Abstract
Nine different substituted cyclopentadienyl ligands, which have substituents that may either chelate or bridge to second metal center, have been prepared from nucleophilic substitution reactions of esters or alkyl halides with NaCp. The sodium or thallium salts of these ligands were isolated as solids and characterized by 1H NMR. The alkyl halide and NaCp reaction proved to yield the purer salts of the ligands because of the milder reaction conditions. These salts were reacted futher with Mn(CO) 5Br to form the corresponding manganese tricarbonyl derivatives (i.e. (C 5H 4R)Mn(CO) 3; where R = C(O)CH 2OCH 3, C(O)CH 2SCH 3, C(O)CH 2CH 2SCH 3, CH 2CO 2CH 3, CH 2CO 2CH 2CH 3, CH 2CH 2CO 2CH 3, CH 2CH 2CO 2CH 2CH 3, CH 2CH 2O 2CCH 3, and CH 2CH 2OCH 3) and Na(C 5H 4C(O)CH 2OCH 3) was reacted with Co 2(CO) 8 to form (C 5H 4C(O)CH 2OCH 3)Co(CO) 2. The manganese and cobalt compounds were characterized by elemental analysis, IR, 1H, and 13C NMR spectra.
Published Version
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