Methine group

A methine group or methine bridge is a functional group =CH−. It consists of a carbon bound by one double bond and 2 single bonds, where one of the single bonds is to a hydrogen.

Functional groups

Hydrocarbons
(only C and H)

Alkene
- Vinyl
- Allyl
- 1-Propenyl
- Crotyl
Alkyl
- Methyl
- Ethyl
- Propyl
- Butyl
- Pentyl
Alkyne
Carbene
Methine
Allene
Benzyl
Cumulene
Methylene bridge
Methylene group
Phenyl

Only carbon,
hydrogen,
and oxygen
(only C, H and O)

R-O-R	Epoxide Ether Peroxy Organic Acetal Alkoxy Methoxy Dioxirane Ethylenedioxy Hydroxy Methylenedioxy
carbonyl	Aldehyde Ketone Acyl Acetyl Acryloyl Benzoyl Ynone
carboxy	Carboxyl Acetoxy Carboxylic anhydride Ester Orthoester

Only one
element,
not being
carbon,
hydrogen,
or oxygen
(one element,
not C, H or O)

Nitrogen	Amine Hydrazone Nitrate Nitrile Nitro Azo Carbamate Cyanate Imide Imine Isocyanate Isonitrile Nitrene Nitroso Nitrosooxy Amide Oxime
Phosphorus	Phosphonate Phosphonous
Sulfur	Sulfone Sulfoxide Thial Thioester Thioketone Thiol Disulfide Persulfide Sulfo Sulfonic acid Thionoester Sulfide Sulfino Sulfinyl Sulfonyl Thionyl Thiosulfinate Thiosulfonate Thioxanthate Xanthate
Selenium	Selenol Selenonic acid Seleninic acid Selenenic acid Selone
Tellurium	Tellurol Telluroketone
halo	Fluoroethyl

Other

Sulfonamide
Isothiocyanate
Phosphoramides
Sulfenyl chloride
Thiocyanate

Methine

A Methine group

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