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. 2015 Jan 30;54(16):4796–4800. doi: 10.1002/anie.201411399

Figure 6.

Figure 6

A) Orbital energy diagram of structures 4,61 and 4,62. B) Correlation between the sextet–quartet energy splitting (ΔGSQ) and the hydrogen-bond energy strength (ΔE+ZPEHBond), which is defined as the energy of the hydrogen-bonded complex with respect to three isolated species.