Oxide bridge

Ardon M, Bino A (1987) A New Aspect of Hydrolysis of Metal Ions The Hydrogen-Oxide Bridging Ligand (H3O-2). 65 1-28 Arendsen AF, see Hagen WR (1998) 90 161-192... 

However, as the hydrolysis proceeds Pu(OH)3+ is no longer the predominant species and the monomeric species aggregate to form polymers which consist of hydroxide or oxide bridges between the plutonium atoms ... 

The bridged complexes were prepared by (a) direct interaction of the two constituents or (b) one electron reduction of the fully oxidized bridged complex (it would be the Co "-Ru " complex in one example shown above ). The speed with which the reduction must be carried out depends on the subsequent electron transfer rate. Both chemical reductants or rapidly generated reducing radicals have been used. The latter approach (b) has been an effective one for investigating electron transfer within proteins (Sec. 5.9). A special approach (c) involves... 

CHRISTOU AND VINCENT Oxide-Bridged Manganese Chemistry... 

The purpose of this chapter is to review the current status of this model approach and to describe the structural types of discrete oxide-bridged Mn aggregates which have been synthesized to date. For completeness, all known nuclearities will be described, in terms of increasing nuclearity. Space restrictions preclude a complete survey and we shall concentrate mainly on the structural features of these materials the reader is referred to the original literature for more detail, such as variable-temperature magnetic susceptibility, electrochemical and EPR data. 

All reported trinuclear complexes possessing oxide bridges which have been characterized to date have been prepared from Mn04 in either aqueous or non-aqueous media, and possess the "basic carboxylate" structure viz. a / 3-oxide-centered Mna triangle. Both Mn Mn2 and Mns species are currently known, and their pertinent structural parameters are listed in Table II. 

In 1987, tetranuclear oxide-bridged Mn complexes became available which possess two distinct types of Mn...Mn separations. Vincent et al. showed that the trinuclear complexes containing [Mn 0] cores will react with 2,2 -bipyridine (bipy)... 

To complete our survey of structurally-characterized oxide-bridged Mn complexes, we describe species with nuclearities >4. Three distinct types have been reported hexanuclear, nonanuclear and dodecanuclear. The hexanuclear complex Mn602(piv)10(pivH)4 results from the treatment of MnC03 with pivalic acid in reflux-... 

Binuclear complexes with diimine bridges are dealt with here, but those with (hydr)oxide bridges are dealt with, alongside other types of (hydr)oxide bridged complexes, in Section 5.4.5.4 later in this chapter. 

There are two closely related aspects here, concerning species where an oxoanion such as sulfate or chromate forms a recognizably classical coordination complex and polyoxometallates where one, two, or many iron centers are incorporated in a multi-oxide-bridged polynuclear complex. 

Complexes with a double oxide bridged core, [Fe2(/u-0)2], are known. ... 

An unusual variant is to have both carboxylates in the same molecule, as in the m-phenylene-dipropionate (mpdp, (215)), which can support an oxide bridge as shown schematically in (216). Complexes containing such iron-iron bridging include [Fe2(/i-0)(/i-/2-mpdp) HB(pz)3 2] and [Fe2(/i-0)(/2-mpdp)(bipy)2Cl2]. ... 

The most simple species which contain single oxide bridges between aluminium centres are monomers of the type (R2Al)20. However, the... 

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