. 2020 May 11;6(5):e03939. doi: 10.1016/j.heliyon.2020.e03939

Table 4.

Percentage inhibition efficiency for different quinoxaline derivatives in 1 M HCl (the concentration used is 10⁻³ M).

Quinoxaline derivative	Highest inhibition efficiency (%)^a	Metal exposed	Reference
(E)-3-(4-methoxystyryl)-7-methylquinoxalin-2(1H)-one	87.0	Mild steel	[31]
2-(4-methoxyphenyl)-7-methylthieno [3,2-b] quinoxaline	94.0	Mild steel	[31]
6-methylquinoxaline-2,3(1H,4H)-dione	92.6	Carbon steel	[32]
2-(8-hydroxyquinoxalin-5-yl)acetonitrile	91.0	Carbon steel	[33]
(E)-3-(4-methylstyryl)quinoxalin-2(1H)-one	91.1	Mild steel	[34]
(E)-3-(4chlorostyryl)quinoxalin-2(1H)-one	92.8	Mild steel	This work
(E)-3-(4-(dimethylamino)quinoxalin-2(1H)-one	96.4	Mild steel	This work

The inhibition efficiency values were determined utilizing EIS measurements at 303 K after 1/2h of immersion.