Benzylidene compounds
Encyclopedia
Benzylidene compounds are alkene
Alkene
In organic chemistry, an alkene, olefin, or olefine is an unsaturated chemical compound containing at least one carbon-to-carbon double bond...

 derivatives of benzene
Benzene
Benzene is an organic chemical compound. It is composed of 6 carbon atoms in a ring, with 1 hydrogen atom attached to each carbon atom, with the molecular formula C6H6....

.

They are primarily divided into two groups:
  • Styrenes (one benzene
    Benzene
    Benzene is an organic chemical compound. It is composed of 6 carbon atoms in a ring, with 1 hydrogen atom attached to each carbon atom, with the molecular formula C6H6....

    )
  • Stilbene
    Stilbene
    -Stilbene, is a diarylethene, i.e., a hydrocarbon consisting of a trans ethene double bond substituted with a phenyl group on both carbon atoms of the double bond. The name stilbene is derived from the Greek word stilbos, which means shining....

    s (two benzene
    Benzene
    Benzene is an organic chemical compound. It is composed of 6 carbon atoms in a ring, with 1 hydrogen atom attached to each carbon atom, with the molecular formula C6H6....

    s)


Benzylidene is also used to describe a type of protecting group in synthetic organic chemistry of the form PhCH(R)2 For example, 4,6-O-benzylidene-glucopyranose is a glucose molecule whose 4- and 6-OH groups are protected by being bound to a benzylic carbon, forming a benzyl acetal.
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