Darstellung und spektroskopische Eigenschaften einiger Perbromierter und periodierter Oligosilane

Preparation and Spectroscopie Properties of Some Perbromo- and Periodooligosilanes The cleavage of octaphenylcyclotetrasilane and decaphenylcyclopentasilane with Iodine, phosphorus pentabromide and bromine and the successive reaction with HBr/AlBr₃ or HI/AlI₃ give n-Si₄Br₁₀, n-Si₅Br₁₂, n-Si₄I₁₀, and n-Si₅I₁₂. Their IR and Raman spectra are discussed with the aid of a normal coordinate analysis. The spectra of the cyclic iodosilanes Si₄I₈, Si₅I₁₀, and Si₆I₁₂, prepared previously [1], are included in the discussion.