Magnus Green Salt Research Articles

Evidence for Impurity Effects in Metal Chain Compounds: The Electron Paramagnetic Resonance of "Extrinsic" Magnus's Green Salt

Electron-paramagnetic-resonance studies of the one-dimensional metal-chain compound Magnus's green salt, ${\mathrm{P}\mathrm{t}(\mathrm{N}{\mathrm{H}}_{3})}_{4}$Pt${\mathrm{Cl}}_{4}$, has revealed the presence of localized hole states having an axial resonance with ${g}_{\ensuremath{\parallel}}=1.939\ifmmode\pm\else\textpm\fi{}0.002$ and ${g}_{\ensuremath{\perp}}=2.504\ifmmode\pm\else\textpm\fi{}0.002$. These states have been identified as bound ${d}_{{z}^{2}}$-like states associated with a ${d}_{{z}^{2}}$-like valence band. From the observed hyperfine pattern we infer that the holes, although localized, have orbits extended over several Pt sites along the chain. We show how the states can be introduced in a series of doping experiments with Magnus's green salt powders.

Anisotropic conductivity and thermoelectric power of magnus green salt

Anisotropic conductivity and thermoelectric power of magnus green salt

Electronic Absorption Spectra of Square-Planar d8 Complexes in Different Crystal Environments

Polarized crystal spectra of K2PdCl4 and K2PtCl4 have been measured at room temperature and interpreted by means of a vibronic intensity-borrowing mechanism. Single-crystal spectra of Magnus's green salt, Pt(NH3)4PtCl4, and its methylamine analog have also been measured, together with the powder spectra of a wide range of related salts. The visible absorptions are assigned to d—d transitions within axially perturbed anions, while a new infrared band in Magnus's green salt is identified with an intermolecular electron-transfer transition.

112. The metal–metal interaction in Magnus's green salt and related compounds

112. The metal–metal interaction in Magnus's green salt and related compounds

Spedrochemical Study of Microscopic Crystals. XVIII. The Color and the Structure of Compounds of a Magnus Green Salt Type

Abstract The color and the structure of the compounds of a Magnus green salt type, [Pt(amine)4] [PtCl4], have been studied. The dichroism with crystals of [Pt(methylamine)4] [PtCl4] and [Pt(ethylamine)4] [PtCl4] has been quantitatively determined at room temperature in the visible and ultraviolet region by the microscopic method. From the measurements, the unusually deep color of the former has been shown to be ascribed to a direct type of interaction between platinum atoms. No interaction of this sort is present in the crystal of the latter, which is pink in color. It is suggested that the compounds having a formula of [Pt(alkylamine)4] [PtCl4] may generally be classified into two kinds, one being colored green and the other pink. In the crystals of the former there is a direct type of interaction between platinum atoms at the center of the planar complexes, but no interaction of such a sort is operative in the crystals of the latter.