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1.  (2,2′-Bipyridyl-κ2 N,N′)chlorido(dl-threoninato-κ2 N,O 1)copper(II) monohydrate 
In the title compound, [Cu(C4H8NO3)Cl(C10H8N2)]·H2O, the CuII atom is in a slightly distorted square-pyramidal coordination geometry with the basal plane defined by the two N atoms of the bipyridine ligand and the N and O atoms from the threoninate ion and the apical site occupied by the Cl atom. In the crystal, inter­molecular O—H⋯O, N—H⋯O, O—H⋯Cl, C—H⋯O and C—H⋯Cl inter­actions link the mol­ecules into a three-dimensional network. A π–π inter­action with a centroid–centroid distance of 3.461 (1) Å is also present.
doi:10.1107/S1600536811002583
PMCID: PMC3051714  PMID: 21522913
2.  4-[(2-Hy­droxy-5-nitro­benzyl­idene)amino]­benzene­sulfonamide 
The title Schiff base compound, C13H11N3O5S, exists in an E configuration with respect to the C=N double bond. The benzene rings are almost coplanar, making a dihedral angle of 2.82 (6). The sulfonamide group is twisted away from the attached phenyl ring with an N—S—C—C torsion angle of 64.84 (11)°. An intra­molecular O—H⋯N hydrogen bond stabilizes the mol­ecule, generating an S(6) ring motif. In the crystal, inter­molecular N—H⋯O and C—H⋯O hydrogen bonds link the mol­ecules into a three-dimensional network.
doi:10.1107/S1600536810036949
PMCID: PMC2983168  PMID: 21587586
3.  Aqua­(1,10-phenanthroline-κ2 N,N′)(dl-threoninato-κ2 N,O 1)copper(II) chloride dihydrate 
The asymmetric unit of the title compound, [Cu(C4H8NO3)(C12H8N2)(H2O)]Cl·2H2O, contains a complex cation, a chloride anion and two water mol­ecules. The CuII ion has a distorted square-pyramidal coordination geometry formed by one bidentate phenanthroline ligand, one O,N-bidentate dl-threoninate ligand and one apical water mol­ecule. In the crystal structure, inter­molecular O—H⋯O, N—H⋯O, N—H⋯Cl and O—H⋯Cl hydrogen bonds link the components into layers. A single weak inter­molecular C—H⋯O inter­action connects these layers into a three-dimensional network.
doi:10.1107/S1600536810015278
PMCID: PMC2979221  PMID: 21579068

Results 1-3 (3)