Dinuclear oxo complexes

In the latter case, a dinuclear oxo bridged complex [Au2(N,N)2(p,-0)2][BF4]2 is also formed in small amounts. The same oxo complexes are obtained in high yields, as the... 

The cationic dinuclear oxo-gold(m) complexes of substituted bipyridyls react with olefins to give the stable coordination compounds shown in Scheme 79. The reactions are often incomplete, produce many byproducts, and give low yields of the olefin complexes/... 

The [TcO(OH2)(CN)4] complex is, as shown by the complex formation constants in Table II, more reactive than the corresponding complexes of either the Re(V) or W(IV). This, coupled with the fact that the dinuclear species [Tc203(CN)8]4 is formed rapidly whenever there are appreciable amounts of the [TcO(OH)(CN)4]2 complex present (71), i.e., below pH ca. 5.5, prohibits any experiment around these acidic conditions. A marked difference in the [H+] dependence for the Tc(V) compared to the above-mentioned Re(V) and W(IV) systems originates from the fact that the Tc(V) is much more reactive and had to be studied at pH values significantly higher than the )Ka2 value of ca. 4. This yielded results similar to the insert (a) in Fig. 16 for the rhenium(V) and only the exchange rate constants and the activation parameters for the hydroxo oxo complex for Tc(V) could thus be obtained (Table V). 

W02(S2CNR2)2] (R = Me, Et, Pr ) have been prepared59 by an oxo transfer utilizing a dinuclear Mov complex as depicted in equation (1). Because of their moisture sensitivity, these... 

One class of complexes, that of substituted catecholate ligands, has yielded a variety of mono- and di-nuclear MoVI complexes. Mo(CO)6 reacts with the oxidized form of the 3,5-di-ferf-butylcatechol (i.e. 3,5-di-rerr-butyl-l,2-benzoquinone) to yield Mo(dbcat)3 which reacts with 02 to give the dinuclear complex [MoO(dbcat)2]2.373 In contrast, reaction of Mo(CO)6 with 3,4,5,6-tetrachloro-l,2-benzoquinone yields the dinuclear non-oxo complex Mo2(02C6Cl)6.3S7 The complex Mo2Os(phenSQ) has already been discussed.363 This complex... 

The EXAFS studies of the MnIIIMnIV catalase from L. plantarum [82] reveal a 2.68 A Mn---Mn separation. Since dinuclear Mn complexes that contain only two oxo bridges usually have Mn-.-Mn distances over 2.7 A but less than 2.8 A, the smaller 2.68 A value suggests a triply bridging (p-0)2(p-earboxylato) formulation, and the presence of a di-p-oxo subfragment is consistent with the ENDOR studies and supported by additional EPR and XANES data [82,90,92], Importantly, the short Mn - Mn distance in the superoxidized state was detected without any interference from Mn-C scattering. 

Dinuclear oxo-bridged iron(m) complexes (K. S. Murray, Coord. Chem. Rev., 1974,... 

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