The calculated free enthalpies of cyclization Δ G cycl at the M06‐2X(D3)/def2‐TZVPP//BP86(D3)/def2‐SVP level of theory for α‐chlorosilyldigermenes 11 a , c , the corresponding disilenes 6 a , b , the s‐ cis acyldigermenes 13 a , c , and their silicon analogues 2 a , c show a clear trend (Table 2 ).
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