Electric Literature of C21H25BF4N2. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 1,3-Dimesityl-1H-imidazol-3-ium tetrafluoroborate, is researched, Molecular C21H25BF4N2, CAS is 286014-53-7, about NHC adducts of tantalum amidohalides: the first example of NHC abnormally coordinated to an early transition metal.
The reaction of Ta(NMe2)5 with NHC·HBF4 (NHC = IMes and SIMes) leads to new carbene adducts of the mixed TaV amidofluoride, [(NHC)TaF3(NMe2)2]. On the contrary, the reaction of Ta(NMe2)5 with IMes·HCl gives a complex mixture, where [(IMes)TaCl2(NMe2)3] is identified as one of the products. This is the 1st example of abnormal NHC coordination to an early transition metal.
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Bromide – Wikipedia,
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