Immobilization and Characterization of RuCl2(PPh3)3 Mesoporous Silica SBA-3
-
Anna Grünberg
Abstract
The five-fold coordinated ruthenium (II) catalyst RuCl2(PPh3)3 is heterogenized on the surface of amine functionalized mesoporous silica material SBA-3 and studied by BET, XRD and 31P CP-MAS solid-state NMR. The spectra indicate the replacement of one or two of the triphenyl-phosphine groups in the course of the grafting. To distinguish between both possibilities two-dimensional J-resolved 31P MAS solid-state NMR combined with quantum chemical calculations is employed. The changes of the scalar coupling pattern between the neat catalyst and the immobilized catalyst suggest the replacement of two of the PPh3-groups by coordinative bonds to the amine-functions of the linker. DFT calculations reveal the absence of two chemically and magnetically equivalent phosphines and confirm the replacement of two PPh3-groups. This finding is similar to the results observed for the binding of the rhodium in the Wilkinson's catalyst, despite the different coordination of the metals (four-fold versus five-fold), the presence of two chlorine ligands and the different transition metal.
© by Oldenbourg Wissenschaftsverlag, München, Germany
Articles in the same Issue
- Editorial
- Biography of Prof. Dr. Hans-Heinrich Limbach
- Alumni and long term guests of the Limbach group
- NMR and FT-IR Studies on the Association of Derivatives of Thymidine, Adenosine, and 6-N-Methyl-Adenosine in Aprotic Solvents
- Competition between Hydrogen Bonds and Lewis Acid-Base Interactions in the Equilibria between Bis(pentafluorophenyl)borinic Acid and Pyridine: Insights from NMR, Diffractometric and Computational Studies
- Energy Analysis of Competing Non-Covalent Interaction in 1:1 and 1:2 Adducts of Collidine with Benzoic Acids by Means of X-Ray Diffraction
- A TT Dinucleotide with a Nonionic Silyl Backbone: Impact on Conformation and H-Bond Mediated Base Pairing as Studied by Low-Temperature NMR
- Oxygen and Hydrogen Isotopic Preference in Hydration Spheres of Chloride and Sulfate Ions
- Ab Initio Study of Cooperative Effects in Complexes X:HBO:Z, with X, Z=LiH, HNC, HF, HCN, HCl, ClF, and HBO: Structures, Binding Energies, and Spin-Spin Coupling Constants across Intermolecular Bonds
- The Structure and Dynamic Properties of 1H-Pyrazole-4-Carboxylic Acids in the Solid State
- Acridine – a Promising Fluorescence Probe of Non-Covalent Molecular Interactions
- First Example of Hydrogen Bonding to Platinum Hydride
- Interaction of Hydrogen with a Cobalt(0001) Surface
- Immobilization and Characterization of RuCl2(PPh3)3 Mesoporous Silica SBA-3
- Secondary Isotope Effects on 13C and 15N Chemical Shifts of Schiff Bases Revisited
- Analysis of Nutation Patterns in Fourier-Transform NMR of Non-Thermally Polarized Multispin Systems
- The Structure of Supercooled Water and the Mechanism of Homogeneous Nucleation of Ice Ih
- Probing Small Protonated Water Clusters in Acetonitrile Solutions by 1H NMR
- Double Hydrogen Transfer in Low Symmetry Porphycenes
- Nuclear Spin Selective Torsional States: Implications of Molecular Symmetry
Articles in the same Issue
- Editorial
- Biography of Prof. Dr. Hans-Heinrich Limbach
- Alumni and long term guests of the Limbach group
- NMR and FT-IR Studies on the Association of Derivatives of Thymidine, Adenosine, and 6-N-Methyl-Adenosine in Aprotic Solvents
- Competition between Hydrogen Bonds and Lewis Acid-Base Interactions in the Equilibria between Bis(pentafluorophenyl)borinic Acid and Pyridine: Insights from NMR, Diffractometric and Computational Studies
- Energy Analysis of Competing Non-Covalent Interaction in 1:1 and 1:2 Adducts of Collidine with Benzoic Acids by Means of X-Ray Diffraction
- A TT Dinucleotide with a Nonionic Silyl Backbone: Impact on Conformation and H-Bond Mediated Base Pairing as Studied by Low-Temperature NMR
- Oxygen and Hydrogen Isotopic Preference in Hydration Spheres of Chloride and Sulfate Ions
- Ab Initio Study of Cooperative Effects in Complexes X:HBO:Z, with X, Z=LiH, HNC, HF, HCN, HCl, ClF, and HBO: Structures, Binding Energies, and Spin-Spin Coupling Constants across Intermolecular Bonds
- The Structure and Dynamic Properties of 1H-Pyrazole-4-Carboxylic Acids in the Solid State
- Acridine – a Promising Fluorescence Probe of Non-Covalent Molecular Interactions
- First Example of Hydrogen Bonding to Platinum Hydride
- Interaction of Hydrogen with a Cobalt(0001) Surface
- Immobilization and Characterization of RuCl2(PPh3)3 Mesoporous Silica SBA-3
- Secondary Isotope Effects on 13C and 15N Chemical Shifts of Schiff Bases Revisited
- Analysis of Nutation Patterns in Fourier-Transform NMR of Non-Thermally Polarized Multispin Systems
- The Structure of Supercooled Water and the Mechanism of Homogeneous Nucleation of Ice Ih
- Probing Small Protonated Water Clusters in Acetonitrile Solutions by 1H NMR
- Double Hydrogen Transfer in Low Symmetry Porphycenes
- Nuclear Spin Selective Torsional States: Implications of Molecular Symmetry
