Group IV Metal Sulphides

Group IV Metal Sulphides. The dissociation products of CS2 in a vitreous carbon thermal cell have been analysed223 mass, spectrometrically for temperatures up to 1900 K. CS and S were the only detected products, indicating that the dominant reaction is  

The small-angle scattering of 40 keV electrons by CS2 molecules has been measured,224 and the dynamics of the CS2-02 flame have been investigated.225 

Nagashima, S. Konaka, T. Iijima, and M. Kimura, Bull. Chem. Soc. Japan, 1973, 46, 3348. 

Wakatsuki, Y. Takeda, and T. Tanaka, Inorg. Nuclear Chem. Letters, 1974, 10, 383. 

The entropy contents of lead chalcogenides have been measured240 at temperatures between 300 K and their melting points. Enthalpies of mixing in the liquid state (for mole fractions of chalcogen = 0.5) were calculated. These values confirm the more metallic nature of the melts with tellurium as 

Group IV Metal Sulphides. The core-level electron spectrum of CSg, excited by Mg radiation, has been studied to identify shake-up satellite lines associated with ionizations from these levels. A number of such lines were observed and possible assignments suggested using the excited states of the molecule as a guide. The valence spectra were also recorded and they too were found to be rich in shake-up structure. The photoelectron spectra of 

Letoff, M. Prost, and J. Bousquet, Bull. Soc. chlm. France, 1972, 4490. E. Pedak, M. Allsalu, and M. Kanter., Zhur. priklad. Khim., 1972, 45, 2619. 

Solid silicon monosulphide in an amorphous form has been prepared by the condensation of gaseous SiS at high temperatures. Vaporization and vapour pressure data suggest that SiS is metastable, disproportionating into SiS2 and silicon at an appreciable rate above 950 K. SiS appears to be thermodynamically unstable below 1452 K. Vaporization of solid SiS2 yields predominantly SiS and S2 species according to the dissociation process  

Partial pressures of SiS and other sulphur species were measured over the temperature range 991—1122 K and used to compute the standard free-energy change of the reaction. The molecular and crystal structures of tetra(methyl-germanium)hexasulphide have been determined. The crystals are monoclinic, space group C2/c, with a — 9.422, b — 16.779, c = 10.708 A 107.94 , and Z = 4. The molecule was found to adopt the adamantane (3) rather than the open-cage structure (4), both of which have previously been 

Mossbauer spectra have been reported for the tin sulphides SnS, Sn3S4, SngSg, and SnSg. The spectra observed for the compounds Sn3 4 and Sn2Ss may be represented as a superposition of spectra characteristic of SnS and SnSg. At 480 K the heat (Aifj = 23.4 kcal mol ) and entropy (A5 = —1.2 cal mol i degree ) of formation of PbS have been measured by differential thermal calorimetry for the reaction  

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