Methylgermanium triiodide

Methyl chlorofluorophosphite, 4 141 analysis of, 4 143 Methyl dichlorophosphite, 4 63 Methyl difluorophosphite, 4 141 analysis of, 4 143 Methylgermanium oxide, 3 67 Methylgermanium sulfide, 3 67 Methylgermanium triiodide, 3 64 analysis of, 3 66... 

Methylgermanium triiodide is readily prepared by direct interaction of germanium(II) iodide with methyl iodide,... 

Iodine content is determined by precipitation as silver iodide from an aqueous solution of methylgermanium triiodide. Germanium is determined by oxidation with mixed nitric and sulfuric acids, followed by ignition to germar-nium(IV) oxide. Anal. Calcd. for CHjGels Ge, 15.49 I, 81.29. Found Ge, 15.7 I, 81.38. 

Methylgermanium triiodide is a lemon-yellow solid (m.p. 48.5°). Its crystals are anisotropic, biaxial negative, and probably rhombohedral. It is thermally stable, and may be distilled with no evidence of decomposition (b.p. 237° at 752 mm). The color dfeepens to red as the temperature rises, but returns to yellow as the sample cools. It is soluble in water with extensive hydrolysis, and is ammonolyzed in liquid ammonia. It is soluble in organic solvents and may be recrystallized from petrolevim ether by cooling a solution, saturated at 50°, to —33° by means of a bath of liquid ammonia. It may be sublimed at 45° in a vacuum to give beautiful, large, clear yellow crystals. 

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