The effect of the crystal environment on the metal–ligand interaction and the ligand field spectrum of CrF3−6

1992 ◽  
Vol 96 (6) ◽  
pp. 4163-4170 ◽  
Author(s):  
K. Pierloot ◽  
E. Van Praet ◽  
L. G. Vanquickenborne
Keyword(s):  
Ligand Field ◽  
Ligand Interaction ◽  
Field Spectrum ◽  
Metal Ligand

Metal–ligand interaction of Ti–C6H6 complex size-selected by a 2-m long electrostatic hexapole field

2003 ◽  
Vol 369 (1-2) ◽  
pp. 55-59 ◽  
Author(s):  
Kohei Imura ◽  
Hiroshi Ohoyama ◽  
Toshio Kasai
Keyword(s):  
Ligand Interaction ◽  
Metal Ligand

Hapticity of asymmetric rhodium-allyl compounds in the light of real-space bonding indicators

2018 ◽  
Vol 233 (9-10) ◽  
pp. 615-626
Author(s):  
Stefan Mebs ◽  
Sabrina Imke Kalläne ◽  
Thomas Braun
Keyword(s):  
Real Space ◽  
Molecular Structures ◽  
Dft Study ◽  
Interaction Patterns ◽  
Ligand Interaction ◽  
Complex Metal ◽  
Allyl Compounds ◽  
Back Donation ◽  
Metal Ligand

Abstract Rhodium boryl complexes are valuable catalysts for hydro- or diboration reactions of alkenes, but can also react with ketones (R2C=O) and imines (R2C=NR′) giving rise to insertion products having formally Rh–R2C–O/NR′–B linkages. The resulting molecular structures, however, may show complex metal–ligand and ligand–ligand interaction patterns with often unclear metal–ligand connectivities (hapticities, ηn). In order to assign the correct hapticity in a set of asymmetric rhodium-allyl compounds with molecular structures indicating η1−5 bonding, a comprehensive DFT study was conducted. The study comprises determination of a variety of real-space bonding indicators derived from computed electron and pair densities according to the AIM, ELI-D, NCI, and DORI topological and surface approaches, which uncover the metal–ligand connectivties and suggest an asymmetric ligand–metal donation/metal–ligand back-donation framework according to the Dewar–Chatt–Duncanson model.

Insight of the Metal–Ligand Interaction in f‐Element Complexes by Paramagnetic NMR Spectroscopy

2019 ◽  
Vol 25 (17) ◽  
pp. 4435-4451 ◽  
Author(s):  
Matthieu Autillo ◽  
Laetitia Guerin ◽  
Thomas Dumas ◽  
Mikhail S. Grigoriev ◽  
Alexandre M. Fedoseev ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Paramagnetic Nmr ◽  
Ligand Interaction ◽  
Metal Ligand

Cobalt(ii) ions detection using carbon dots as an sensitive and selective fluorescent probe

RSC Advances ◽  
2016 ◽  
Vol 6 (72) ◽  
pp. 67481-67487 ◽  
Author(s):  
Depeng Kong ◽  
Fanyong Yan ◽  
Ziyi Han ◽  
Jinxia Xu ◽  
Xingfei Guo ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Carbon Dots ◽  
Fluorescent Detection ◽  
Ligand Interaction ◽  
Metal Ligand

Carbon dots were explored for fluorescent detection of Co2+ through metal–ligand interaction. Moreover, the quenched fluorescence can be turned on with the addition of biothiols, which demonstrates the possible mechanism.

Die reversible Einelektronen-Oxydation von Metallochlorinen und ein Vergleich der Liganden Octaäthylporphin und -chlorin

1970 ◽  
Vol 25 (3) ◽  
pp. 255-265 ◽  
Author(s):  
Jürgen-Hinrich Fuhrhop
Keyword(s):  
Saturated Calomel Electrode ◽  
Esr Spectra ◽  
Ligand Field ◽  
Ionic Character ◽  
Unusual Behavior ◽  
Oxidation Potentials ◽  
Porphyrin Derivatives ◽  
The One ◽  
Porphyrin Macrocycles ◽  
Metal Ligand

Many metallochlorins can be reversibly oxidized in a one electron step. The midpoint oxidation potentials of magnesium-octaethyl-chlorin (MgOÄC), ZnOÄC, CuOÄC, NiOÁC and PdOÄC were found to be approximately 107, 197, 331, 356, and 422 mV vs. a saturated calomel electrode in chloroformmethanol. As with analogous metalloporphyrins the order of the oxidations potentials increases approximately linearly with the electronegativity values of the metal ions. The midpoint potentials of the one-electron oxidation of metallochlorins were found to be about 300 mV lower than those of analogous metallporphyrins. Sn (IV) -OÄC-dihydroxide and the monocation of OÄC could not be reversibly oxidized. A simple electrostatic argument can explain the oxidation behavior of these and other porphyrin derivatives. The more negative the ligand ring, the easier it is to remove an electron and vice versa. Thus experimental results point to a more ionic character of the metal-ligand bonds in metallochlorins as compared to metalloporphyrins. The unusual behavior of chlorophyll a and the optical and ESR-spectra of the resulting radicals are discussed.Some general properties of the chlorin- and porphyrin macrocycles are compared. Characteristic differences between the two ligand-systems are explained by the low basicity of the pyrrolin-nitrogen and the decreased symmetry of the ligand field in the chlorins.

The ligand field spectrum of K3[Cr(OH)6]

1988 ◽  
Vol 150 (1-2) ◽  
pp. 127-128 ◽  
Author(s):  
A. Ceulemans ◽  
B. Coninckx ◽  
C. Görller-Walrand ◽  
H. Jacobs ◽  
J. Bock
Keyword(s):  
Ligand Field ◽  
Field Spectrum

Synthesis and ligand field spectrum of potassium heptafluoroniobate(IV)

1974 ◽  
Vol 13 (9) ◽  
pp. 2242-2245 ◽  
Author(s):  
L. O. Gilpatrick ◽  
L. M. Toth
Keyword(s):  
Ligand Field ◽  
Field Spectrum

Theoretical analysis of the ligand field spectrum of K3CoF6

1994 ◽  
Vol 224 (1-2) ◽  
pp. 207-212 ◽  
Author(s):  
L.G. Vanquickenborne ◽  
K. Pierloot ◽  
E. Duyvejonck
Keyword(s):  
Theoretical Analysis ◽  
Ligand Field ◽  
Field Spectrum
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