Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Inorganic Chemistry Communications called D/L-mandelic acid-based three new Pb(II) coordination polymers: Influence of temperature and 5,5′-dimethyl-2,2′-dipyridyl ancillary ligand on constructuring enantiomeric coordination polymers, Author is Li, Xin; Feng, Qi; Liu, Manyu; Deng, Qianying; Jia, Zihan; Sun, Yangqian; Zuo, Xin; Shi, Junjie; Song, Hui-Hua; Yu, Hai-Tao, which mentions a compound: 1762-34-1, SMILESS is CC1=CN=C(C=C1)C1=NC=C(C)C=C1, Molecular C12H12N2, Recommanded Product: 5,5′-Dimethyl-2,2′-bipyridine.
Three new Pb(II) coordination polymers, namely [Pb2(mand)2]n (1), {[Pb(L-Hmand)(NO3)(5,5′-DM-2,2′-bipy)]·2H2O}n (2-L), {[Pb(D-Hmand)(NO3)(5,5′-DM-2,2′-bipy)]·2H2O}n (2-D) (H2mand = D/L-mandelic acid, 5,5′-DM-2,2′-bipy = 5,5′-dimethyl-2,2′-bipyridyl), have been prepared Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by elemental analyses, powder X-ray diffraction and thermogravimetric analyses. Complex 1 crystallizes in the triclinic system with space group P-1, and displays a 2D layer structure. Complexes 2-L and 2-D are pairs of enantiomers. They crystallize in the same chiral space group P212121 and feature a 1D chain structure. The influence of the temperature and steric-hindrance of 5,5′-dimethyl-2,2′-dipyridyl mols. on constructing enantiomeric Pb(II) coordination polymers based on chiral mandelic acid ligands have been demonstrated. In addition, the CD (CD) spectroscopy of 2-L and 2-D exhibit obvious pos. or neg. Cotton effects indicating their homochirality. The luminescent properties of 1, 2-L and 2-D in the solid state have also been investigated.
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