Raman and i.r. spectra are reported for dimethylcadmium, cadmium halides, and mixtures in tetrahydrofuran solution. From the cadmium-methyl and cadmium-halogen stretching frequencies it is concluded that the Schlenk equilibria lie predominantly on the side of monomeric CH,CdX species. For the equilibrium Me,Cd + Cdl, 2MeCdl. K is 2 110.WE have previously reported1 the i.r. and Raman spectra of solutions of dimethyl-and diethyl-zinc and of methyl-and ethyl-zinc halides in ethers. It was concluded that the Schlenk equilibrium lies predominantly on the side RZnX. Similar data (with more extensive laser Raman spectra) are now given for dimethylcadmium and mixtures of dimethylcadmium with cadmium halides in tetrahydrofuran (THF) solution. Solid alkylcadmium halides axe much less well known that the corresponding zinc compounds, although the preparation of ethylcadmium halides and n-butylcadmium bromide have been discribed.2 EXPERIMENTAL Raman spectra were measured in the region 100-600 cm-1 on a Cary 81 instrument with a helium-neon laser source (632-8 nm.). The Ranian tubes were constructed from 4 mm. o.d., 2 mm. i.d. Pyrex tubing, and were stoppered
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