Spin-labelled Ligands

1974 ◽  
Vol 52 (13) ◽  
pp. 2454-2462 ◽  
Author(s):  
C. T. Cazianis ◽  
D. R. Eaton
Keyword(s):  
Coordination Chemistry ◽  
Unpaired Electron ◽  
Ligand Exchange ◽  
Metal Ion ◽  
Functional Group ◽  
Lewis Base ◽  
Exchange Reactions ◽  
Base Site ◽  
Relative Electron ◽  
A Site

A spin-labelled ligand is defined as a molecule with two functional groups, one of which provides a Lewis base site suitable for complexing to a metal ion. The second functional group comprises a site bearing an unpaired electron. The possible utility of such compounds in coordination chemistry has been explored. The spin density distribution in 4-pyridyl-t-butyl nitroxide provides information on the relative electron accepting abilities of different metal ions in various ligand environments. A method for measuring the rates of very rapid ligand exchange reactions is also suggested.

A first-principles study of the atomic layer deposition of ZnO on carboxyl functionalized carbon nanotubes: the role of water molecules

2021 ◽  
Vol 23 (5) ◽  
pp. 3467-3478
Author(s):  
J. I. Paez-Ornelas ◽  
H. N. Fernández-Escamilla ◽  
H. A. Borbón-Nuñez ◽  
H. Tiznado ◽  
Noboru Takeuchi ◽  
...  
Keyword(s):  
First Principles ◽  
Ligand Exchange ◽  
Functional Group ◽  
Atomic Layer ◽  
High Reactivity ◽  
Water Molecules ◽  
Exchange Reactions ◽  
Layer Deposition ◽  
The Right

Atomic description of ALD in systems that combine large surface area and high reactivity is key for selecting the right functional group to enhance the ligand-exchange reactions.

Effects of calcium on the kinetics of a model disjunctive ligand exchange reaction: implications for dynamic trace metal ion speciation

2019 ◽  
Vol 21 (1) ◽  
pp. 89-103
Author(s):  
Laura T. Rea ◽  
Yi Xu ◽  
Nathan E. Boland
Keyword(s):  
Trace Metal ◽  
Exchange Reaction ◽  
Ligand Exchange ◽  
Metal Ion ◽  
Multidentate Ligands ◽  
Kinetic Behavior ◽  
Exchange Reactions ◽  
Ligand Exchange Reaction ◽  
Calcium Affinity ◽  
Kinetics Of

Differences in the calcium affinity of exchanging multidentate ligands affect the kinetic behavior of disjunctive ligand exchange reactions.

Coordination chemistry of 9-sila- and 9-germa-phenanthrenes — unique coordination modes in their metallene complexes

2014 ◽  
Vol 92 (6) ◽  
pp. 441-446 ◽  
Author(s):  
Yoshiyuki Mizuhata ◽  
Koji Inamura ◽  
Norihiro Tokitoh
Keyword(s):  
Coordination Chemistry ◽  
Ligand Exchange ◽  
Crystallographic Analysis ◽  
Carbonyl Complexes ◽  
Exchange Reactions ◽  
X Ray ◽  
Coordination Modes ◽  
Carbonyl Ligands ◽  
Chromium Carbonyl ◽  
Chromium Carbonyl Complexes

Ligand exchange reactions of 9-sila- and 9-germa-phenathrenes with chromium carbonyl complexes, [Cr(CH3CN)3(CO)3] and [Cr(η6-benzene)(CO)3], were performed. Their reactions with [Cr(CH3CN)3(CO)3] afforded the corresponding η6-complexes, in which Cr(CO)3 moieties coordinated to the C6-rings. However, those with [Cr(η6-benzene)(CO)3] gave unique four-membered complexes bearing semibridging carbonyl ligands. All the structures of novel complexes were determined by NMR and X-ray crystallographic analysis.

Voltammetric Studies of Some Novel Fe(III) Complexes with Quadridentate Ligands. The Axial Ligand-Exchange Reactions in DMF and DMSO

1995 ◽  
Vol 60 (7) ◽  
pp. 1140-1157 ◽  
Author(s):  
Ljiljana S. Jovanovic ◽  
Luka J. Bjelica
Keyword(s):  
Oxidation State ◽  
Chemical Reactions ◽  
Ligand Exchange ◽  
Kinetic Data ◽  
Central Atom ◽  
Axial Ligand ◽  
Exchange Reactions ◽  
Ligand Effect ◽  
Condensation Products ◽  
Voltammetric Studies

The electrochemistry of four novel Fe(III) complexes of the type [Fe(L)Cl], involving quadridentate ligands based on the condensation products of benzoylacetone-S-methylisothiosemicarbazone with salicylaldehyde, 5-chlorosalicylaldehyde, 3,5-dichlorosalicylaldehyde or 5-nitrosalicylaldehyde, was studied in DMF and DMSO at a GC electrode. All complexes undergo a two-step one-electron reductions, usually complicated by chemical reactions. In solutions containing Cl-, the ligand-exchange reactions Cl--DMF and Cl--DMSO take place. Stability of the chloride-containing complexes was discussed in terms of the coordinated ligand effect, oxidation state of the central atom and, in particular, of the donor effect of the solvent. Some relevant kinetic data were calculated.

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