Crystal Structures and Thermal Behavior of Isostructural Bis(dibenzyldimethylammonium) Tetrachlorometallate [M = Mn(II), Co(II), Ni(II) and Zn(II)] Solvates Crystallized from Acetonitrile and/or Methanol Solutions

Abstract

anion is close to tetrahedral, whereas the analogous copper anions appeared in distorted tetrahedral geometries with trans angles of 124.4 • for X = Cl and 123.6 • for X = Br. In addition to the ionic interactions between the cations and the anions, the components are connected by weak C-H··· Cl − bonds. As a distinction between the two crystallographically independent cations in the asymmetric unit, one type of independent cations form long chains via weak edge to face π-π interactions along the crystallographic b axis, whereas the other type of cations are not tied together by such weak π-π interactions. The coordination around the N atoms is also nearly tetrahedral, and neither static nor dynamic disorder of the Bz 2 Me 2 N + cations can be observed. The complexes are thermally stable and melt close to the decomposition temperatures in the range 170 -205 • C.

Crystal Structures and Thermal Behavior of Bis(dibenzyldimethylammonium) Tetrabromometallates(II) [M = Mn(II), Co(II) and Zn(II)] and Their Solvates

“…The coordination geometry of the MX 4 2− ions is tetrahedral in all cases (1 -5) as the Br-H-Br angles are close to 109.5 • C. A tetrahedral coordination sphere was also observed for previously reported MCl 4 2− anions (M = Mn, Co, Ni or Zn) [45]. Thus, changing the halide from chloride to bromide does not affect the configuration of the MX 4 2− anions.…”

“…Not all compounds are isostructural unlike the previously reported corresponding tetrachlorometallates [45].…”

“…• C) reported earlier [45]. All compounds start to decompose shortly above the melting point and decompose mainly in two steps.…”

“…Compound 2 is isostructural with the corresponding tetrabromo-and tetrachlorocuprate(II), and the tetrachloromanganate(II), -cobaltate(II) and -nickelate(II) compounds [44,45]. The geometry of the The packing of the components is presented in Fig.…”

The conformational polymorphism and weak interactions in solid state structures of ten new monomeric and dimeric substituted dibenzyldimethylammonium chloridopalladate salts

“…In our previous research the interest has been focussed on investigating the structural properties of the halidometallate anion and the weak interactions between the cations and anions by altering the first row transition metal from Mn to Zn and using the same dibenzyldimethylammonium cation. 8,9 In these structures, the anion has either tetrahedral of distorted tetrahedral geometry that in turn causes most of the structures to be isostructural.…”