[2 + 2] Cycloaddition derivatives of stiba(III)alkene (Sb[double bond, length half m-dash]C) and arsa(III)imine (As[double bond, length half m-dash]N) intermediates

Abstract

Mild thermolysis of (2-pyridyl)(SiMe₃)₂CSbCl₂ and [2-(6-Me)pyridyl](SiMe₃)NAsCl₂ affords, respectively, the chloro-bridged polymeric geminal C-centred distibine(III) complex [(2-pyridyl)(SiMe₃)CSbCl]_∞ 1 and the geminal N-centred arsenic(III) amide [{2-(6-Me)pyridyl}NAsCl]₂ 2; the proposed mechanism involves the elimination of Me₃- SiCl and a [2 + 2] stereospecific cis-cycloaddition of the stibaalkene (Sb[double bond, length half m-dash]C) and arsaimine (As[double bond, length half m-dash]N) intermediates.

References

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