SYNTHESIS OF S[(4,7-DIMETHYL-INDEN-L-YL)METHYL]-L,1'-BINAPHTHYL AND ETRAHYDROINDEN1-YL)METHYL]-L,1'-BINAPHTHYLTITANIUM AND TRAHYDROINDEN1-YL)METHYL]-L,1'-BINAPHTHYLZIRCONIUM DICHLORIDES

s[(4,7-dimethyl-inden-1-yl)methyl]-1,1'-binaphthyl and rahydroinden-1- yl)methyl]-1,1'-binaphthyl]titanium and -zirconium dichlorides have be en synthesized from 2,2'-bis(bromomethyl)-1,1'-binaphthylene, 2,2'-Bis (bromomethyl)-1,1'-binaphthylene was alkylated with the lithium salt o f 4,7-dimethylindene to yield 1-(4,7-dimethyl-indenylmethyl)]-1,1'-bin aphthylene (S)-(-)-9. The lithium salt of 9 was metalated with either titanium trichloride fo[owed by oxidation or zirconium tetrachloride t o give titanocene dichloride (S)-(+)-10 and zirconocene dichloride 11. The known complexes ansa-[2,2'-bis[( 1-indenyl)methyl]-1,1'-binaphthy l]titanium and -zirconium dichlorides were formed and hydrogenated to rahydroinden-1-yl)methyl]-1,1'-binaphthyl]titanium and -zirconium dich lorides 12 and 14 or to ,6,6',7,7',8,8'-octahydro-1,1'-binaphthyl]tita nium dichloride 13 whose solid state structure was determined by X-ray crystallography. Complex 13 adopts a C-1-symmetrical conformation in the solid state, but is conformationally mobile in solution, exhibitin g C-2-symmetry in its room temperature NMR spectra.