Reivindicaciones
1. Bidentate diimino-complex of nickel or palladium containing at least one group OSi(R)<3> wherein each R, equal to or different from each other, is selected from the group consisting of: C<1>-C<20> alkyl, C<3>-C<20> cycloalkyl, C<6>-C<20> aryl, C<2>-C<20> alkenyl, C<7>-C<20> arylalkyl, C<7>-C<20> alkylaryl, C<8>-C<20> arylalkenyl, and C<8>-C<20> alkenylaryl, linear or branched. 2. Bidentate diimino-complex according to claim 1 wherein the complex is represented by the following formulae: <img class="EMIRef" id="586109609-ib0019" /> wherein: M is nickel or palladium; n is 0, 1, 2 or 3; m is 1, 2 or 3; each X, equal to or different from each other, is selected from a group consisting of: halogen, hydrogen, OR, N(R)<2>, R; wherein R is selected from the group consisting of: C<1>-C<20> alkyl, C<3>-C<20> cycloalkyl, C<6>-C<20> aryl, C<2>-C<20> alkenyl, C<7>-C<20> arylalkyl, C<7>-C<20> alkylaryl, C<8>-C<20> arylalkenyl, and C<8>-C<20> alkenylaryl, linear or branched; two X taken together can also form an aromatic or aliphatic divalent ligand, containing two equal or different donor atoms belonging to the group 14-16 of the periodic table of the elements; each R1 , equal to or different from each other, is selected from the group consisting of: hydrogen, a monovalent aliphatic or aromatic hydrocarbon group, optionally containing heteroatoms of group 14 to 16 of the periodic table of the elements or boron; with the proviso that at least one R<1> group is represented by the formula: R<4>OSi(R)<3>; wherein each R, equal to or different from each other, is selected from the group consisting of: C<1>-C<20> alkyl, C<3>-C<20> cycloalkyl, C<6>-C<20> aryl, C<2>-C<20> alkenyl, C<7>-C<20> arylalkyl, C<7>-C<20> alkylaryl, C<8>-C<20> arylalkenyl, and C<8>-C<20> alkenylaryl, linear or branched; each R4 , equal to or different from each other, is a divalent aliphatic or aromatic hydrocarbon group containing from 1 to 20 carbon atoms, optionally containing from 1 to 5 heteroatoms of groups 14 to 16 of the periodic table of the elements and/or boron; each R2 , equal to or different from each other, is a radical which contains from 1 to 20 carbon atoms; this group optionally contains heteroatoms of group 14 to 16 of the periodic table of the elements and/or boron; each R3 , equal to or different from each other, is hydrogen or a radical which contains from 1 to 20 carbon atoms; this group optionally contains heteroatoms of group 14 to 16 of the periodic table of the elements and/or boron; two or more of R1, R2, R3 and R4 can also unite to form a from 4 to 15 membered aliphatic or aromatic ring; the ring may optionally contain heteroatoms of group 14 to 16 of the periodic table of the elements and/or boron. 3. Bidentate diimino-complex according to claim 2, wherein R4 is represented by the formula CR5<2>(R<6>)<a>CR<5>2 wherein each R5 , equal to or different from each other, is selected from the group consisting of: hydrogen, C<1>-C<20> alkyl, C<3>-C<20> cycloalkyl, C<6>-C<20> aryl, C<2>-C<20> alkenyl, C<7>-C<20> arylalkyl, C<7>-C<20> alkylaryl, C<8>-C<20> arylalkenyl, and C<8>-C<20> alkenylaryl, linear or branched; two R<5> can also unite to form a ring; R6 is a divalent radical selected from the group consisting of: O, NR, S, SiR<5>2 , C<1>-C<20> alkylidene, C<3>-C<20> cycloalkylidene, C<2>-C<20> alkenylidene, C<6>-C<20> arylidene, C<7>-C<20> alkylarylidene, C<7>-C<20> arylalkylidene, C<8>-C<20> arylalkenylidene, and C<8>-C<20> alkenylarylidene, linear or branched, optionally containing heteroatoms of group 14 to 16 of the periodic table of the elements, and/or boron; and a is 0 or 1. 4. Bidentate diimino-complex according to claim 3, wherein the group CR5<2>(R<6>)<a>CR<5>2OSi(R)3 is selected from the group consisting of: - CH<2>-CH<2>-OSiMe<3>; -CH<2>-(CH<2>)<p>-CH<2>-OSiMe<3> wherein p ranges from 1 to 10; - CH<2>-O-CH<2>-OSiMe<3>; -CH<2>-C<6>H<4>-CH<2>-OSiMe<3>; -CH(Et)-CH<2>-OSi(Et)<2>Me; - CH<2>-CH<2>-O-CH<2>OSi(iPr)<3>; -CH<2>-Si(CH<3>)<2>-CH<2>OSi(iPr)<3>; - CH<2>-CH<2>-Si(CH<3>)<2>-CH<2>OSi(iPr)<3>;-CH<2>-CH<2>-CH<2>-N(CH<3>)-CH<2>-CH<2>-CH<2>OSi(iPr)<3>; - C(Me)<2>-CH<2>-C<6>H<4>-CH<2>-CH<2>-OSi(C<5>H<11>)<3>;-CH<2>-CH<2>-C<6>H<4>-C<6>H<4>-O-CH<2>-CH<2>-OSi(CH<2>Ph)<3>; - C(CH<3>)<2>-C(CH<3>)<2>-OSi(C<6>H<4>Me)<3>; -CH(Me)-CH(Me)-OSi(Et)(Me)<2>. 5. Bidentate diimino-complex according to claims 2-4 wherein in formula I or II: each R1 is independently selected from the group consisting of: hydrogen; C<1>-C<20> alkyl; C<3>-C<20> cycloalkyl; C<6>-C<20> aryl; C<2>-C<20> alkenyl; C<7>-C<20> arylalkyl; C<7>-C<20> alkylaryl; C<8>-C<20> arylalkenyl; and C<8>-C<20> alkenylaryl; linear or branched, optionally substituted by BR<5>2 , OR<5>, SiR<5>3 , NR<5>2 ; or R<4>OSi(R)<3>; each R2 is independently selected from the group consisting of: C<1>-C<20> alkyl, C<3>-C<20> cycloalkyl, C<6>-C<20> aryl, C<2>-C<20> alkenyl, C<7>-C<20> arylalkyl, C<7>-C<20> alkylaryl, C<8>-C<20> arylalkenyl, and C<8>-C<20> alkenylaryl, linear or branched, optionally substituted by BR<5>2 , OR<5>, SiR<5>3 , or NR<5>2 ; each R3 is independently selected from the group consisting of: hydrogen, C<1>-C<20> alkyl, C<3>-C<20> cycloalkyl, C<6>-C<20> aryl, C<2>-C<20> alkenyl, C<7>-C<20> arylalkyl, C<7>-C<20> alkylaryl, C<8>-C<20> arylalkenyl, C<8>-C<20> alkenylaryl, linear or branched, optionally substituted by BR<5>2 , OR<5>, SiR<5>3 , or NR<5>2 . 6. Bidentate diimino-complex according to claims 2-5 represented by the following formulae: <img class="EMIRef" id="586109609-ib0020" /> 7. Process for the preparation of diimino-complex of formula I or II according to claims 3-6, comprising the steps of: 1) reacting a compound of general formula III or IV <img class="EMIRef" id="586109609-ib0021" /> wherein each Z is independently selected from the group consisting of: R<1> and CR<5>2 H, provided that at least one Z is representerd by the formula CR<5>2 H, with a Bronsted base selected from the group consisting of: organolithium compounds, organosodium compounds, organopotassium compounds, oranomagnesium compounds, sodium hydride, potassium hydride, lithium, sodium, or potassium; 2) contacting the obtained metallated compound with one equivalent of a compound of formula Y(R<6>)<a>CR<5>2 OSi(R)<3>, wherein Y is a leaving group; and reacting the obtained product with a compound of general formula L<q>MX<2>, wherein M is nickel or palladium; each X, equal to or different from each other, is selected from a group consisting of: halogen, hydrogen, OR, N(R)<2>, R; wherein R is selected from the group consisting of: C<1>-C<20> alkyl, C<3>-C<20> cycloalkyl, C<6>-C<20> aryl, C<2>-C<20> alkenyl, C<7>-C<20> arylalkyl, C<7>-C<20> alkylaryl, C<8>-C<20> arylalkenyl, and C<8>-C<20> alkenylaryl, linear or branched; two X taken together can also form an aromatic or aliphatic divalent ligand, containing two equal or different donor atoms belonging to the group 14-16 of the periodic table of the elements, L is a labile ligand and q is 1 or 2. 8. Process for the preparation of diimino-complex according to claim 7, wherein the Bronsted base is selected from the group consisting of lithium alkyl, sodium alkyl, potassium alkyl; and Y is halogen. 9. Solid catalyst component comprising the diimino-complex according to claims 1-6 and a porous inorganic solid. 10. Solid catalyst component according to claim 9 characterized in that the porous inorganic solid is selected from the group comprising: silica, alumina, silica-alumina, aluminium phosphates and mixtures thereof. 11. Solid catalyst component according to claim 10 wherein the porous inorganic solid is calcined silica. 12. Solid catalyst component according to claim 10 wherein the porous inorganic solid is silica previously treated with alumoxane. 13. Process for the preparation of a solid catalyst component comprising the following steps: a) reacting, under anhydrous conditions and inert atmosphere, of a solution of at least one diimino-complex according to claims 1-6, with a support material at a temperature between -20° C and 90 °C; and b) filtering and washing with a solvent, wherein the solvent is an aliphatic or aromatic hydrocarbon or a mixture thereof. 14. Polymerization catalyst comprising the catalyst component according to claims 1-6 and 9-12 and a cocatalyst. 15. Polymerization catalyst according to claim 14, wherein the cocatalyst is selected from the group consisting of: aluminoxanes, alkylaluminiums, boron compounds, or mixtures thereof.
