Figure 4: Reversible dissociation and crystal structure of [1–1]2+.
From: Isolation and reversible dimerization of a selenium–selenium three-electron σ-bond
(a) Reversible dissociation of [1–1]2+. (b) Crystal structure of [1–1]2+ (in [1–1]2+(SbF6−)2) with 50% ellipsoid drawing. Yellow, carbon; red, selenium; white, hydrogen. Selected bond length (Å) and angle (°): Se1–C1 1.916(7), Se1–C11 1.912(8), Se2–C8 1.939(7), Se2–C17 1.931(8), Se1–Se2 2.8815(9), Se2–Se2' 2.9543(13), C1–Se1–C11 101.1(3), C8–Se2–C17 100.2(3), Se1–Se2–Se2' 174.79(4), Se1–Se2–Se2'–Se1' −180.0.
