{TAIL ~ The process} 1 for producing {HEAD ~ polypropylene} which comprises polymerizing propylene in the presence of a catalyst comprising magnesium containing solid titanium catalyst component obtained by contacting magnesium chloride, titanium tetrachloride and di 2 ethylhexyl indane 2,3 dicarboxylate triethylaluminum and diphenyldimethoxy silane 
{ TAIL ~ The process } 1 for producing { HEAD ~ polypropylene } which comprises polymerizing propylene in the presence of a catalyst comprising magnesium containing solid titanium catalyst component obtained by contacting magnesium chloride , titanium tetrachloride and di 2 ethylhexyl indane 2,3 dicarboxylate triethylaluminum and diphenyldimethoxy silane
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