From IR spectra of hydrogenation products of C2D2, it was shown that the hydrogenation of C2H2 took place at cis-position of C2H2. That is, C2H2 coordinated to CoI(bpy) in side on.

• C_3D_3的加氢实验指出,C_2H_3侧配位于Co~I上发生顺位加氢反应。