Synthesis of cadmium sulfide using the spontaneous reaction of

Abstract

Cadmium sulfide is formed successfully from the reactants hydrogen sulfide md the representative dialkylcadmium, dimethylcadmium, spontaneously when mixed in the gas phase. Reactions are monitored using fourier transform infrared spectroscopy which also permits the identification of gaseous products. The gaseous products of this reaction are identified as methane and ethene. The stoichiometry of the cadmium sulfide depends upon the reactant pressure ratios. The process procedure and sample handling is accomplished using standard vacuum line techniques. This particular process is extremely useful, as the stoichiometry of the product cadmium sulfide can be controlled by the purity of the starting materials and the ratios of reactant pressures. Typical reaction mixtures range from about 14 to 32 torr of dimethylcadmium and from about 30 to about 279 torr of hydrogen sulfide. The cadmium sulfide is formed as a reddish orange powder which is used as a precursor for a single crystal production for detector use.