Related Experiment Video
Updated: Oct 3, 2026

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
Heterometallic Homo- and Heteroleptic Porphyrinate Dimers with a Rhodium-Thallium Bond
Dimitra Daphnomili1, W. Robert Scheidt, Jaroslav Zajicek
1Department of Chemistry, Laboratory of Bioinorganic Coordination Chemistry, School of Sciences, University of Crete, P.O. Box 1470, 714 09 Heraklion, Crete, Greece, and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556.
Abstract:
The synthesis and spectroscopic characterization of four heterometallic porphyrinate dimers containing rhodium-thallium metal-metal bonds are reported. The investigated compounds are represented by the formula (Porph)Rh-Tl(Porph'), where Porph and Porph' are OEP and/or TPP. UV/visible spectroscopy of the title complexes confirms the presence of a strong pi-pi interaction between the macrocycles in each derivative. With (1)H and (13)C NMR data, we were able to distinguish two major NMR regions: the endo, between the metal-metal bonded macrocycles, and the exo, outside the macrocycles, which are characteristic features of porphyrinic dimers. (205)Tl NMR for the title complexes was performed, and the chemical shifts of the thallium nucleus are presented. For the four complexes, the magnitudes of spin-spin coupling constants between thallium and rhodium nuclei have been measured for the first time. Finally, reactions with selected substrates were studied in order to investigate the reactivity as well as the polarity of the metal-metal bond.
More Related Videos
10:52Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
Published on: July 27, 2022
11:44Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions
Published on: March 20, 2014
Related Concept Videos
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Heterogeneous Catalysis
Valence Bond Theory
Coordination Number and Geometry
Properties of Organometallic Compounds