Hydrogen Bonds between Acidic Protons from Alkynes (C–H···O) and Amides (N–H···O) and Carbonyl Oxygen Atoms as Acceptor Partners

Figure 5

Plot of 3 parallel polar columns viewed along 𝑐 axis, showing the NH⋯O=C (amide) hydrogen bonds (as dotted lines) and the weak vdW H⋯H contact between t-Bu (as yellow lines).