List of Radical Names

Bring the power of IUPAC naming to your desktop!

ACD/Name (Chemist Version) offers a standardized set of features for quick and simple generation of IUPAC names, and structures from names. It is a streamlined version of our popular ACD/Name software.

View a full description and pricing on our web store.

List of Radical Names From "I" to "L"

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,
see Iodosyl

Iodosyl,
replacing iodoso C-10.1, C-106.1

iodoxy,
see Iodyl

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

This HTML reproduction of Sections A, B and C of IUPAC "Blue Book" is as close as possible to the published version [see Nomenclature of Organic Chemistry, Sections A, B, C, D, E, F, and H, Pergamon Press, Oxford, 1979. Copyright 1979 IUPAC.] If you need to cite these rules please quote this reference as their source.

Published with permission of the IUPAC by Advanced Chemistry Development, Inc., www.acdlabs.com, +1(416)368-3435 tel, +1(416)368-5596 fax. For comments or suggestions please contact webmaster@acdlabs.com


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, see Iodosyl
Iodosyl, replacing iodoso		C-10.1, C-106.1
iodoxy, see Iodyl
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