Anhydro- hydroxides solid state structure

The solid state structures of anhydro-(3-methy - and 3-phenyl-2-hydroxy-4-oxo-47/-pyrido[l,2-n]pyridinium)hydroxides, 2-methoxy-3-methyl-47/-and 2-(2-pyridylamino)-47/-pyrido[l, 2-n]pyrimidin-4-ones were established by X-ray diffraction analysis. The amide type N(5)-C(4)-0 bonds are unusually long (144-149 pm) showing no sign of an amide type conjugation. 

The solid state structures of anhydro- 2-mQt iy - and 3-phenyl-2-hydroxy-4-oxo-4/7-pyrido[ 1,2-i2]pyridinium)hydroxides, 2-methoxy-3-methyl-4/7-... 

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