The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Reaction of metallocenes with thiocyanogen》. Authors are Dove, M. F. A.; Sowerby, D. B..The article about the compound:Bromoferrocenecas:1273-73-0,SMILESS:Br[C-]12[Fe+2]3456789([C-]%10C6=C7C8=C9%10)C1=C3C4=C25).Computed Properties of C10BrFe. Through the article, more information about this compound (cas:1273-73-0) is conveyed.
An Et2O solution of (SCN)2 was added slowly to a solution of ferrocene to give a dark brown, unidentified powder, which was not a simple thiocyanate, although ferricinium ions were present. Using CH2 Cl2 as solvent a darkcolored crystalline product [(C5H5)2Fe]2Fe(NCS)4 precipitated Ir spectra showed strong bands at 3095, 1414, 1010, and 850 cm.-1 characteristic of the ferricinium ion and at 2055, 480, and 262 cm.-1 due to the iron thiocyanate group. The electronic spectrum in a KBr disk showed a strong maximum at 20.3 kK with a shoulder at 15.8 kK. An analogous reaction between cobaltocene and (SCN)2 in Et2 O at room temperature yielded as the main product yellow crystalline cobalticinium thiocyanate as shown by elemental anal., ir and electronic spectra, conductivity, and proton N.M.R.
Although many compounds look similar to this compound(1273-73-0)Computed Properties of C10BrFe, numerous studies have shown that this compound(SMILES:Br[C-]12[Fe+2]3456789([C-]%10C6=C7C8=C9%10)C1=C3C4=C25), has unique advantages. If you want to know more about similar compounds, you can read my other articles.
Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com