ABSTRACT
In the centrosymmetric mononuclear title complex, [Ni(NO(3))(2)(C(11)H(17)N(4)O(2))(2)], the Ni(II) atom displays a distorted octa-hedral coordination geometry and is six-coordinated by two N,O-bidentate nitronyl nitroxide radical ligands and two monodentate nitrate anions.
ABSTRACT
In the title compound, [Ni(N(3))(2)(C(10)H(14)N(3)O(2)S)(2)], the Ni(II) atom lies on an inversion center and adopts a distorted trans-NiO(2)N(4) octa-hedral geometry, coordinated by two N,O-bidentate 4,4,5,5-tetra-methyl-2-(5-methyl-imidazol-4-yl)-2-imidazoline-1-oxyl 3-oxide nitronyl nitroxide radical ligands and two monodentate azide anions.
ABSTRACT
In the crystal structure of the title compound, [Mn(N(3))(2)(C(10)H(14)N(3)O(2)S)(2)], the Mn(II) atom exhibits a roughly octa-hedral coordination geometry. The Mn(II) atom lies on an inversion centre, thus the asymmetric unit comprises one half-mol-ecule. The metal center is six-coordinated by two azide anions and by two chelating 4,4,5,5-tetra-methyl-2-(1,3-thia-zol-2-yl)-2-imidazoline-1-oxyl-3-oxide nitronyl nitroxide radical ligands, leading to two six-membered chelate rings.
ABSTRACT
The crystal structure of the title compound, C(12)H(17)N(3)O(2) (+)·ClO(4) (-), consists of 4,4,5,5-tetra-methyl-2-(4-pyridinio)imidazoline-1-oxyl-3-oxide radical cations and perchlorate anions. Both the cation and the Cl atom of the anion are located on the same twofold rotation axis, and the crystal structure shows the average structure for the radical cation. The five-membered ring assumes a half-chair conformation. The cation links with the anion via N-Hâ¯O hydrogen bonding.
ABSTRACT
The title compound, C(30)H(26)N(4)O(4), was synthesized by the reaction of benzyl dihydrazone and 2-hydr-oxy-3-methoxy-benzaldehyde in ethanol. In the crystal strucutre, the mol-ecule is centrosymmetric. The structure displays two symmetry-related intra-molecular O-Hâ¯N hydrogen bonds.
ABSTRACT
The title compound C(12)H(17)N(3)O(2) (+)·Cl(-) consists of a discrete [NITpPyH](+) cation [NITpPy = 2-(4'-pyrid-yl)-4,4,5,5-tetra-methyl-imidazoline-1-oxyl-3-oxide] and a chloride anion. The NITpPy mol-ecule is protonated at the N atom of the pyridyl ring. The anions and cations are connected via N-Hâ¯Cl hydrogen bonds.
