Table 2.

The best four-descriptor model.

Descriptor No.	X	±ΔX	t-Test	Descriptor
0	−4.5445	7.3386 × 10−1	−6.1926	Intercept
1	−2.5592 × 10−3	2.3118 × 10−4	−11.0701	ΔHf a
2	2.8334	3.8752 × 10−1	7.3116	Pµµ b
3	7.7801 × 10−2	1.0981 × 10−2	7.0850	µ c
4	−3.4698 × 10−1	1.5347 × 10−1	−2.2609	qmax° d

^a Final heat of formation of atoms. ^b Max atomic orbital electronic population. ^c Tot dipole of the molecule. ^d Max net atomic charge for a O atom.