Mixed alkoxo

In the absence of crystal structure data, and on the basis of 77-300 K susceptibility data, planar rhomboidal structures were postulated for the following alkoxo-iron (III) species (177,178). Further work is warranted, as was the case for the V and Cr analogues described earlier. Mixed alkoxo- 8-diketonato species could prove to be more tractable. 

Glycols are highly reactive towards metal alkoxides to form homoleptic and mixed alkoxo-glycolate derivatives. This alcohol exchange reaction (see Section 7.10.3.1.3) is driven by the formation of chelated or bridged structures with both (dianionic) OCR2CR2O—... 

B-C bonds, 3, 97 B-N bonds, 3, 97 B-O bonds, 3,94 B-P bonds, 3, 97 B-Si bonds, 3, 97 oxo acid anion complexes, 3, 96 Borates, alkoxo-, 3, 94 Borates, amidotrihydro-, 3,92 Borates, aryloxo-, 3, 94 Borates, carboxylato-, 3,96 Borates, catechol, 3,95 Borates, chlorosulfato-, 3,97 Borates, dicarboxylato-, 3,96 Borates, dipyrazol-l-yl-, 3, 92 Borates, halogeno-, 3,92 Borates, halogenohydro-, 3,90 Borates, hydro-, 3,90 Borates, hydrohydroxo-, 3,90 Borates, hydropyrazol-l-yl-, 3, 92 Borates, hydroxo-, 3,94 Borates, hydroxycarboxylato-, 3,96 Borates, inositol, 3, 95 Borates, monoalkyl-, 3, 92 Borates, monophosphido-, 3, 92 Borates, peroxohydroxo-, 3, 94 Borates, polyol, 3, 95 Borates, pyrrol-l-yl-, 3, 92 Borates, sulfato-, 3, 97 Borates, tetrabromo-, 3, 92 Borates, tetrachloro-, 3, 92 Borates, tetrafluoro-, 3, 92 minerals, 6, 847 Borates, tetrahalogeno-mixed, 3, 93 nB NMR, 3, 92 Borates, tetraiodo-, 3, 92 Borates, tetranitrato-, 3, 96 Borates, tetraperchlorato-, 3, 97 Borates, tripyrazol-l-yl-, 3, 92 Borax, 3,101 Borazines... 

Mixed-ligand complexes of the type Ni(OR)L (L = deprotonated ancillary ligand) are formed when l-amino-2-ethanol, /3-diketones or carboxylic acids are reacted with bis-alkoxo complexes.1490-1492... 

It should be mentioned that in many cases it turns out to be impossible to isolate the bimetallic mixed-ligand complex. The isolable reaction products appear to be homometallic heteroleptic species. The composition of the reaction products is often dependent on the polarity and donor properties of the solvent as the molecules of the latter compete with the bridging alkoxo-, car-boxylato-, or p-diketonatoligands for the place in the coordination sphere of metal atoms. Thus if the reaction of Pb(OAc)2 with Sn(OBu )4 mentioned above is carried out in pyridine, it gives Sn(OBu )3(OAc)Py and Pb(OAc)(OBu ) as the major products and not the bimetallic complex [298]. Sn(OBu )3(OAc)Py turns also to be the major product of the reaction of Sn(OBu )4with Me3SiOAc... 

Several Mn2(II,II) complexes exist with different bridging patterns including solely carboxylates, or those associated with aqua, hydroxo, alkoxo, or phenoxo bridges.Conversely, mixed-valent Mn2(II,III) derivatives have received much less attention. 

The interaction of [Pd(OPh)2(bpy)J with HOCH(CF2)2 affords a mixed (ar-yloxo)(alkoxo) palladium complex (219) according to the reaction shown below [Eq. (121)]. 

They exchange the alkoxo group with the alcohol in the mixed solvent ... 

---