Radical name |
Formula |
Based on rule no. |

Icosyl | A-1.2 | |

Imidazolidinyl | B-2.12, B-5.11 | |

Imidazolinyl | B-2.12, B-5.11 | |

Imidazolyl | B-2.12, B-5.11 | |

Imino | , | C-815.1, C-815.3 |

Iminomethylamino | C-951.4 | |

Indacenyl | A-21.1, A-24.2 | |

Indanyl | A-23.1, A-24.2 | |

Indazolyl | B-2.11, B-5.11 | |

Indenyl | A-21.1, A-24.2 | |

Indolinyl | B-2.12, B-5.11 | |

Indolinylidene (3- shown) |
B-5.12 | |

Indolizinyl | B-2.11, B-5.11 | |

Indolyl | B-2.11, B-5.11 | |

Iodo | C-10.1, C-102.1 | |

Iodoformyl | C-481.2 | |

Iodonio | C-82.1 | |

iodoso, Iodosylsee |
||

Iodosyl, replacing iodoso |
C-10.1, C-106.1 | |

iodoxy, Iodylsee |
||

Iodyl, replacing iodoxy |
C-10.1, C-106.1 | |

Isobenzofuranyl | B-2.11, B-5.11 | |

Isobutoxy ( unsubstituted only) |
C-205.1 | |

Isobutyl ( unsubstituted only) |
A-2.25 | |

Isobutylidene ( unsubstituted only) |
A-4.1 | |

Isobutylidyne ( unsubstituted only) |
A-4.1 | |

Isobutyryl ( preferred to 2-methylpropanoyl) ( unsubstituted only) |
C-404.1 | |

Isocarbonohydrazido | (and tautomers) |
C-983.1 |

Isochromanyl | B-2.12, B-5.11 | |

Isocoumarinyl | B-5.11, C-473.1 | |

Isocrotonoyl ( preferred to cis-2-butenoyl) |
( cis) |
C-404.1 |

Isocyanato | C-833.1 | |

Isocyano | C-833.1 | |

Isohexyl ( unsubstituted only) |
A-2.25 | |

Isohexylidene ( unsubstituted only) |
A-4.1 | |

Isohexylidyne ( unsubstituted only) |
A-4.1 | |

Isoindolinyl | B-2.12, B-5.11 | |

Isoindolyl | B-2.11, B-5.11 | |

Isoleucyl | C-421.1 | |

Isonicotinoyl ( preferred to 4-pyridinecarbonyl) |
(4-) |
C-404.1 |

Isoxazolyl | B-2.11, B-5.11 | |

Isopentyl ( unsubstituted only) |
A-2.25 | |

Isopentylidene ( unsubstituted only) |
A-4.1 | |

Isopentylidyne ( unsubstituted only) |
A-4.1 | |

Isopentyloxy ( unsubstituted only) |
C-205.1 | |

Isophthaloyl ( preferred to 1,3-benzenedicarbonyl) |
( m-) |
C-404.1 |

Isopropenyl ( replacing 1-methylvinyl) ( unsubstituted only) |
A-3.5 | |

Isopropoxy ( unsubstituted only) |
C-205.1 | |

Isopropyl ( unsubstituted only) |
A-2.25 | |

p-Isopropylbenzoyl |
C-404.1 | |

Isopropylbenzyl | A-13.3 | |

Isopropylidene | A-4.1 | |

Isoquinolyl | B-2.11, B-5.11 | |

Isoselenocyanato | C-833.1 | |

Isosemiccarbazido | (and tautomers) |
C-983.1 |

Isothiazolyl | B-2.11, B-5.11 | |

Isothiocyanato | C-833.1 | |

Isothioureido | , | C-972.2, C-974.1 |

Isoureido | , | C-972.2 |

Isovaleryl ( preferred to 3-methylbutanoyl) ( unsubstituted only) |
C-404.1 | |

Isoviolanthrenyl | A-23.1, A-24.2 | |

Lactoyl ( preferred to 2-hydroxypropanoyl) |
C-411.1 | |

Lanthionyl | C-421.1 | |

Lauroyl ( unsubstituted only) |
C-404.1 | |

Leucyl | C-421.1 | |

Linalyl | A-75.1 | |

Lysyl | C-421.1 |

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