Die Kristall‐ und Molekülstruktur von \documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm P}\limits^ + {\rm CH}_2 {\rm \bar BH}_3 $\end{document}

The Crystal and Molecular Structure of \documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm P}\limits^ + {\rm CH}_2 {\rm \bar BH}_3 $\end{document} The zwitterionic molecule (CH 3 ) 3 \documentclass{article}\pagestyle{empty}\begin{document}$ \mathop {\rm P}\limits^ + {\rm CH}_2 {\rm \bar BH}_3 $\end{document} crystallizes orthorhombicly, space group Pna 2 1 . While the CH 3 groups in (CH 3 ) 3 PCH 2 are bent away from the ylidic function, this strain is relieved in the adduct towards tetrahedral angles. The PCH 2 bond distance is elongated on BH 3 ‐addition from a double bond value of 164 to a single bond distance of 175.6 pm.