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Radical name | Formula | Based on rule no. |
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Palmitoyl (unsubstituted only) |
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C-404.1 |
Pentacenyl | ![]() |
A-21.1, A-24.2 |
Pentacontyl | ![]() |
A-1.2 |
Pentacosyl | ![]() |
A-1.2 |
Pentadecanoyl | ![]() |
C-403.1 |
Pentadecyl | ![]() |
A-1.2 |
Pentafluorothio | ![]() |
C-621.2 |
Pentalenyl | ![]() |
A-21.1, A-24.2 |
Pentamethylene | ![]() |
A-4.2 |
pentanedioyl, see Glutaryl |
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pentanoyl, see Valeryl |
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Pentapheneyl (from pentaphene) |
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A-21.1, A-24.2 |
Pentazolyl | ![]() |
B-1, B-5.11 |
Pentenyl (2- shown) | ![]() |
A-3.5 |
2-Penten-4-ynyl | ![]() |
A-3.5 |
Pentyl (replacing amyl) |
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A-1.2 |
tert-Pentyl (unsubstituted only) |
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A-2.25 |
Pentylidene | ![]() |
A-4.1 |
Pentylidyne | ![]() |
A-4.1 |
Pentyloxy | ![]() |
C-205.1 |
Perchloryl | ![]() |
C-10.1, C-106.2 |
Perimidinyl | ![]() |
B-2.11, B-5.11 |
Perylenyl | ![]() |
A-21.1, A-24.2 |
Phenacyl | ![]() |
C-318.1 |
Phenacylidene | ![]() |
C-318.1 |
Phenalenyl | ![]() |
A-21.1, A-24.2 |
Phenanthridinyl | ![]() |
B-2.11, B-5.11 |
Phenanthrolinyl | ![]() |
B-2.11, B-5.11 |
Phenanthryl | ![]() |
A-24.2 |
Phenanthrylene | ![]() |
A-24.4 |
Phenarsazinyl | ![]() |
B-2.11, B-5.11 |
Phenazinyl | ![]() |
B-2.11, B-5.11 |
Phenethyl | ![]() |
A-13.3 |
Phenetidino (o-, m-, or p-) | ![]() |
C-811.4 |
Phenothiazinyl | ![]() |
B-2.11, B-5.11 |
Phenoxathiinyl | ![]() |
B-2.11, B-5.11 |
Phenoxazinyl | ![]() |
B-2.11, B-5.11 |
Phenoxy | ![]() |
C-205.1 |
Phenyl | ![]() |
A-13.1 |
Phenylacetyl | ![]() |
C-12.7, C-404.1 |
Phenylazo | ![]() |
C-912.3 |
Phenylazoxy | ![]() |
C-913.1 |
Phenylcarbrmoyl | ![]() |
C-431.2 |
Phenylene | ![]() |
A-11.6 |
Phenylenebisazo | ![]() |
C-912.5 |
Phenylimino | ![]() |
C-815.3 |
2-phenylpropanoyl, see Hydratropoyl |
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3-phenylpropenoyl, see Cinnamoyl |
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3-Phenylpropyl | ![]() |
A-61.2 |
Phenylsulfamoyl | ![]() |
C-661.2 |
Phenylsulfinyl | ![]() |
C-631.1 |
Phenylsulfonyl | ![]() |
C-631.1 |
Phenylsulfonylamino | ![]() |
C-641.7, C-641.8, C-823.1 |
Phenylthio | ![]() |
C-514.1 |
3-Phenylureido | ![]() |
C-971.2 |
Phthalamoyl | ![]() |
C-431.1, C-431.2 |
Phthalazinyl | ![]() |
B-2.11, B-5.11 |
Phthalidyl | ![]() |
B-5.11, C-473.1 |
Phthalidylidene | ![]() |
B-5.12, C-473.1 |
Phthalimido | ![]() |
C-827.2 |
Phthaloyl (preferred to 1,2-benzenedicarbonyl) |
![]() (o-) |
C-404.1 |
Phytyl [for (E)-(7R,11R)-3,7,11,15-tetramethyl- 2-hexadecenyl] |
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A-75.1 |
Picenyl | ![]() |
A-21.1, A-24.2 |
Picryl | ![]() |
C-202.2 |
Pimeloyl (unsubstituted only) |
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C-404.1 |
Pinanyl | ![]() |
A-72.1, A-75.2 |
Pinanylene | ![]() |
A-72.1, A-75.2 |
Pinanylidene | ![]() |
A-72.1, A-75.2 |
Piperazinyl | ![]() |
B-2.12, B-5.11 |
Piperidino (1-position only) | ![]() |
B-2.12, B-5.11 |
Piperidyl | ![]() |
B-2.12, B-5.11 |
Piperdylidene | ![]() |
B-5.12 |
Piperonyl | ![]() |
(cfC-411.1) |
Piperonylidene | ![]() |
(cfC-411.1) |
Piperonyloyl (preferred to 3,4-methylenedioxybenzoyl) |
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C-411.1 |
Pivaloyl (unsubstituted only) |
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C-404.1 |
Pleiadenyl | ![]() |
A-21.1, A-24.2 |
Polythio | ![]() |
C-515.1 |
Prolyl | ![]() |
C-421.1 |
propanedioyl, see Malonyl |
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Propane-1,3-diyl-2-ylidene | ![]() |
A-4.5 |
Propane-1,2,3-triyl | ![]() |
A-4.5 |
propanoyl, see Propionyl |
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Propan-1-yl-3-ylidene | ![]() |
A-4.4 |
propargyl, see 2-Propynyl |
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propenpyl, see Acryloyl |
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1-Propenyl | ![]() |
A-3.5 |
2-propenyl, see Allyl |
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Propenylene | ![]() |
A-4.3 |
Propioloyl (preferred to propynoyl) |
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C-404.1 |
Propionamido | ![]() |
C-823.1 |
Propionyl (preferred to propanoyl) |
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C-404.1 |
Propionylamino | ![]() |
C-823.1 |
Propionyloxy | ![]() |
C-463.3 |
Propoxy | ![]() |
C-205.1 |
Propyl | ![]() |
A-1.2 |
Propylene | ![]() |
A-4.2 |
Propylidene | ![]() |
A-4.1 |
Propylidyne | ![]() |
A-4.1 |
propynoyl, see Propioloyl |
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1-Propynyl | ![]() |
A-3.5 |
2-Propynyl | ![]() |
A-3.5 |
Protocatechuoyl (preferred to 3,4-dihydroxybenzoyl) |
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C-411.1 |
Pteridinyl | ![]() |
B-2.11, B-5.11 |
Purinyl | ![]() |
B-2.11, B-5.11 |
Pyranthrenyl | ![]() |
A-21.1, A-24.2 |
Pyranyl | ![]() |
B-2.11, B-5.11 |
Pyranylidene | ![]() |
B-2.11, B-5.12 |
Pyrazinyl | ![]() |
B-2.11, B-5.11 |
Pyrazolidinyl | ![]() |
B-2.12, B-5.11 |
Pyrazolinyl | ![]() |
B-2.12, B-5.11 |
Pyrazolyl | ![]() |
B-2.11, B-5.11 |
Pyrenyl | ![]() |
A-21.1, A-24.2 |
Pyridazinyl | ![]() |
B-2.11, B-5.11 |
2-Pyridinecarbonyl | ![]() |
C-401.2, C-403.2 |
3-pyridinecarbonyl, see Nicotinoyl |
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4-pyridinecarbonyl, see Isonicotinoyl |
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Pyridinio | ![]() |
C-82.1, C-85.1 |
Pyridyl | ![]() |
B-2.11, B-5.11 |
2-Pyridylcarbonyl | ![]() |
C-403.2 |
Pyridyloxy | ![]() |
C-205.1 |
Pyrimidinyl | ![]() |
B-2.11, B-5.11 |
Pyrrolidinyl | ![]() |
B-2.12, B-5.11 |
Pyrrolinyl | ![]() |
B-2.12, B-5.11 |
Pyrrolyl | ![]() |
B-2.11, B-5.11 |
Pyruvoyl | ![]() |
C-416.3 |
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