| abstract |
A solid catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor of formula (I), where each Q is a group –COOR 1 in which R 1 is selected from C 1 -C 15 hydrocarbon groups, optionally containing a heteroatom selected from halogen, P, S, N,O; or a group –CON(R 2 ) 2 in which R 2 groups, equal to or different from each other, are hydrogen or R 1 groups which can be fused together to form one or more cycles, and A is a bivalent bridging group with the proviso that Q groups cannot be simultaneously a group – COOR 1 or –CON(R 2 ) 2 . |