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    Unusual [3+1] Cycloaddition of a Stable Silylene with a 2,3-Diazabuta-1,3-diene versus [4+1] Cycloaddition toward a Buta-1,3-diene by Yun Xiong (1403545)

    Published 2010
    “…The latter rearranges further to decrease ring strain, affording the corresponding 1-sila-4,5-diazacyclohex-3-ene <b>4</b>. …”