Reactivity of the dinuclear fulvalene cyclopentadienyl zirconium cationic species [{Zr(
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چکیده
The dinuclear cationic zirconium compound [{Zr( -C5H5)}2( -CH2)( -Cl)( -C5H4-C5H4)][BMe(C6F5)3] 1 reacts in dichloromethane at −78 °C with three equivalents of RNC (R= Bu, 2,6-Me2C6H3) via insertion into the Zr-methylene bond to give the new zirconium cationic species [{Zr( -C5H5)}2(Cl)(CNBu){ -[ -CN(Bu)-CH2-CN(Bu)}( -C5H4-C5H4)][BMe(C6F5)3] 2 and [{Zr( -C5H5)}2(Cl){CN(2,6-Me2C6H3)}[ -{CN(2,6-Me2C6H3)}-CH2-{CN(2,6-Me2C6H3)}]( -C5H4-C5H4)][BMe(C6F5)3] 3, whereas reaction with CO affords the ketene compound [{Zr( -C5H5)}2( -Cl){ -OC( CH2)}( C5H4-C5H4)][BMe(C6F5)3] 4. The new complexes reported herein were characterized by elemental analysis and IR and NMR spectroscopy. © 2001 Published by Elsevier Science B.V.
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