Searching by Functional Groups and Common Heterocyclic Rings | Functional Groups Available | Functional Group Class Terms | Ring Terms | Searching by CAS Registry Number
Functional Groups Available in CASREACT
Chemical Abstracts Service, 1993. Reproduced for educational purposes with permission from CAS, a Division of the American Chemical Society.
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A
- Acetal
- Acetal, Hemi USE Hemiacetal
- Acetal, Thio USE Thioacetal
- Acetyl
- Acid Halide
- Acid, Peroxy USE Peroxy Acid
- Acid, Unsatd USE Unsatd Acid
- Acid, Unsaturated USE Unsaturated Acid
- Acyclic Alkene
- Acyclic Ketone
- Acyl metal
- Alcohol, Cyclic USE Cyclic Alcohol
- Alcohol, Primary USE Primary Alcohol
- Alcohol, Secondary USE Secondary Alcohol
- Alcohol, Tertiary USE Tertiary Alcohol
- Aldehyde, Unsatd USE Unsatd Aldehyde
- Aldehyde, Unsaturated USE Unsaturated Aldehyde
- Alkene, Cyclic USE Cyclic Alkene
- Alkene, Pi USE Pi-Alkene
- Alkyne, Pi USE Pi-Alkyne
- Allyl Halide
- Allyl, Pi USE Pi-Allyl
- Amide
- Amide, Sulfon USE Sulfonamide
- Amide, Thio USE Thioamide
- Amide, Unsatd USE Unsatd Amide
- Amide, Unsaturated USE Unsaturated Amide
- Amidine
- Amine, Chlor USE Chloramine
- Amine, En USE Enamine
- Amine, Hydroxyl USE Hydroxylamine
- Amine, Notros USE Notrosamine
- Amine Oxide
- Amine, Primary USE Primary Amine
- Amine, Secondary USE Secondary Amine
- Amine, Tertiary USE Tertiary Amine
- Ammonium, Quaternary USE Quarternary Ammonium
- Anhydride
- Arene, Metal USE Metal Arene
- Aryl Halide
- Arylsulfonyl
- Azide
- Azide, Hydr USE Hydrazide
- Azine
- Azine, Hydr USE Hydrazine
- Aziridine
- Azo
- Azo, Di USE Diazo
- Azone, Hydr USE Hydrazone
- Azonium, Di USE Diazonium
- Azoxy
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B
- Bond, Metal-Metal USE Metal-Metal Bond
C
- Carbamate
- Carbene, Metal USE Metal Carbene
- Carbocycle, Metallo USE Metallocarbocycle
- Carbonate
- Carbonyl, Metal USE Metal Carbonyl
- Carbonyl, Mu- USE Mu-Carbonyl
- Carbonyl, Thio USE Thiocarbonyl
- Carboxy, Thio USE Thiocarboxy
- Carboxylate
- Carboxylic
- Cephen
- Chloramine
- Cyanimide
- Cyanate
- Cyanate, Iso USE Isocyanate
- Cyanate, Isothio USE Isothiocyanate
- Cyanate, Thio USE Thiocyanate
- Cyanohydrin
- Cyclic Alcohol
- Cyclic Alkene
- Cyclic Ketone
- Cyclopentadienyl, Metal USE Metal Cyclopentadienyl
- Cyclopropyl
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D
- Diazo
- Diazonium
- Diene
- Dienyl, Metal Cyclopenta USE Metal Cyclopentadienyl
- Dihalide, Gem USE Gem-Dihalide
- Dihalide, Vic USE Vic-Dihalide
- Diimide
- Disulfide
E
- Enamine
- Enol
- Enol Ether
- Enol Ether, Silyl USE Silyl Enol Ether
- Enyne
- Episulfide
- Epoxide
- Ester, Ortho- USE Ortho-Ester
- Ester, Peroxy USE Peroxy Ester
- Ester, Unsatd USE Unsatd Ester
- Ester, Unsaturated USE Unsaturated Ester
- Ether
- Ether, Enol USE Enol Ether
- Ether, Imino USE Imino Ether
- Ether, Silyl Enol USE Silyl Enol Ether
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F
- Formate, Halo USE Haloformate
G
- Gem-Dihalide
- Glycol
- Group, P-N USE P-N Group
- Group, P-O USE P-O Group
- Group, P-S USE P-S Group
- Group, S-O USE S-O Group
- Group, Se USE Se Group
- Group, Te USE Te Group
- Guanidine
H
- Halide, Acid USE Acid Halide
- Halide, Allyl USE Allyl Halide
- Halide, Aryl USE Aryl Halide
- Halide, Gem-Di USE Gem-Dihalide
- Halide, Metal USE Metal Halide
- Halide, Sulfenyl USE Sulfenyl Halide
- Halide, Sulfinyl USE Sulfinyl Halide
- Halide, Sulfonyl USE Sulfonyl Halide
- Halide, Vic-Di USE Vic-Dihalide
- Halide, Vinyl USE Vinyl Halide
- Haloformate
- Halohydrin
- Hemiacetal
- Hydrazide
- Hydrazine
- Hydrazone
- Hydride, An USE Anhydride
- Hydride, Metal USE Metal Hydride
- Hydrin, Cyano USE Cyanohydrin
- Hydrin, Halo USE Halohydrin
- Hydroperoxide
- Hydroxylamine
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I
- Imide
- Imide, Cyan USE Cyanimide
- Imide, Di USE Diimide
- Imine
- Imine, Keten USE Ketenimine
- Imino Ether
- Isocyanate
- Isonitrile
- Isothiocyanate
K
- Ketal
- Ketal, Thio USE Thioketal
- Ketene
- Ketenimine
- Ketone, Cyclic USE Cyclic Ketone
- Ketone, Unsatd USE Unsatd Ketone
- Ketone, Unsaturated USE Unsaturated Keton
L
- Lactam
- Lactone
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M
- Mesyl
- Metal Arene
- Metal Carbene
- Metal Carbonyl
- Metal Cyclopentadienyl
- Metal Halide
- Metal Hydride
- Metal-Metal Bond
- Metal Nitrogen
- Metal Nitrosyl
- Metal, Organo USE Organometal
- Metal Phosphine
- Metal Sulfur
- Metallocarbocycle
- Mu-Carbonyl
N
- Nitrile
- Nitrile, Iso USE Isonitrile
- Nitrile Oxide
- Nitrile, Unsatd USE Unsatd Nitrile
- Nitrile, Unsaturated USE Unsaturated Nitrile
- Nitrite
- Nitro
- Nitrogen, Metal USE Metal Nitrogen
- Nitrone
- Notrosamine
- Nitroso
- Nitrosyl, Metal USE Metal Nitrosyl
- Nitroxide
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O
- O-Quinone
- Organometal
- Ortho-Ester
- Oxide, Amine USE Amine Oxide
- Oxide, Ep USE Epoxide
- Oxide, Hydroper USE Hydroperoxide
- Oxide, Nitr USE Nitroxide
- Oxide, Nitrile USE Nitrile Oxide
- Oxide, Per USE Peroxide
- Oxime
- Oxonium
P
- P-N Group
- P-O Group
- P-Quinone
- P-S Group
- Penam
- Pentadienyl, Metal Cyclo USE Metal Cyclopentadienyl
- Peroxide
- Peroxide, Hydro USE Hydroperoxide
- Peroxy Acid
- Peroxy Ester
- Phenol
- Phenol, Thio USE Thiophenol
- Phosphate
- Phosphine, Metal USE Metal Phosphine
- Phosphite
- Phosphonate
- Phosphonium
- Phosphorus Ylide
- Pi-Alkene
- Pi-Alkyne
- Pi-Allyl
- Primary Alcohol
- Primary Amine
- Propyl, Cyclo USE Cyclopropyl
- Purine
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Q
- Quarternary Ammonium
- Quinone, O- USE O-Quinone
- Quinone, P- USE P-Quinone
S
- S-O Group
- Se Group
- Secondary Alcohol
- Secondary Amine
- Selenide
- Selenol
- Silyl
- Silyl Enol Ether
- Sulfenyl Halide
- Sulfide
- Sulfide, Di USE Disulfide
- Sulfide, Epi USE Episulfide
- Sulfinate
- Sulfinyl Halide
- Sulfonamide
- Sufone
- Sulfonyl, Aryl USE Arylsulfonyl
- Sulfonyl Halide
- Sulfonyloxy
- Sulfoxide
- Sulfur, Metal USE Metal Sulfur
- Sulfur Ylide
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T
- Te Group
- Tertiary Alcohol
- Tertiary Amine
- Thioacetal
- Thioamide
- Thiocarbonyl
- Thiocarboxy
- Thiocyanate
- Thiocyanate, Iso USE Isothiocyanate
- Thioketal
- Thiol
- Thione
- Thiophenol
- Thiourea
- Triazene
- Trihalide
U
- Unsatd Acid
- Unsatd Aldehyde
- Unsatd Amide
- Unsatd Ester
- Unsatd Ketone
- Unsatd Nitrile
- Unsaturated Acid
- Unsaturated Aldehyde
- Unsaturated Amide
- Unsaturated Ester
- Unsaturated Ketone
- Unsaturated Nitrile
- Urea
- Urea, Thio USE Thiourea
V
- Vic-Dihalide
- Vinyl Halide
Y
- Ylide, Sulfur USE Sulfur Ylide
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