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Bridged systems, geometrical isomers

We should compare this system with a 1,4-disubstituted cyclohexane such as 4-methylcyclo-hexanecarboxylic acid (see Section 3.4.4). There is a plane of symmetry in this molecule, so there are no chiral centres but geometric isomers exist, allowing cis and trans stereoisomers. The restrictions imposed by bridging have now destroyed any possibility of geometric isomerism. [Pg.117]

In addition, the palladium will preferentially position itself on the sterically less demanding face of an allyl system. Both stereoselectivities are neatly demonstrated by reacting either geometric isomer of 2-ethylidenenorpinane (1) with PdCh, where only a single ir-allylpalladium complex (2) that has a syn configuration is observed and has the Pd trans to the gem-dimethyl bridge (equation 2).32... [Pg.587]

See other pages where Bridged systems, geometrical isomers is mentioned: [Pg.52]    [Pg.43]    [Pg.1534]    [Pg.940]    [Pg.65]    [Pg.1534]    [Pg.1749]    [Pg.1748]    [Pg.285]    [Pg.940]    [Pg.4394]    [Pg.848]    [Pg.78]    [Pg.205]    [Pg.8]    [Pg.172]    [Pg.201]    [Pg.465]    [Pg.852]    [Pg.852]    [Pg.4306]    [Pg.148]   
See also in sourсe #XX -- [ Pg.8 , Pg.9 ]



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Geometric isomers

Geometrical isomers

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