe center dot center dot center dot Cp(centroid) twist angle of 17.6 degrees and a dppf bite angle, P1-Pt1-P2, of 95.77(3)degrees. This is in contrast to the usually pref erred "synclinal-staggered" conformation, in which the Cp(centroid)center dot center dot center dot Fe center dot center dot center dot Cp(centroid) twist angle is close to 36 degrees as found in Pt-II complexes with chelating dppf ligands, like for example [PtMe2(dppf)] exhibiting a dppf bite angle close to 100 degrees. When complex 2 was treated with the strong acid CF3COOH (1 equiv.) first evolution of methane was observed, followed by a C-C coupling reaction to give ethane and the methylplatinum(II) complex [PtMe(OCOCF3)(dppf)] (3). The reaction of complex 2 with the nucleophile HgCl2 (1 equiv.) similarly gave MeHgCl, ethane, and the methylplatinum(II) complex [PtMeCl(dppf)] (11). The structure of complex 3 was also determined by X-ray crystallography. The geometry around the platinum center is best described as distorted square-planar and the dppf is arranged in the usually preferred "synclinal-staggered" conformation. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
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Iran, Islamic Republic of (IR)How to cite
APA:
Shahsavari, H.R., Rashidi, M., Nabavizadeh, S.M., Habibzadeh, S., & Heinemann, F.W. (2009). A Tetramethylplatinum(IV) Complex with 1,1 '-Bis(diphenylphosphanyl)ferrocene Ligands: Reaction with Trifluoroacetic Acid. European Journal of Inorganic Chemistry, 25, 3814-3820. https://doi.org/10.1002/ejic.200900454
MLA:
Shahsavari, Hamid R., et al. "A Tetramethylplatinum(IV) Complex with 1,1 '-Bis(diphenylphosphanyl)ferrocene Ligands: Reaction with Trifluoroacetic Acid." European Journal of Inorganic Chemistry 25 (2009): 3814-3820.
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