Related Experiment Video
Updated: Jun 5, 2026

10:42
Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
Published on: December 29, 2016
5-Benzyl-idene-2,3-diphenyl-1,2-selenaphosphole-2-selenide
Yang Li1, Guoxiong Hua, Alexandra M Z Slawin
1Department of Chemistry, University of St Andrews, St Andrews KY16 9ST, Scotland.
Acta Crystallographica. Section E, Structure Reports Online
|January 5, 2011
Abstract:
The title compound, C(23)H(19)PSe(2), has a central five-membered twist C(3)PSe ring conformation. One phenyl ring substituent, attached to an sp(2) carbon, is approximately coplanar with the C(3)PSe ring whilst the other organic substituents, attached to an sp(3)-carbon and a P(V) atom, lie on the same side of the ring.
Related Concept Videos
Preparation and Reactions of Sulfides
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
VSEPR Theory and the Basic Shapes
Overview of VSEPR Theory
Chirality at Nitrogen, Phosphorus, and Sulfur
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...

