Functional group

Definition

An atom or group of atom or double or triple bond which specifies the properties of organic compound. Six million organic compound are known.

Chemical class	Group	Formula	Graphical Formula	Prefix	Suffix	Example
Acyl halide	Haloformyl	RCOX		haloformyl-	-oyl halide	Acetyl chloride (Ethanoyl chloride)
Alcohol	Hydroxyl	OH		hydroxy-	-ol	Methanol
Aldehyde	Aldehyde	RCHO		oxo-	-al	:Acetaldehyde (Ethanal)
Alkane	Alkyl	RHn		alkyl-	-ane	Methane
Alkene	Alkenyl	R2C=CR2		alkenyl-	-ene	Ethylene (Ethene)
Alkyne	Alkynyl	RC≡CR'		alkynyl-	-yne	Acetylene (Ethyne)
Amide	Carboxamide	RCONR2		carboamidodo-	-amide	Acetamide (Ethanamide)
Amines	Primary amine	RNH2		amino-	-amine	Methylamine (Methanamine)
	Secondary amine	R2NH		amino-	-amine	Dimethylamine
	Tertiary amine	R3N		amino-	-amine	Trimethylamine
	4° ammonium ion	R4N+		ammonio-	-ammonium	Choline
Azo compound	Azo (Diimide)	RN2R'		azo-	-diazene	Methyl orange
Toluene derivative	Benzyl	RCH2C6H5 RBn		benzyl-	1-(substituent)toluene	Benzyl bromide (1-Bromotoluene)
Carbonate	Carbonate ester	ROCOOR			alkyl carbonate
Carboxylate	Carboxylate	RCOO−		carboxy-	-oate	Sodium acetate (Sodium ethanoate)
Carboxylic acid	Carboxyl	RCOOH		carboxy-	-oic acid	Acetic acid (Ethanoic acid)
Cyanates	Cyanate	ROCN		cyanato-	alkyl cyanate
	Thiocyanate	RSCN		thiocyanato-	alkyl thiocyanate
Ether	Ether	ROR'		alkoxy-	alkyl alkyl ether	Diethyl ether (Ethoxyethane)
Ester	Ester	RCOOR'			-oate	Ethyl butyrate (Ethyl butanoate)
Haloalkane	Halo	RX		halo-	alkyl halide	Chloroethane (Ethyl chloride)
Hydroperoxide (see organic peroxide)	Hydroperoxy	ROOH		hydroperoxy-	alkyl hydroperoxide	Methyl ethyl ketone peroxide
Imine	Primary ketimine	RC(=NH)R'		imino-	-imine
	Secondary ketimine	RC(=NR)R'		imino-	-imine
	Primary aldimine	RC(=NH)H		imino-	-imine
	Secondary aldimine	RC(=NR')H		imino-	-imine
Isocyanide	Isocyanide	RNC		isocyano-	alkyl isocyanide
Isocyanates	Isocyanate	RNCO		isocyanato-	alkyl isocyanate
	Isothiocyanate	RNCS		isothiocyanato-	alkyl isothiocyanate	Allyl isothiocyanate
Ketone	Ketone	RCOR'		keto-, oxo-	-one	Methyl ethyl ketone (Butanone)
Nitrile	Nitrile	RCN		cyano-	alkanenitrile alkyl cyanide	Benzonitrile (Phenyl cyanide)
Nitro compound	Nitro	RNO2		nitro-		Nitromethane
Nitroso compound	Nitroso	RNO		nitroso-		Nitrosobenzene
Peroxide	Peroxy	ROOR		peroxy-	alkyl peroxide	Di-tert-butyl peroxide
Benzene derivative	Phenyl	RC6H5		phenyl-	-benzene	Cumene (2-phenylpropane)
Phosphine	Phosphino	R3P		phosphino-	-phosphane	Methylpropylphosphane
Phosphodiester	Phosphate	HOPO(OR)2		phosphoric acid di(substituent) ester	di(substituent) hydrogenphosphate	DNA
Phosphonic acid	Phosphono	RP(=O)(OH)2		phosphono-	substituent phosphonic acid	Benzylphosphonic acid
Phosphate	Phosphate	ROP(=O)(OH)2		phospho-		Glyceraldehyde 3-phosphate

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