Homometallic alkoxides

For more than 30 years at Lomonosov Moscow State University, later at Karpov Institute of Physical Chemistry, and recently at the Swedish University of Agricultural Sciences, Uppsala (V. G. Kessler), the authors of this book have systematically studyiedthe synthesis and properties of homometallic alkoxides of Groups I-Vm of the Periodic Table, the bimetallic derivatives (alkox-oaluminates, -titanates, -zirconates, -niobates, -tantalates, -molybdates, -tung-... 

The reaction of metal halides with an alkoxide or aryl oxide (most commonly an alkali metal alkoxide), can result in metathetic exchange to give the required complex (equation 6). Such reactions can also result in the formation of heterometallic species (such as NaZr2(OR)4) this can be a problem when homometallic alkoxides are desired, but it is an important route to heterometallic alkoxides and aryloxides. The nature of the product can be influenced by the alkali metal, the alkoxide ligand, and the relative amounts of the... 

For all elements involved in electrooptical ceramics, their homometallic alkoxides, of the general formula Af(OR) , or oxoalkoxides, MO(OR) , are either... 

Table 2 Homometallic Alkoxides of Metals Involved im Electroptical Ceramics ...

Mixed-metal alkoxides are generally covalent [4]. As a result, they are soluble in organic nonpolar solvents (often less in alcohols), generally more than the parent alkoxides. Some can be sublimed without disproportionation, the volatility following the same variation as for the homometallic alkoxides (OtBu > OiPr > OEt > OMe). Mass spectrometry, for instance, established that heterometallic LiNb fragments were retained in the gas phase for LiNb(OEt)6. 

Interestingly, homometallic alkoxides of gallium, indium, germanium, 488 jjjji89-i9i iead, arsenic, antimony, bismuth, " ... 

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