METHOD FOR PRODUCING SILASESQUIOXANE METAL COMPLEXES, NOVEL SILASESQUIOXANE METAL COMPLEXES AND THE USE THEREOF

摘要

PCT No. PCT/EP98/01932 Sec. 371 Date Oct. 18, 1999 Sec. 102(e) Date Oct. 18, 1999 PCT Filed Apr. 2, 1998 PCT Pub. No. WO98/46352 PCT Pub. Date Oct. 22, 1998A method for producing silasesquioxane metal complexes of the formula (II)((R1SiO1,5)n(R2aSiO1,5)m((B)q(O)r))u(M)v(Y)win which R1 represents C5-C10-cycloalkyl, norbornyl or adamantyl; R2a represents oxygen; B represents H, OH, halogen, alkoxy, SiR3y in which R3 can be C1-C4 alkyl, aryl or substituted silyl groups, and y represents 2 or 3, and R1 and R3 can be functionalized; M represents metals of the 4th to 7th subgroups of the periodic system of elements; Y represents C1-C20 alkyl or aryl groups devoid of beta-hydrogen, silyl, alkoxy, OH, halogen, oxo, imido, fluorenyl, indenyl, cyclopentadienyl, in which the individual ligands can be substituted; n=6 or 7; m=0 or 1; q=0-2; r=0-2; u=1-4; v=1-4; w=0-12, in which a metal compound of the 4th to 7th subgroups of the periodic system of elements and at least one silasesquioxane compound of the formula (I)(R1SiO1,5)n(R2SiO1,5)m((H)p(B)q(O)r))in which R1, B, n, m, q and r have the above meanings; R2 represents OH, and p equals 0-4, are suspended in an alkylated aromatic hydrocarbon, optionally in the presence of a basic compound, with stirring at -80 to +110 DEG C., and a reaction product is separated at room temperature. The invention also relates to metal complexes which include an oxidic metal cluster containing titanium atoms, in which each titanium atom has been coordinated x6, and to the use of such metal complexes as catalysts for oxidation or epoxidation of unsaturated hydrocarbons or alcohols in an aqueous medium.