Fine Structures of 8-G-1-(𝑝-YC_𝟔H_𝟒C≡CSe)C_𝟏𝟎H_𝟔 (G = H, Cl, and Br) in Crystals and Solutions: Ethynyl Influence and Y- and G-Dependences

Scheme 5

Equilibrium in 2: 2 (B: pd) is expected to be the substantial structure in solutions.