title: Crystal structure of poly[bis-(μ-2-amino-4,5-di-cyano-imidazolato-κ(2) N (1):N (3))-trans-bis-(N,N'-di-methyl-formamide-κO)cadmium].
abstract: In the title structure, [Cd(C5H2N5)2(C3H7NO)2] n or [Cd(adci)2(DMF)2] n , the Cd(2+) ion is located on a twofold rotation axis and is six-coordinated in a CdN4O2 manner by four imidazole N atoms of four symmetry-related 2-amino-4,5-di-cyano-imidazolate (adci) anions in the equatorial plane and by two O atoms of symmetry-related N,N-di-methyl-formamide (DMF) ligands in axial positions. The adci(-) anions bridge adjacent Cd(2+) ions [shortest Cd⋯Cd separation = 6.733 (3) Å] into a layered coordination polymer extending parallel to (001). The primary amino group and the non-coordinating cyano groups of adci(-) anions are involved in hydrogen-bonding inter-actions with DMF ligands to stabilize the crystal structure.
authors.affiliation: College of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, People's Republic of China.
authors.forename: Jin-Li
authors.initials: JL
authors.lastname: Zhu
authors.affiliation: College of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, People's Republic of China.
authors.forename: Guo-Qing
authors.initials: GQ
authors.lastname: Jiang
authors.affiliation: School of Textile and Clothing, Nantong University, Nantong 226019, People's Republic of China.
authors.forename: Xiao-Qing
authors.initials: XQ
authors.lastname: Guo
authors.affiliation: College of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, People's Republic of China.
authors.forename: Yan-Feng
authors.initials: YF
authors.lastname: Tang
authors.affiliation: College of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, People's Republic of China.
authors.forename: Miao
authors.initials: M
authors.lastname: Wang
keywords: 2-amino-4,5-di­cyano­imidazole; cadmium coordination polymer; crystal structure; hydrogen bonding; metal–organic framework