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The title compound, C20H47NO6Si4, was synthesized by per-O-tri-methyl-silylation of N-acetyl-d-glucosa-mine using chloro-tri-methyl-silane in the presence of hexa-methyl-disiloxane. The tri-methyl-silyl group and acetamido group are located on the same side of the pyran ring, showing an α-configuration glycoside. One of the tri-methyl-silyl groups is disordered over two orientations, with site-occupancy factors of 0.625 (9) and 0.375 (9). In the crystal, N-H⋯O hydrogen bonds link the mol-ecules into supra-molecular chains along the a-axis direction.

In the unsymmetrical title complex, [Ni(C(20)H(23)N(4)O(4))]ClO(4), the coordination geometry for the Ni(II) atom can be described as square planar. The aromatic rings in the two ligands are almost vertical, with a dihedral angle of 85.3°. In the crystal, cations and anions are linked by weak C(N)-H⋯O hydrogen bonding.

In the solvated title complex, [Ni(C(46)H(47)N(6)O(2))]ClO(4)·2CH(4)O, the coordination sphere around the Ni(II) ion can be described as distorted cis-NiO(2)N(4) octa-hedral defined by two phenolate O atoms and four N atoms from the hexa-dentate ligand. An intra-molecular bifurcated N-H⋯(N,O) hydrogen bond helps to establish the conformation of the complex mol-ecule. In the crystal, the components are connected by O-H⋯O and C-H⋯O hydrogen bonds.

In the title dinuclear complex, [Cu(2)(C(14)H(20)ClN(4)O)ClO]·3H(2)O, one Cu(II) cation assumes a distorted square-planar coordination geometry and the other a distorted square-pyramidal coordination geometry. Both Cu(II) cations are N,N',O-chelated by one arm of the 2,6-bis-[(2-amino-eth-yl)imino-meth-yl]-4-chloro-phenolate anion, and one oxide anion bridges the two Cu(II) cations, forming a dinuclear complex. One of the Cu(II) cations is further coordinated by an Cl(-) anion in the apical direction. In the crystal, lattice water mol-ecules are linked with the complex mol-ecule via O-H⋯Cl hydrogen bonds while O-H⋯O hydrogen bonding occurs between lattice water mol-ecules , forming three-dimensional network structure.

In the title solvated mol-ecular salt, [CuCl(C(28)H(30)N(4))]ClO(4)·CH(3)OH, the Cu(2+) ion is coordinated by the N,N',N'',N'''-tetra-dentate ligand and a chloride ion, generating a very distorted square-based pyramidal CuN(4)Cl coordination geometry with the Cl(-) ion in the basal position. In the crystal, the solvent mol-ecules and anions are linked by weak O-H⋯O hydrogen bonding.

The title compound, C(18)H(26)O(11), was synthesized by a condensation reaction of 2,3,4,6-tetra-O-acetyl-α-d-galactopyranosyl bromide and butyric acid. The acet-oxy-methyl and butyrate groups are located on the same side of the pyran ring, showing the β configuration for the d-glycosyl ester; the butyl group adopts an extend conformation, the C-C-C-C torsion angle being 179.1 (7)°. In the crystal, the mol-ecules are linked by weak C-H⋯O hydrogen bonds.

In the title compound, [Ni(C(13)H(11)ClN(3)O(2))(2)], the Ni(II) atom is located on a twofold rotation axis and is six-coordinated by four N atoms and two phenolate O atoms from the two equal Schiff base ligands in a distorted octa-hedral coordination geometry. The complex mol-ecules are connected by C-H⋯Cl, C-H⋯O and N-H⋯O hydrogen bonds.