Likhanova, Natalya V. et al. published their research in International Journal of Electrochemical Science in 2011 | CAS: 915358-85-9

1-Butyl-3-vinyl-1H-imidazol-3-ium hexafluorophosphate(V) (cas: 915358-85-9) belongs to imidazole derivatives. Many natural products, especially alkaloids, contain the imidazole ring. These imidazoles share the 1,3-C3N2 ring but feature varied substituents. Imidazole is incorporated into many important biological compounds. The most pervasive is the amino acid histidine, which has an imidazole side-chain. Histidine is present in many proteins and enzymes, e.g. by binding metal cofactors, as seen in hemoglobin.Formula: C9H15F6N2P

Corrosion inhibition of carbon steel in acidic environment by imidazolium ionic liquids containing vinyl-hexafluorophosphate as anion was written by Likhanova, Natalya V.;Olivares-Xometl, Octavio;Guzman-Lucero, Diego;Dominguez-Aguilar, Marco A.;Nava, Noel;Corrales-Luna, Monica;Mendoza, M. Consuelo. And the article was included in International Journal of Electrochemical Science in 2011.Formula: C9H15F6N2P This article mentions the following:

Five imidazolium-type ionic liquids, containing both N1-unsaturated chain and N3-long alkyl saturated chain as cations and hexafluorophosphate as anion (VImCxPF6, x = 4, 8, 12, 18 and 22), were evaluated as corrosion inhibitors for carbon steel SAE 1018 in 1.0 M H2SO4 solution The compounds presented relatively high inhibition efficiencies (∼81-96%) at 100 ppm as confirmed by weight loss tests and polarization curves. Synthesized inhibitors obeyed Langmuir adsorption and behaved as mixed type inhibitors, displaying phys. and chem. adsorption depending on the length of the carbon chain link to N3. Mossbauer anal. of corrosion products mainly determined the presence szomolnokite (FeSO4.H2O), whose content increased with aliphatic chain length suggesting that corrosion inhibition occurred by iron sulfate formation. The most effective compound (VImC12PF6) was the only that displayed the presence of alpha iron, iron hydroxide and rozenite (FeSO4.4H2O) as corrosion products. In the experiment, the researchers used many compounds, for example, 1-Butyl-3-vinyl-1H-imidazol-3-ium hexafluorophosphate(V) (cas: 915358-85-9Formula: C9H15F6N2P).

1-Butyl-3-vinyl-1H-imidazol-3-ium hexafluorophosphate(V) (cas: 915358-85-9) belongs to imidazole derivatives. Many natural products, especially alkaloids, contain the imidazole ring. These imidazoles share the 1,3-C3N2 ring but feature varied substituents. Imidazole is incorporated into many important biological compounds. The most pervasive is the amino acid histidine, which has an imidazole side-chain. Histidine is present in many proteins and enzymes, e.g. by binding metal cofactors, as seen in hemoglobin.Formula: C9H15F6N2P

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem