Tert-Butylphosphaacetylene

• (2,2- Dimethylpropylidin ) phosphine
• Tert- Butylphosphaacetylen

Liquid

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Tert- Butylphosphaethin is a phosphaalkyne the composition P ≡ C -C ( CH3 ) 3

It is the first isolable at room temperature and usable phosphaalkyne. tert- Butylphosphaethin is a colorless, distillable at 61 ° C, air-sensitive liquid. It was obtained by the base-catalyzed β -elimination of hexamethyldisiloxane from phosphaalkene [( Me 3 SiO ) ( But) C = PSiMe3 ]. The synthesis of these kinetically stabilized compound represented a milestone in the study of the reactivity of carbon-phosphorus multiple bonds dar. On the basis of data from crystal structures could be determined for the P ≡ C bond is a bond length of 154.8 pm. Allow quantum mechanical calculations suggest that the properties are more comparable with alkynes with nitriles, which explains the extraordinary interest in this connection.