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Issue 57, 2019
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A stable bis(methylene)-λ4-selane with a >C[double bond, length as m-dash]Se[double bond, length as m-dash]C< bond containing Se(iv)

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Abstract

Bis(methylene)-λ4-selane 1, which represents a new class of heteroallenes, was synthesized and isolated as a stable purple crystalline solid. X-ray crystallographic analysis revealed a bent allene-type structure with pseudo C2v symmetry and a bent C[double bond, length as m-dash]Se[double bond, length as m-dash]C moiety that contains a 3-center-4-electron π-bond. The NMR spectrum of 1 shows compelling evidence for a slow rotation of the Se[double bond, length as m-dash]C moieties at room temperature. The 77Se NMR spectrum of 1 contains one signal in the region characteristic for Se(IV) compounds.

Graphical abstract: A stable bis(methylene)-λ4-selane with a >C [[double bond, length as m-dash]] Se [[double bond, length as m-dash]] C< bond containing Se(iv)

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Submitted
28 May 2019
Accepted
17 Jun 2019
First published
17 Jun 2019

Chem. Commun., 2019,55, 8254-8257
Article type
Communication

A stable bis(methylene)-λ4-selane with a >C[double bond, length as m-dash]Se[double bond, length as m-dash]C< bond containing Se(IV)

K. Sugamata, Y. Urao and M. Minoura, Chem. Commun., 2019, 55, 8254
DOI: 10.1039/C9CC04121D

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