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To satisfy the enterprise’s current requirement for web application and solve the existing problems in development of it, the paper presents a web application framework based on MVC mode in J2EE platform, and extends it with XML so that the framework is more flexible, expansible and maintainable. This extended framework has been proved feasible and… (More)
In the title compound, C(11)H(10)N(3)O(4)S(+)·C(2)Cl(3)O(2) (-), the benzene ring forms an angle of 85.21 (13)° with the pyridinium ring. The nitro group is nearly coplanar with its attached benzene ring [dihedral angle = 3.68 (12)°]. In the crystal structure, strong N-H⋯O hydrogen bonds link the ion-pairs. The packing is further consolidated by weak C-H⋯O… (More)
In the title salt, C(9)H(20)NO(+)·ClO(4) (-), inter-molecular hydrogen bonds are observed, which determine the crystal packing.
In the crystal structure of the title compound, C(9)H(20)NO(+)·Cl(3)CCOO(-), the cations and anions are connected via O-H⋯O, N-H⋯O, O-H⋯Cl and N-H⋯Cl hydrogen bonding. The six-membered ring adopts a chair conformation with the hydroxyl group in an equatorial position.
The crystal structure of the title compound, C(9)H(20)NO(+)·Cl(-)·0.33(H(3)O(+)·Cl(-)), is composed of 4-hydr-oxy-2,2,6,6-tetra-methyl-piperidinium cations, hydroxonium cations and chloride anions, which are connected via O-H⋯O, O-H⋯Cl and N-H⋯Cl hydrogen bonding. The 4-hydr-oxy-2,2,6,6-tetra-methyl-piperidinium cation and one of the two… (More)