Structure and quantum chemical study of crystalline platinum(II) acetate

Calculations by the hybrid functional PBE0 with scalar relativistic corrections and the QTAIM method revealed the metal-metal bonding in the molecule of platinum(II) acetate Pt4(μ-OAc)8, which stabilizes the molecule by 50 kcal mol−1. © 201

The First Heterometallic Acetate-Bridged Pt(II)–Pd(II) Complex: Synthesis, Structure, and Formation of Bimetallic PtPd 2 Nanoparticles

Abstract: The reaction of platinum acetate blue, empirically described as Pt(OOCMe) 2.50 , with palladium(II) acetate Pd 3 (μ-OOCMe) 6 gave the first heterometallic acetate-bridged platinum(II) and palladium(II) complex Pd 2 Pt(μ-OOCMe) 6 (I) as co-crystallizates 17Pd 2 Pt(μ-OOCMe) 6 ⋅ 4Pd 3 (μ-OOCMe) 6 ⋅ 42C 6 H 6 (IIa) and 17Pd 2 Pt(μ-OOCMe) 6 ⋅ 4 Pd 3 (μ-OOCMe) 6 (IIb). Single crystal X-ray diffraction (CIF files CCDC nos. 1568105 and 1852744), EXAFS, and quantum chemical studies (DFT and QTAIM) of complex I revealed a slightly distorted triangular structure similar to the structure of palladium(II) acetate Pd 3 (μ-OOCMe) 6 and hypothetical platinum(II) complex Pt 3 (μ-OOCMe) 6 . The thermal decomposition of complex IIa gives the bimetallic alloy PtPd 2 . A combined X-ray diffraction and EXAFS study demonstrated that the obtained material consists of core (Pt)–shell (Pd) particles with an average size of ~28 nm and a minor amount of smaller (~5 nm) PdO nanoparticles on the surface. The obtained results are useful for the understanding of the nature and structure of the supported phase of heterogeneous Pt–Pd catalysts. © 2019, Pleiades Publishing, Ltd

Heterometallic Palladium(II)-Indium(III) and -Gallium(III) Acetate-Bridged Complexes: Synthesis, Structure, and Catalytic Performance in Homogeneous Alkyne and Alkene Hydrogenation

The reaction of Pd3(OOCMe)6 with indium(III) and gallium(III) acetates was studied to prepare new PdII-based heterometallic carboxylate complexes with group 13 metals. The heterometallic palladium(II)-indium(III) acetate-bridged complexes Pd(OOCMe)4In(OOCMe) (1) and Pd(OOCMe)4In(OOCMe)·MeCOOH (1a) were synthesized and structurally characterized with X-ray crystallography and extended X-ray absorption fine structure in the solid state and solution. A similar Pd-Ga heterometallic complex formed by the reaction of Pd3(OOCMe)6 with gallium(III) acetate in a dilute acetic acid solution, as evidenced by atmospheric pressure chemical ionization mass and UV-vis spectrometry, was unstable at higher concentrations and in the solid state. Complex 1 catalyzes the liquid-phase-selective phenylacetylene and styrene hydrogenation (1 atm of H2 at 20 °C) in acetic acid, ethyl acetate, and N,N-dimethylformamide solutions, while no Pd metal was formed until alkyne and alkene hydrogenation ceased. © 2018 American Chemical Society

Heterometallic Palladium(II)-Indium(III) and -Gallium(III) Acetate-Bridged Complexes: Synthesis, Structure, and Catalytic Performance in Homogeneous Alkyne and Alkene Hydrogenation

The reaction of Pd3(OOCMe)6 with indium(III) and gallium(III) acetates was studied to prepare new PdII-based heterometallic carboxylate complexes with group 13 metals. The heterometallic palladium(II)-indium(III) acetate-bridged complexes Pd(OOCMe)4In(OOCMe) (1) and Pd(OOCMe)4In(OOCMe)·MeCOOH (1a) were synthesized and structurally characterized with X-ray crystallography and extended X-ray absorption fine structure in the solid state and solution. A similar Pd-Ga heterometallic complex formed by the reaction of Pd3(OOCMe)6 with gallium(III) acetate in a dilute acetic acid solution, as evidenced by atmospheric pressure chemical ionization mass and UV-vis spectrometry, was unstable at higher concentrations and in the solid state. Complex 1 catalyzes the liquid-phase-selective phenylacetylene and styrene hydrogenation (1 atm of H2 at 20 °C) in acetic acid, ethyl acetate, and N,N-dimethylformamide solutions, while no Pd metal was formed until alkyne and alkene hydrogenation ceased. © 2018 American Chemical Society