Cis-trans-Isomere von Diazadiphosphetidin-Derivaten: Fünf Kristall- und Molekülstrukturen / Cis-trans Isomers of Diazadiphosphetidine Derivatives: Five Crystal and Molecular Structures
Open Access
- 1 February 1979
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 34 (2) , 256-261
- https://doi.org/10.1515/znb-1979-0223
Abstract
The crystal structures of the compounds [R3CP(X)NR]2(R= CH3; X=S, Te for cis isomers and X= lone pair, S, Te for trans isomers) (2-6) were determined from single crystal X-ray data. The four-membered P-N rings in the cis isomers 2 and 3 show significant deviations from planarity attributed to steric overcrowding in the molecules.The trans isomers 4-6 are planar. The P-N bond lenghts (mean values for 2-6:171.4, 170, 171.6, 169.2 and 168.3 pm)in the cis isomers are not significantly different from the corresponding lengths in the trans isomers 5 and 6.Keywords
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