How to find the basic strength by seeing electronic effects, aromatic character
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bases donate lone pair of electron to electron deficient atoms, molecules.in a cyclic organic compound like pyridine , lone pair does not participate in reasonance so it is left free to be received by other atoms,so it's basic strength is high.....in componds like pyrrole lone pair of nitrogen participates in reasonance thus it is not free to be received by other atoms.so pyrrole is less basic than pyridine.
meerabai:
aromaticity is determined by huckles rule, compounds having 4n+2 pi electrons and if all pi bonds participate in reasonance,then only the compound is aromatic.non planar compounds are generally non aromatic.compounds having 4n pi electrons are
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