Diffusion and NOE NMR spectroscopy. Applications to problems related to coordination chemistry and homogeneous catalysis

2003 ◽  
pp. 4007-4014 ◽  
Author(s):  
Paul S. Pregosin ◽  
Eloísa Martínez-Viviente ◽  
P. G. Anil Kumar
Keyword(s):  
Coordination Chemistry ◽  
Nmr Spectroscopy ◽  
Homogeneous Catalysis

NMR Spectroscopy and Homogeneous Catalysis

ChemInform ◽  
2007 ◽  
Vol 38 (26) ◽  
Author(s):  
Eloisa Martinez Viviente ◽  
Paul S. Pregosin ◽  
Daniele Schott
Keyword(s):  
Nmr Spectroscopy ◽  
Homogeneous Catalysis

scholarly journals Unraveling the coordination structure-performance relationship in Pt1/Fe2O3 single-atom catalyst

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Yujing Ren ◽  
Yan Tang ◽  
Leilei Zhang ◽  
Xiaoyan Liu ◽  
Lin Li ◽  
...  
Keyword(s):  
Coordination Chemistry ◽  
Homogeneous Catalysis ◽  
Catalytic Performance ◽  
Inert Atmosphere ◽  
Single Atom ◽  
Unique Role ◽  
Local Coordination ◽  
Single Atoms ◽  
Heterogeneous And Homogeneous Catalysis

Abstract Heterogeneous single-atom catalyst (SAC) opens a unique entry to establishing structure–performance relationship at the molecular level similar to that in homogeneous catalysis. The challenge lies in manipulating the coordination chemistry of single atoms without changing single-atom dispersion. Here, we develop an efficient synthetic method for SACs by using ethanediamine to chelate Pt cations and then removing the ethanediamine by a rapid thermal treatment (RTT) in inert atmosphere. The coordination chemistry of Pt single atoms on a Fe2O3 support is finely tuned by merely adjusting the RTT temperature. With the decrease in Pt-O coordination number, the oxidation state of Pt decreases, and consequently the hydrogenation activity increases to a record level without loss of chemoselectivity. The tunability of the local coordination chemistry, oxidation states of the metal, and the catalytic performance of single atoms reveals the unique role of SACs as a bridge between heterogeneous and homogeneous catalysis.

Lower- and upper-rim-modified derivatives of 1,3,5-triaza-7-phosphaadamantane: Coordination chemistry and applications in catalytic reactions in water

2012 ◽  
Vol 85 (2) ◽  
pp. 385-396 ◽  
Author(s):  
Luca Gonsalvi ◽  
Antonella Guerriero ◽  
Frédéric Hapiot ◽  
Donald A. Krogstad ◽  
Eric Monflier ◽  
...  
Keyword(s):  
Coordination Chemistry ◽  
Homogeneous Catalysis ◽  
Water Soluble ◽  
Catalytic Reactions ◽  
Water Soluble Phosphine ◽  
Upper Rim ◽  
Derivatives Of

In this article, a brief review of the recent functionalizations of the cage-like water-soluble phosphine 1,3,5-triaza-7-phosphaadamantane (PTA), involving N-quaternization (lower rim) and introduction of a side arm in C-6 position (upper rim) will be presented, highlighting selected examples in their use as ligands for ruthenium(II), iridium(I), and rhodium(I) moieties together with applications of the related complexes in homogeneous catalysis.

1,3-P,N hybrid ligands in mononuclear coordination chemistry and homogeneous catalysis

2019 ◽  
Vol 380 ◽  
pp. 1-16 ◽  
Author(s):  
Mark K. Rong ◽  
Flip Holtrop ◽  
J. Chris Slootweg ◽  
Koop Lammertsma
Keyword(s):  
Coordination Chemistry ◽  
Homogeneous Catalysis ◽  
Hybrid Ligands

207Pb−1H Two-Dimensional NMR Spectroscopy:  A Useful New Tool for Probing Lead(II) Coordination Chemistry

2000 ◽  
Vol 39 (7) ◽  
pp. 1391-1397 ◽  
Author(s):  
Elizabeth S. Claudio ◽  
Marc A. ter Horst ◽  
Cameron E. Forde ◽  
Charlotte L. Stern ◽  
Matthew K. Zart ◽  
...  
Keyword(s):  
Coordination Chemistry ◽  
Nmr Spectroscopy ◽  
Two Dimensional

Hybrid Pyrazolyl-1,2,3-Triazolyl Tripodal Tetraamine Ligands: Click Synthesis and Cobalt(III) Complexes

2015 ◽  
Vol 68 (7) ◽  
pp. 1160 ◽  
Author(s):  
John R. Cubanski ◽  
Matthew E. Reish ◽  
Allan G. Blackman ◽  
Peter J. Steel ◽  
Keith C. Gordon ◽  
...  
Keyword(s):  
Coordination Chemistry ◽  
Nmr Spectroscopy ◽  
Tripodal Ligand ◽  
X Ray ◽  
X Ray Crystallography ◽  
Cuaac Reaction ◽  
Racemic Mixtures ◽  
Click Synthesis ◽  
Cis Isomer ◽  
Metallic Systems

A family of tripodal tetraamine ligands incorporating two pyrazolyl and one 1,2,3-triazolyl donor arm have been synthesized in modest-to-excellent yields (42–90 %) using the copper(i)-catalyzed azide–alkyne cycloaddition (CuAAC) reaction. Mono-, bis-, and tris-tripodal ligand scaffolds were readily generated using this method. The coordination chemistry of the ligands with cobalt(iii) ions has been studied, and cobalt(iii) carbonato complexes of the ligands have been isolated and characterized spectroscopically and crystallographically. X-ray crystallography and NMR spectroscopy of the mono-metallic complexes showed that racemic mixtures of the cis-isomer are formed selectively. The di- and tri-metallic systems could not be crystallized, but NMR spectroscopy indicates that these compounds were isolated as mixtures of stereoisomers.

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