C–H⋯NC hydrogen bonding in cyanobenzene-ethylenedithio-tetrathiafulvalene compounds

Abstract

The importance of the C-H…N≡C interactions in the crystal engineering of conducting materials was recently put into evidence in a new type of two-dimensional conducting materials with composition (5-CNB-EDT-TTF)4A with...

Bilayer conducting salts with polymeric anions

“…− and FeCl 4 − or square planar anionic metal complexes, the CNB-EDT-TTF salts obtained still present related CN⋯H-C intermolecular interactions but in other forms, not leading to the donor bilayer structure. [7][8][9] More recently, the donor bilayer structure was also observed in a salt with a silver iodide polyanion, β″-(CNB-EDT-TTF) 6 Ag ∼7.91 I ∼9. 15 .…”

“…1,2,6,7 However, as these are not strong intermolecular interactions, the stability range of the bilayer structures based on this donor was found to be relatively small and restricted to salts with small anions; with not so small anions such as FeBr 4 − and FeCl 4 − or square planar anionic metal complexes, the CNB-EDT-TTF salts obtained still present related CN⋯H–C intermolecular interactions but in other forms, not leading to the donor bilayer structure. 7–9…”

“…[1][2][3][4][5] The bilayer structure in these compounds is ensured by a delicate network of CN⋯H-C intermolecular interactions that, in spite of being relatively weak hydrogen bonds, are quite effective in promoting a head-to-head arrangement of molecules in nearby layers as a combination of R 2 4 (10) and R 2 2 (10) synthons. 1,2,6,7 However, as these are not strong intermolecular interactions, the stability range of the bilayer structures based on this donor was found to be relatively small and restricted to salts with small anions; with not so small anions such as FeBr 4…”

Cyano benzene functionalised Ni and Cu bisdithiolene complexes

“…In addition, the cyano groups can be used as secondary coordination sites to build more complex heterometallic coordination architectures and networks and provide -CN⋯H interactions responsible for unique type of structures in the solid state. [31][32][33][34][35][36][37][38][39] In this paper, we present the synthesis and characterization of nickel and copper complexes with a new cyano benzene-functionalized bisdithiolene ligand 3cbdt = 3-cyanobenzene-1,2-dithiolate, obtained as tetraphenylphosphonium salts (Ph 4 P) n [M(3cbdt) 2 ], where n = 1, 2; M = Ni, Cu. These compounds present a rich polymorphism studied by single crystal X-ray diffraction and were further characterised by magnetization and EPR spectroscopy.…”

“…In addition, the cyano groups can be used as secondary coordination sites to build more complex heterometallic coordination architectures and networks and provide –CN⋯H interactions responsible for unique type of structures in the solid state. 31–39…”