Bis(tetraphenylphosphonium) tetrachloridocobaltate(II)

Abstract

The title compound, (C24H20P)2[CoCl4], was prepared under hydro­thermal conditions. In the crystal, the tetra­phenyl­phospho­nium cations are linked by pairs of weak C—H⋯π inter­actions into supra­molecular dimers; the CoII cations lie on twofold rotation axes and the tetra­hedral [CoCl4]2− anions are linked with the tetra­phenyl­phospho­nium cations via weak C—H⋯Cl hydrogen bonds.

Cobalt Deposition from Ionothermally Dissolved Cobalt Oxides

“…In the tetrahedral [CoCl 4 ] 2− anion, the Co−Cl distances are almost equal [227.0(1)–228.5(2) pm], whereas the Cl−Co−Cl angles range from 106.43(2)° to 112.33(2)°. The same anion was previously found in several compounds with similar interatomic distances and angles [38–44] …”

“…The same anion was previously found in several compounds with similar interatomic distances and angles. [38][39][40][41][42][43][44] According to charge balance, all cobalt atoms are in oxidation state + II, although different coordination environments are present, which is common for cobalt(II). [1] This is in good agreement with bond valence sums [45] of the cobalt atoms ranging from 1.94 to 2.05.…”