A cyanide-bridged 1-D helical chain involving both four- and six-coordinate nickel(II)

作者：Panja Anangamohan^*

来源：Journal of Coordination Chemistry, 2011, 64(6): 987-995.

DOI：10.1080/00958972.2011.560668

• Synthesis
• Crystal structure
• Cyano-bridged nickel(II) complex
• 1-D Helical chain
• Thermal study

A cyanide-bridged coordination polymer, {[Ni(tren)][Ni(CN)(4)]}(n) (tren = tris(2-aminoethyl)a-mine), has been synthesized by self-assembly of cis-[Ni(tren)](2+) and [Ni(CN)(4)](2-) building blocks. In the molecular structure, the paramagnetic cis-[Ni(tren)](2+) cations are bridged by diamagnetic [Ni(CN)(4)](2-) anions through two cis-cyanides to form a 1-D helical chain of {[Ni(tren)][Ni(CN)(4)]}(n). The compound crystallizes with a centrosymmetrical space group, P2(1)/n, in which the helical chains are packed in alternating right-and left-handed chiralities with a helical pitch of 10.2566(3) angstrom (equal to the length of the b-axis), leading to the formation of a racemic compound. The crystal packing is stabilized by moderately strong hydrogen-bonding between primary amines of tren and nitrogens of terminal cyanide.

• 出版日期2011