title: Synthesis and molecular structures of two [1,4-bis(3-pyridyl)-2,3-diazo-1,3-butadiene]-dichloro-Zn(II) coordination polymers.
abstract: Two novel coordination polymers with 3D metal-organic frameworks (MOFs) have been synthesized by reacting 1,4-bis(3-pyridyl)-2,3-diazo-1,3-butadiene (L) with zinc dichloride. Both compounds have the same repeating unit consisting of a distorted tetrahedral Zn(II) center coordinated by two chlorides and two pyridyl nitrogen atoms of two bridging bismonodentate L ligands, however, different structural conformations have been found, one forming a helical chain and the other producing a square-wave chain. The intermolecular C-H...Cl hydrogen bonds in 1 and 2 play important roles in the formation of three-dimensional coordination polymers. Compound 1 crystallized in an orthorhombic space group Pna21 with a = 7.9652(3), b = 21.4716(7), c = 8.2491(3)A, V = 1410.81(9) A 3 and Z = 4. Compound 2 crystallized in a monoclinic space group P21/n with a = 9.1752(3), b = 14.5976(4), c = 10.3666(3) A , beta = 98.231(2) degrees , V = 1374.16(7) A 3 and Z = 4.
authors.affiliation: Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106, Taiwan. ghlee@ntu.edu.tw
authors.forename: Gene-Hsiang
authors.initials: GH
authors.lastname: Lee
authors.forename: Hsin-Ta
authors.initials: HT
authors.lastname: Wang
mesh_terms: D006860:Hydrogen Bonding; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry*; D012997:Solvents; D013696:Temperature
chemical_list: C524681:(1,4-bis(3-pyridyl)-2,3-diazo-1,3-butadiene)dichlorozinc(II) polymer; D009942:Organometallic Compounds; D011108:Polymers; D012997:Solvents