6533b7d7fe1ef96bd126830e

RESEARCH PRODUCT

Syntheses and Crystal Structures of two Non-isostructural Copper(I) Chloride and Bromide π-Complexes with (2-Allylthio)benzimidazole of 1:1 Composition

Marian Mys'kivDieter SchollmeyerEvgeny Goreshnik

subject

Steric effectschemistry.chemical_classificationLigandchemistry.chemical_elementCrystal structureCopperCoordination complexInorganic Chemistrychemistry.chemical_compoundCrystallographychemistry13. Climate actionPolymer chemistryCopper(I) chlorideOrthorhombic crystal systemIsostructural

description

By alternating-current electrochemical synthesis crystals of C10H10N2S · CuCl (I) and C10H10N2S · CuBr (II) π-complexes have been obtained and structurally investigated. The symmetry of I is orthorhombic, space group Pbcn, a = 16.799(2) A, b = 7.302(2) A, c = 18.214(2) A, V = 2234.1(9) A3, Z = 8 for C10H10N2S · CuCl composition, R = 0.0635, Rw = 0.0683 for 970 reflections. Crystals of II are monoclinic, space group P21/n, a = 7.4439(5) A, b = 17.6952(3) A, c = 17.0420(7) A, s = 94.662(2)°, V = 2237.4(2) A<3, Z = 4 for (Cu · C10H10N2S)2Br2 composition, R = 0.0463 for 4123 reflections. (2-Allylthio)benzimidazole moiety acts in both structures discussed as a bidentate ligand, chelating the copper atom by its C=C group and N atom. Due to steric hindrance the S atom does not participate in the metal coordination. Self-assembling of the quasi-planar C10H10N2S · CuX units leads to the layer formation in I. The copper atom environment in I involves, except nitrogen atom and C=C-group, a chlorine atom in the equatorial plane and strongly removed another one at an apical position. In II two similar copper coordination polyhedra are joined to (Cu · C10H10N2S)2Br2 dimers, which are associated along c axes due to strong N-H.F hydrogen bonds. One of the copper(I) coordination spheres contains a disordered C=C-bond. Synthese und Kristallstrukturen von zwei nicht isostrukturellen Kupfer(I)-chlorid- und -bromid-Komplexen mit (2-Allylthio)benzimidazol (1:1) Durch elektrochemische Synthese mit Wechselstrom wurden Kristalle der π-Komplexe von C10H10N2S · CuCl (I) und C10H10N2S · CuBr (II) erhalten und strukturell untersucht. I ist orthorhombisch, Raumgruppe Pbcn, a = 16.799(2) A, b = 7.302(2) A, c = 18.214(2) A, V = 2234.1(9) A3, Z = 8, R = 0.0635, Rw = 0.0683 fur 970 Reflexe. Die Kristalle von II sind monoklin, Raumgruppe P21/n, a = 7.4439(5) A, b = 17.6952(3) A, c = 17.0420(7) A, s = 94.662(2)°, V = 2237.4(2) A3, Z = 4 fur (Cu · C10H10N2S)2Br2, R = 0.0463 fur 4123 Reflexe. (2-Allylthio)benzimidazol bindet in beiden Strukturen als zweizahniger Ligand, uber die C=C-Gruppe und das N-Atom am Kupferatom. Aufgrund sterischer Hemmung nimmt das S-Atom an der Koordination nicht teil. Die quasiplanaren C10H10N2S · CuX-Einheiten sind zweidimensional verbunden. In I sind auser dem Stickstoff-Atom, die C=C-Gruppe und ein Chlor-Atom in der aquatorialer Ebene um das Kupferatom angeordnet, ein weiteres Cl-Atom ist an der Spitze positioniert. In II sind die Kupfer-Polyeder von (CuC10H10N2S)2Br2 entlang der c-Achse uber starke N-H···F Wasserstoffbindungen verbunden. Eine der Kupfer(I)-Koordinationsspharen enthalt eine verzerrte C=C-Bindung.

https://doi.org/10.1002/1521-3749(200209)628:9/10<2118::aid-zaac2118>3.0.co;2-l