By Don Bradley, R. C. Mehrotra, Ian Rothwell, A. Singh
This article is predicated on steel Alkoxides (Academic Press, 1978), and has been up to date and extended to incorporate advancements during this transforming into box from the earlier twenty years. assurance comprises homometallic alkoxides; heterometallic alkoxides; x-ray crystal constructions of alkoxo steel compounds; steel oxo-alkoxides; steel aryloxides; and their commercial purposes in such components as microelectronics, ceramics, non-linear optical fabrics, high-temperature superconductors, and really good glasses. meant as a reference for these operating within the box, in addition to to be used as a supplementary textual content for complicated inorganic chemistry classes.
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Extra resources for Alkoxo and Aryloxo Derivatives of Metals
166) and rhenium(V) (Eq. 167) have been prepared429 according to the following reactions: WF6 C Me3 SiOMe ! WF2 OMe ii NaOMe i Li ! W2 Fx OMe 10 THF x D 1–3 4 x THF ! 166 ReF6 i Si OMe ii Mg OMe 4 ! CH3 CN, 40° C 2 HOMe 2 ! 430 A methoxo group is transferred to the metal atom while phosphorus is hydrogenated to give a PH bridge: 5[AnH2 Á5 -C5 Me5 2 ]2 C 4P OMe 3 toluene ! 168 In contrast to the expected elimination of an ester in the reaction of Sn OBut 4 with Sn OAc 4 as well as with Me3 SnOAc in a reﬂuxing hydrocarbon solvent, only ligand exchanges of the types shown below have been demonstrated to occur in coordinating solvents such as pyridine:431 3Sn OBut 4 C 3Sn OAc 4 pyridine !
3 Synthesis of divalent Cr, Mn, Co, Zn, Cd, Ge, Sn, and Pb alkoxides from corresponding metal bis (trimethylsilyl) amides. The composition of these products is inﬂuenced by a number of factors such as (i) the acidic character of the alcohols, (ii) the nature of precursor amide derivatives, (iii) the stoichiometry of the alcohols used, and (iv) the reaction conditions. g. [M OR 3 ]n and [M OR 4 ]n . Derivatives of the empirical formula M OR 3 are of special interest as, in these, association occurs primarily through the formation of metal–metal triple (MÁM) bonds359 rather than through the normal alkoxo bridges (Eq.
MCl2 C 2LiOR ROH/C6 H6 ! 2 Synthesis of soluble metal alkoxides The sterically compact metal alkoxides prepared by the lithium alkoxide method are generally insoluble and nonvolatile, owing to the formation of oligomers or polymers involving alkoxo bridging. 1). In this context the use of lithium derivatives of such ligands,21 which are conveniently prepared by the interaction of an alcohol with butyllithium, has played an important role. For example, the reactions of LiOR (R D a sterically demanding alkyl, halogenated alkyl, or alkyl with donor functionalities) with metal halides yield derivatives generally with unprecedented structural and reactivity features.