Binary halides of platinum: Preparations, thermal decomposition and structural results

Structure and Bonding of the Mixed‐Valent Platinum Trihalides, PtCl3 and PtBr3

“…Therefore, the conventional method for the preparation of the tetrahalides is the thermal decomposition of commercial products of hexahalogenoplatinum(IV) acids H 2 PtX 6 ·xH 2 O in a stream of N 2 /Cl 2 resp. N 2 /Br 2 (T ഠ 500 K, 2Ϫ3 hours, quartz glass tube, corundum crucible) [9]. Powder samples of the trihalides are obtained by thermal decomposition of the tetrahalides in closed quartz glass ampoules with presence of halogens (Pressure X 2 Ն 1 bar, T ഠ 675 K) [9].…”

“…N 2 /Br 2 (T ഠ 500 K, 2Ϫ3 hours, quartz glass tube, corundum crucible) [9]. Powder samples of the trihalides are obtained by thermal decomposition of the tetrahalides in closed quartz glass ampoules with presence of halogens (Pressure X 2 Ն 1 bar, T ഠ 675 K) [9]. When PtBr 4 was heated in a quartz ampoule for 5 days in a 900 K / 520 K temperature gradient, black needle-shaped single crystals of PtBr 4 were found at the 520 K zone, in contact with dark green trigonal needles of PtBr 3 crystals in the 650 K zone [8].…”

PtIV-Catalyzed Cyclization of Arene−Alkyne Substrates via Intramolecular Electrophilic Hydroarylation

“…Also, PtCl 4 -catalyzed cyclization of alkyne substrates occurs at faster rates in solvents that solubilize the catalyst to a greater extent as demonstrated in the case of substrate 3 (dioxane vs dichloromethane, see above and also the Supporting Information). This may suggest that the higher reactivity of PtCl 4 (in comparison to PtCl 2 and other metal salts) may be related not only to the higher oxidation state of the platinum metal but also to the solubility of the catalyst …”

β-Technetium Dichloride: Solid-State Modulated Structure, Electronic Structure, and Physical Properties

“…The thermal behavior of technetium chlorides differ from those of rhenium and are more similar to those of platinum. For rhenium, ReCl 4 disproportionates to ReCl 3 and ReCl 5 , the trichloride volatilizes as the Re 3 Cl 9 cluster and no decomposition has been reported. , Similar to technetium, platinum tetra- and trichloride decompose to the dichloride (β-PtCl 2 ) . The thermal behavior of technetium tetrabromide has recently been reported .…”