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A silylene-stabilized ditin(0) complex and its conversion to methylditin cation and distannavinylidene

Author

Listed:
  • Shaozhi Du

    (Nankai University)

  • Fanshu Cao

    (Nankai University)

  • Xi Chen

    (Nankai University)

  • Hua Rong

    (Nankai University)

  • Haibin Song

    (Nankai University)

  • Zhenbo Mo

    (Nankai University)

Abstract

Due to their intrinsic high reactivity, isolation of tin(0) complexes remains challenging. Herein, we report the synthesis of a silylene-stabilized ditin(0) complex (2) by reduction of a silylene-supported dibromostannylene (1) with 1 equivalent of magnesium (I) dimer in toluene. The structure of 2 was established by single crystal X-ray diffraction analysis. Density Functional Theory calculations revealed that complex 2 bears a Sn=Sn double bond and one lone pair of electrons on each of the Sn(0) atoms. Remarkably, complex 2 is readily methylated to give a mixed-valent methylditin cation (4), which undergoes topomerization in solution though a reversible 1,2-Me migration along a Sn=Sn bond. Computational studies showed that the three-coordinate Sn atom in 4 is the dominant electrophilic center, and allows for facile reaction with KHBBus3 furnishing an unprecedented N-heterocyclic silylenes-stabilized distannavinylidene (5). The synthesis of 2, 4 and 5 demonstrates the exceptional ability of N-heterocyclic silylenes to stabilize low valent tin complexes.

Suggested Citation

  • Shaozhi Du & Fanshu Cao & Xi Chen & Hua Rong & Haibin Song & Zhenbo Mo, 2023. "A silylene-stabilized ditin(0) complex and its conversion to methylditin cation and distannavinylidene," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42953-5
    DOI: 10.1038/s41467-023-42953-5
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    1. Philip P. Power, 2010. "Main-group elements as transition metals," Nature, Nature, vol. 463(7278), pages 171-177, January.
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