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more xamples wud b lyk dis
bicyclo[4.3.2]undecane
bicyclo[4.1.0]heptane
bicyclo[4.4.0]decane, aka decalin
7,7-dimethylbicyclo[2.2.1]heptane
4-ethyl-2-isopropylbicyclo[4.1.0]heptane
1,9-dimethylbicyclo[4.2.1]nonane
2,6,6-trimethylbicyclo[3.1.1]heptane
hope i helpd u...............
hii
A class of saturated compounds consisting of two rings only, having two or more atoms in common,
containing at least one hetero atom, and that take the name of an open chain hydrocarbon containing
the same total number of atoms.
in much simpler way
A bicyclic molecule is a molecule that features two fused rings. Bicyclic molecules occur in widely in organic and inorganic compounds.
Fusion of the rings can occur in three ways:
1. Across a bond between two atoms - for example, decalin (also known as bicyclo[]decane), has a C-C bond shared between two cyclohexane rings;
2. Across a sequence of atoms (bridgehead) - for example, norbornane (also known as bicyclo[]heptane), can be viewed as a pair of cyclopentane rings that share three of the five carbon atoms; or
3. At a single atom (spirocyclic, forming a spiro compound)
Singly fused rings are the most common, and spiro rings are the least common.
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A class of saturated compounds consisting of two rings only, having two or more atoms in common, containing at least one hetero atom, and that take the name of an open chain hydrocarbon containing the same total number of atoms.
NOMENCLATURE of bicyclic compounds
We name compounds containing 2 fused or bridged rings as bicyclo alkanes and we use the name of the alkane corresponding to the total number of carbon atoms as the base name. The carbon atoms common to both the rings are called bridgeheads, and each bond, or chain of atoms connecting the bridgehead atoms, is called a bridge.
In between the words bicyclo and alkane we interpose in the name an expression in the square brackets that denotes the number of carbon atoms in each bridge (in descending order). For example,
If substitutions are present, we number the bridged ring system beginning at one bridgehead, proceeding first along the longest bridge to the other bridgehead, then along the next longest bridge back to the first bridgehead. The shortest bridge in numbered last.