• Bulletin of the Korean Chemical Society
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• 제26권6호
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• pp.892-898
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• 2005

A long, bis(monodentate), linking Schiff-base ligand L (py-CH=N-$C_6H_4$-N=CH-py) was prepared from 1,4-phenylenediamine and 3-pyridinecarboxaldehyde by the Schiff-base condensation. Ligand L has two terminal pyridyl groups capable of coordinating to metals through their nitrogen atoms. In contrast, the same reaction between 1,2-phenylenediamine and 3-pyridinecarboxaldehyde produced a mixture of imidazol isomers (2-pyridin-3-yl-1H-benzoimidazole), which are connected to one another by the N-H…N hydrogen bonding to form a tetramer. From Zn($NO_3)_2{\cdot}6H_2O$ and ligand L under various conditions, one discrete molecule, trans- [Zn($H_2O)_4L_2]{\cdot}(NO_3)_2{\cdot}(MeOH)_2$, and two 1-D zinc polymers, [Zn$(NO_3)(H_2O)_2(L)]{\cdot}(NO_3){\cdot}(H_2O)_2$ and [Zn(L) (OBC)($H_2O$)], were prepared. In ligand L, the N$\ldots$N separation between the terminal pyridyl groups is 13.994 $\AA$, with their nitrogen atoms at the meta positions (3,3’) in a trans manner. The corresponding N$\ldots$N separations in its compounds range from 13.853 to 14.754 $\AA$.

• Bulletin of the Korean Chemical Society
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• 제28권3호
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• pp.421-426
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• 2007

A linking ligand containing sulfur donor atoms in the terminal thiophene rings, 1,2-bis(thiophen-2-ylmethylene) hydrazine (L), was prepared by Schiff-base condensation. Ligand L reacted with [PdCl2(NCPh)2] to produce a molecular Pd compound [PdL2Cl2] (1). On the other hand, it reacted with AgNO3 and AgClO4 to produce a 2-D network [AgL0.5(NO3)] (2) and a 1-D polymer [AgL]ClO4 (3), respectively, whose structures are based on secondary intermolecular forces such as H-bonding, van der Waals interaction, and π-π stacking. Polymer 2 exhibited photoluminescence at room temperature in the solid state.

• 한국결정학회지
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• 제16권1호
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• pp.6-10
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• 2005

4-Nitrobenzaldehyde와 3-nitroaniline의 Schiff-base 축합 반응으로 잠재적 연결 리간드 (4-Nitro-benzylidene)-(3-nitro-phenyl)-amine (1)이 합성되었다. 리간드 1과 $PdCl_2(NCPh)_2$ 반응에서 가수 분해로 인한 예상 밖의 생성물 $trans-PdCl_2(NO_2-C_6H_4-NH_2)_2$ (2)가 분리되었다 X-ray 회절법으로 화합물 1과 2가 구조적으로 규명되었다. 화합물 2에서 3-nitroaniline의 $NH_2$ 수소 원자들은 Cl 원자와 분자간 NH${\cdot}\;{\cdot}\;{\cdot}\;$Cl 수소 결합에 참여하고 있다.