Metal complex containing one or more silsesquioxane ligands

Metal complex containing one or more silsesquioxane ligands, characterised in that the metal complex has the formula

• Zy(MAxBq)b (I),
• wherein
• Z is a silsesquioxane according to the formula
• R7−lSi7O12YD1+l (II),
• M is a metal from groups 3-6 of the Periodic System of the Elements and the lanthanides,
• A is a monoanionic ligand bound to the metal,
• B is a π-bound ligand,
• y represents the number of silsesquioxane ligands and is 1-10,
• b represents the number of metal groups and is 1-20,
• q is 0,1 or 2,
• x is the number of substituents A bound to the metal;
• the value of x depends on the metal used and is equal to the valency of the metal minus 1, 2, 3 or 4,
• R is a substituent bound to Si, wherein the R groups can be the same or different and can for instance be hydrogen or an alkyl, aryl or silyl group,
• Y is an atom from group 13 or 14 of the Periodic System of the Elements,
• D is a group, directly bound to Y or Si with one atom from group 15 or 16 of the Periodic System of the Elements, for instance O, S, NR1, PR1, N= or P=, wherein R1 is chosen from hydrogen, alkyl, aryl, silyl or stannyl groups, and
• determines the amount of substituents R and atoms D and is equal to 0, 1, 2 or 3.