Oxygen—antimony bonds reactions with

Exchange of antimony-carbon bonds with antimony-oxygen bonds is reported in a thorough study of the disproportionation of arylantimony oxides, RSbO (126, 127). At moderately elevated temperatures ( 100° C) in the solid state, the reaction of Eq. (157)... 

A series of functionalized alkenes has been subjected to selective epoxidation reactions. Oxidation of perfluorinated vinyl polyethers by bubbling oxygen through the liquid that contains a catalytic amount of a Lewis acid, e.g. antimony(V) fluoride, results in the formation of acid fluorides together with a smaller amount of C = C bond cleavage.76 Perfluorinated pentaaIkyI-2.3-dihydrofuran 38, an example of an unsaturated cyclic ether that is quite stable owing to perfluoroalkylation. is epoxidized by hypochlorite to the product 39 at 45 C.62... 

A slightly different pattern of reactivity is seen when 3.8 interacts with antimony(m) fluoride in methanol. In this case, the product contains a ligand derived from the hemia-cetal, but the hydroxy group is deprotonated and co-ordinated to the metal centre, to give an N,iV,0-bonded anionic ligand (Fig. 3-17). It is not known whether the co-ordination of the oxygen to the metal centre occurs after the hydration reaction (in which case we are... 

In contrast, use of metalloid elements, such as silicon, tin antimony or boron, which can form weak covalent bonds with oxygen, nitrogen or sulfur substituents during the course of the reaction, results in templated products that may be obtained metal-free by simple hydrolysis. These covalent template reactions (the M—X bond is essentially covalent in these cases) also have the advantage that the... 

The SRN1 process has proven to be a versatile mechanism for replacing a suitable leaving group by a nucleophile at the ipso position. This reaction affords substitution in nonactivated aromatic (ArX) compounds, with an extensive variety of nucleophiles ( u ) derived from carbon, nitrogen, and oxygen to form new C—C bonds, and from tin, phosphorus, arsenic, antimony, sulfur, selenium, and tellurium to afford new C-heteroatom bonds. 

Bonds to Oxygen.—Mossbauer data have been obtained for (Ph2Sb)20 and a series of trialkoxystibines Sb(OR)3, where R = Et, Pr, Bun, or Bu. 756 Cyclic esters, analogous to those discussed above for arsenic, can be obtained with antimony as the central atom by reactions between PhSbCl2 and diols, dithiols, or monothioglycols.757... 

---