| Abstrakt: |
AbstractThe crystal structures of hydrates of five substituted benzaldehyde (pyrazinecarbonyl)hydrazone derivatives [N2C4H3CONHN=CHC6H5-nXn· mH2O: m= 1, n= 1, X = 3-HO; m= 1, n= 2, X2= 2,5-(HO)2; m= 1, n= 2, X2= 2,4-(MeO)2; m= 2.5, n= 2, X2= 3,4-(MeO)2; m= 3, n= 1, X = 4-HO] are reported. In all cases the water molecules participate in strong hydrogen-bonds extending and partially replacing the weak intermolecular C–HX (X = O, N or π-ring) hydrogen-bonding and π · · · π interactions normally present in anhydrous structures of compounds of this type. |
