Abstract
Complete demethylation of Cp 2Ti(CH 3) 2 in dichloromethane with 2 M equivalent of [η 5-(C 5H 4COOH)]Cr(CO) 2NO ( 5), [η 5-(C 5H 4COOH)]Cr(NO) 2X] (X = Cl 6, X = I 7), and [η 5-(C 5H 4COOH)]W(CO) 3CH 3 ( 8); gives Cp 2Ti{[OC(O)C 5H 4]Cr(CO) 2NO} 2 ( 13), Cp 2Ti{[OC(O)C 5H 4]Cr(NO) 2Cl} 2 ( 14), Cp 2Ti{[OC(O)C 5H 4]Cr(NO) 2I} 2 ( 15),and Cp 2Ti{[OC(O)C 5H 4]W(CO) 3CH 3} 2 ( 16), respectively. The chemical shifts of C(2)–C(5) carbon atoms of compounds 13–15 have been assigned using two-dimensional HetCOR NMR spectroscopy. The assigned chemical shifts were compared with the NMR data of their analogues of ferrocene, and the opposite correlation on the assignments was observed for cynichrodenoyl moieties.
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