Example 1
1,3-Di-tert-butylimidazole bromide (0.26 g, 1.0 mmol) was added into the tetrahydrofuran solution of ferric tribromide (0.27 g, 0.9 mmol), reacting at 60° C. for 24 h. When the reaction was complete, the solvent was removed under vacuum, washed with hexane, dried, extracted with tetrahydrofuran, and centrifuged to collect the supernatant. Hexane was added to the supernatant to precipitate to obtain a red-brown crystal at room temperature, a yield of 89%.
Elemental Analysis
The complex [(tBuNCHCHNtBu)CH][FeBr4] existed in the form of ion pairs, where [FeBr4]− was characterized by Raman spectroscopy and it was found to have a characteristic peak at 204 cm−1.
The cationic part of the complex, [(tBuNCHCHNtBu)CH]+, was characterized by mass spectrometry and found to have a molecular ion peak at 181.1699. The theoretic molecular ion peak is at 181.1699. The measured results are consistent with the theoretic value.
It was confirmed that the obtained compound was the target compound, and the chemical structural formula is as follows:
