摘要
A new one-dimensional (1-D) Zn(Ⅱ) nitronyl nitroxide complex bridged by pyridine-2,4-dicarboxylate anion, [Zn(NIT4Py)(2,4-PDA)(H2O)2], (NIT4Py = 2-(4′-pyridyl)-4,4,5,5- tetramethylimidazoline-1-oxyl-3-oxide and 2,4-PDA = pyridine-2,4-dicarboxylate anion), has been synthesized and structurally characterized by X-ray diffraction. It crystallizes in monoclinic, space group P21/c with a = 16.834(2), b = 7.4376(10), c = 18.295(3) A, β = 102.848(2)°, V = 2233.2(5) A^3, C19H23N4O3Zn, Mr = 500.78, Dc = 1.489 g/cm^3,μ(MoKa) = 1.152 mm^-1, F(000) = 1036, Z = 4, the final R = 0.0390 and wR = 0.0915 for 3234 observed reflections. In the complex, each zinc(Ⅱ) ion is six-coordinated by one nitrogen atom of the radical ligand (NIT4Py), one nitrogen atom and two oxygen atoms of two 2,4-PDA anions and two oxygen atoms of two water molecules. Each 2,4-PDA anion bridges two Zn(Ⅱ) ions via a tridentate mode into a 1-D chain, and these 1-D chains are further linked into a 2-D network via hydrogen-bonding interactions.
A new one-dimensional (1-D) Zn(Ⅱ) nitronyl nitroxide complex bridged by pyridine-2,4-dicarboxylate anion, [Zn(NIT4Py)(2,4-PDA)(H2O)2], (NIT4Py = 2-(4′-pyridyl)-4,4,5,5- tetramethylimidazoline-1-oxyl-3-oxide and 2,4-PDA = pyridine-2,4-dicarboxylate anion), has been synthesized and structurally characterized by X-ray diffraction. It crystallizes in monoclinic, space group P21/c with a = 16.834(2), b = 7.4376(10), c = 18.295(3) A, β = 102.848(2)°, V = 2233.2(5) A^3, C19H23N4O3Zn, Mr = 500.78, Dc = 1.489 g/cm^3,μ(MoKa) = 1.152 mm^-1, F(000) = 1036, Z = 4, the final R = 0.0390 and wR = 0.0915 for 3234 observed reflections. In the complex, each zinc(Ⅱ) ion is six-coordinated by one nitrogen atom of the radical ligand (NIT4Py), one nitrogen atom and two oxygen atoms of two 2,4-PDA anions and two oxygen atoms of two water molecules. Each 2,4-PDA anion bridges two Zn(Ⅱ) ions via a tridentate mode into a 1-D chain, and these 1-D chains are further linked into a 2-D network via hydrogen-bonding interactions.
基金
This work was supported by the National Natural Science Foundation of China (No. 20331010 and 20571045)