Catalyst component for olefin polymerization and catalyst comprising the same

A catalyst component for olefin polymerization, comprising magnesium, titanium, a halogen and an electron donor compound (a), wherein said electron donor compound (a) is at least one selected from the group consisting of dibasic ester compounds of the formula (I):

• wherein R1 and R′ groups, which may be identical or different, are selected from the group consisting of substituted or unsubstituted, C1-C20 linear or branched alkyl, C3-C20 cycloalkyl, C6-C20 aryl, C7-C20 alkaryl, C7-C20 aralkyl, C2-C10 alkenyl, and C10-C20 condensed aromatic group;
• A is a bivalent linking group with chain length between two free radicals being 1-10 carbon atoms, where one or more carbon atoms of the bivalent linking group are optionally replaced by a hetero-atom selected from the group consisting of nitrogen, oxygen, sulfur, silicon, and phosphorus, and one or more carbon atoms and optional hetero-atom(s) of the bivalent linking group optionally carry a substituent selected from the group consisting of linear or branched alkyl, cycloalkyl, aryl, alkaryl, aralkyl, alkenyl, condensed aromatic group, and ester group, said substituents having from 1 to 20 carbon atoms, and two or more of said substituents being optionally linked together to form a saturated or unsaturated monocyclic or polycyclic ring.