Analysis of the total amount of pairwise nearest and non-nearest neighbour interactions of substituents on the “centerpieces” in terms of Δ_fH^o_m(g) for tri-methoxy-substituted benzenes at 298.15 K (in kJ mol⁻¹).

Compound	ΔfHom(g)a	Actual amount of interactionsb	Theoretical amount of interactionsb	Δ c
1	2	3	4	5
1,2,3-Trimethoxybenzene	−350.6 ± 2.4	27.3	28.1	−0.8
1,2,4-Trimethoxybenzene	−360.3 ± 1.6	17.6	21.2	−3.6
1,3,5-Trimethoxybenzene	−382.1 ± 1.2	−4.2	−1.5	−2.7
3,4,5-Trimethoxytoluene	−382.1 ± 1.2	28.6	34.4	−5.8

^aResults from Table 7.

^bCalculated in Tables S16 an S17.

^cDifference between columns 3 and 4.