| Popis: |
Sulfur dioxide reacts at −78°C with Na + [η 5 -C 5 H 5 Fe(CO) 2 ] − , prepared by the reduction of [η 5 -C 5 H 5 Fe(CO) 2 ] 2 with sodium amalgam in tetrahydrofuran, to give a red solution containing a species which can be alkylated with RX to η 5 -C 5 H 5 Fe(CO) 2 S(O) 2 R. The alkylation reaction with CH 3 I affords both η 5 C 5 H 5 Fe(CO) 2 S(O) 2 CH 3 and η 5 -C 5 H 5 Fe(CO) 2 I. The nature of this solution and the possible existence of the anion [η 5 -C 5 H 5 Fe(CO) 2 SO 2 ] − therein are discussed. Upon warming to room temperature and chromatography, the solutions of Na + [η 5 -C 5 H 5 Fe(CO) 2 ] − and SO 2 afford the isolable ironsulfur dioxide complexes, [η 5 -C 5 H 5 Fe(CO) 2 ] 2 SO 2 , [η 5 -C 5 H 5 Fe(CO)] 2 (CO)SO 2 , and [η 5 -C 5 H 5 Fe(CO) 2 SO 2 ] 2 . The characterization and properties of the first two compounds are described. |
