Oxide ligands

The ranking is consistent with the three trends for determining A nature of the ligands, oxidation state of the metal, and position of the metal in the periodic table. 

The well-known ambiguities in limiting descriptions of metal and ligand oxidation states are summarized below. 

It is interesting to note that orthometallation occurs preferentially at the aryl ring in the thiolactone 69 despite the availability of oxygen as a potential donor ligand oxidation of the dinuclear complex 70 by ceric ion gives the condensed isobenzothiophene derivative 71 in unspecified yield152 (Scheme 85). 

Figure 8.2. The metal-ion dependence of ligand oxidation in complexes of the reduced Curtis macrocycle.

Fig. 22. Remarkable activation-by-ligand-oxidation pathways for the reaction of ruthenium-arenes with thiolates. (a) Reaction of [Ru (r 6-bip)(en)(OH2)]+ with GSH (b) direct synthesis of ruthenium-arene sulfenato complexes (c) the air-stable thiolato complexes are oxidized in the presence of the antioxidant GSH.

The results of Weiss field calculation on ferric ions at the surface metal ion sites are given in Figure 6 of ref 4, and the values for room temperature are shown in Figure 10. Since both ferric and pentavalent Sb ions can occupy octahedral or distorted octahedral sites with six ligand oxide ions and bulk hematite is considered to accommodate pentavalent Sb—119 ions in the metal ion sites (3 ), we can estimate STHF interactions on tetravalent Sn-119 ions at the surface metal ion sites of hematite. Using the magnetization of surface ferric ions at room temperature, the STHF magnetic fields on tetravalent Sn-119 ions at the surface sites are calculated to be... 

Group VI Donors. Oxygen and sulphur donor ligands. Oxidative addition of tetrachloro-l,2-benzoquinone to rrans-[Ir(CO)Cl(PR3)2] (R3 — Ph3 or Ph2Me) has been shown to give the Ir ° products [Ir(02CgCl4)(C0)Cl(PR3)2], whose structures (45) were confirmed from far-i.r. and H n.m.r. data. Comparison... 

The lowest energy excited triplet state of FePc is known to have a life time of about 45 nanoseconds (33) and we expect the life time of the lowest energy excited triplet state of FePc(Im )2 Also to be in the same time scale. Electrochemical oxidation at the phthalocycuiine ligand oxidation... 

Ligand (233) contains two 1,2-phenylenediamine domains that can be independently oxidized, and this is observed in the complex [(NH3)4Ru(/i-233)Ru(NH3)4] " " which undergoes two, two-electron ligand-oxidation processes further oxidation generates Ru -containing... 

Contents Formal Oxidation Numbers. Configurations in Atomic Spectroscopy. Characteristics of Transition Group Ions. Internal Transitions in Partly Filled Shells. Inter-Shell Transitions. Electron Transfer Spectra and Collectively Oxidized Ligands. Oxidation States in Metals and Black Semi-Conductors. Closed-Shell Systems, Hydrides and Back-Bonding. Homopolar Bonds and Catenation. Quanticule Oxidation States. Taxological Quantum Chemistry. 

Photoreduction of ammine complexes containing aliphatic amines instead of ammonia does not lead to production of molecular nitrogen instead, a variety of other ligand oxidation products are formed. Moeller and co-workers have studied three such systems in 3M HC1 solution 58 59 rather similar results have been obtained in more dilute acid solutions.55... 

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