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The two major fundamental obstacles which so far have prevented theisolation of stable silynes, RSi≡CR′ (1), are: (a)the existence of more stable isomers, e.g., RR′C=Si: (2) and(b) their extremely facile (exothermic) dimerication. The steric andelectronic effects of various substituents R and R′ (R = alkoxy,alkyl, aryl and silyl; R′ = alkyl and aryl groups) on the stability ofRSi≡CR′ relative to the...
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