Answers are grounded in this paper and cite their sources.
Bond stabilization through bending! Valence bond analysis shows that the σ frames of 1-3 (1: E = Si, E' = C; 2: E = E' = Si; 3: E = E' = C) are stabilized by trans bending (B), while π bonding is weakened. In acetylene (3) π bonding overrides the σ frame and establishes a linear molecule (3 L). In contrast, the σ frames dominate in silyne (1) and disilyne (2) and lead to trans-bent structures (1 B and 2 B).
No takes yet. Share an insight, caveat, or question.
Danovich et al. (2001) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: