Table 9. Comparison between Literature and Predicted Values of −Δ_fH_m° (g, 298.15 K) in kJ mol^–1 and Benson.

compound	literature	predicteda	Δ	predictedb	Δ	Bensonc	Δ
coumarin	176.8d	176.8	0	179.4	2.6	173.7	–3.1
3-hydroxycoumarin	367.7e	353.6	–14.1	354.3	–13.4	371.1	3.4
4-hydroxycoumarin	351.4e	349.5	–1.9	350.7	–0.7	371.1	19.7
5-hydroxycoumarin	344.9f	345.4	0.5	347.0	2.1	371.1	24.6
6-hydroxycoumarin	339.8g	341.3	1.5	343.4	3.6	371.1	31.3
7-hydroxycoumarin	337.5f	337.2	–0.3	339.7	2.2	371.1	33.6
8-hydroxycoumarin	349.2f	333.0	–16.2	336.0	–13.2	371.1	21.9
5-methoxycoumarin	329.7h	327.9	–1.8	329.2	–0.5	327.1	–2.6
6-methoxycoumarin	321.5h	323.8	2.3	325.5	4.0	327.1	5.6
7-methoxycoumarin	321.6h	319.7	–1.9	321.9	0.3	327.1	5.5
8-methoxycoumarin	314.2h	315.6	1.4	318.2	4.0	327.1	12.9
7M4MC	383.6i	384.9	–1.3	382.2	1.4	415.5	31.9

^aValues predicted using MLR.

^bValues predicted using the SGD regression.

^cValues calculated using Benson.

^dTaken of ref (45).

^eTaken of ref (46).

^fTaken of ref (47).

^gTaken of ref (48).

^hTaken of ref (49).

ⁱExperimental value of this work.