Polymethine
Encyclopedia
Polymethines are compounds made up from an odd number of methine
groups (CH) bound together by alternating single and double bond
s.
Compounds made up from an even number of methine groups are known as polyenes.
Methine
In chemistry, methine is a trivalent functional group CH, derived formally from methane. The methine group consists of a carbon atom bound by two single bonds and one double bond, where one of the single bonds is to a hydrogen...
groups (CH) bound together by alternating single and double bond
Double bond
A double bond in chemistry is a chemical bond between two chemical elements involving four bonding electrons instead of the usual two. The most common double bond, that between two carbon atoms, can be found in alkenes. Many types of double bonds between two different elements exist, for example in...
s.
Compounds made up from an even number of methine groups are known as polyenes.