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| # | Species | Formula |
| 1921 | Trifluoroiodomethane (Geo) | CF3I | |
| 1922 | Trifluoroiodomethane | CF3I | |
| 1923 | 1,1,1-Trifluoro-2-iodoethane | C2H2F3I | |
| 1924 | Iodine pentafluoride (Geo) | F5I | |
| 1925 | Iodine pentafluoride | F5I | |
| 1926 | Pentafluoroiodobenzene | C6F5I | |
| 1927 | Iodomethyl methyl sulfide | C2H5SI | |
| 1928 | 1,2-Chloroiodoethane | C2H4ClI | |
| 1929 | 1-Chloro-4-iodobutadiene | C4H4ClI | |
| 1930 | 1-Bromo-4-iodobutadiene | C4H4BrI | |
| 1931 | 1-Bromo-4-iodobutadiene (Geo) | C4H4BrI | |
| 1932 | Diiodomethane (Geo) | CH2I2 | |
| 1933 | Diiodomethane | CH2I2 | |
| 1934 | Diiodoacetylene | C2I2 | |
| 1935 | E-1,2-Diiodoethylene (Geo) | C2H2I2 | |
| 1936 | Z-1,2-Diiodoethylene (Geo) | C2H2I2 | |
| 1937 | E-1,2-Diiodoethene | C2H2I2 | |
| 1938 | Z-1,2-Diiodoethene | C2H2I2 | |
| 1939 | 1,2-Diiodoethane | C2H4I2 | |
| 1940 | 1,2-Diiodopropane | C3H6I2 | |
| 1941 | 1,3-Diiodopropane | C3H6I2 | |
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