Triphenylgermyl, diphenyl-p-trifluoromethylphenylgermyl, diphenyl-p-methoxyphenylgermyl, and tricyclohexylgermyl hydroperoxides and bis(diphenyl-p-trifluoromethylphenylgermyl) peroxide have been sythesized from the corresponding organogermanium halides, hydroxides, oxides, methoxides, or amines. The infrared, pmr, and mass spectra are consistent with the proposed structures. Treatment of all of the germyl hydroperoxides or peroxides except p-methoxyphenyldiphenylgermyl hydroperoxide with hydrogen chloride yielded the corresponding chlorides in essentially quantitative yields. The p-methoxyphenyl group was partially cleaved from germanium upon treatment with hydrogen chloride to produce diphenylgermanium dichloride and anisole. © 1969, American Chemical Society. All rights reserved.