Table 5. Mean Absolute Errors in Calculated Heats of Formation (kcal/mol), Bond Lengths (Å), Bond Angles (deg), Ionization Potentials (eV), and Dipole Moments (D) for the FLUOR Set and Its Subsets: MNDO, AM1, PMx, and OMx.

		method
subset	N	MNDO	AM1	PM3	PM6	PM7	OM1	OM2	OM3
Heats of Formation
overall	48	10.81	7.75	5.87	5.21	5.82	4.92	3.41	3.70
CHF	39	9.89	7.37	4.96	4.92	5.57	3.67	3.72	3.88
HNOF	9	14.79	9.42	9.81	6.48	6.90	10.32	2.08	2.93
Bond Lengths
overall	125	0.037	0.028	0.022	0.016	0.017	0.020	0.023	0.024
CHF	104	0.030	0.026	0.020	0.014	0.015	0.018	0.019	0.021
CHNOF	3	0.029	0.052	0.021	0.013	0.017	0.024	0.020	0.014
HNOF	17	0.080	0.037	0.037	0.026	0.026	0.032	0.043	0.044
Bond Angles
overall	69	3.00	3.16	2.75	2.76	2.55	1.97	2.23	1.78
CHF	56	2.59	2.93	2.69	2.64	2.45	1.88	2.06	1.61
CHNOF	3	2.89	3.76	3.41	3.76	2.61	1.30	2.44	1.75
HNOF	9	5.56	4.59	3.05	3.50	3.37	2.43	2.91	2.68
Ionization Potentials
overall	39	0.34	0.53	0.39	0.50	0.46	0.23	0.26	0.32
CHF	29	0.33	0.47	0.32	0.36	0.40	0.20	0.25	0.29
HNOF	9	0.38	0.70	0.57	1.00	0.68	0.30	0.29	0.42
Dipole Moments
overall	39	0.38	0.31	0.29	0.33	0.29	0.27	0.31	0.25
CHF	30	0.41	0.29	0.25	0.31	0.26	0.31	0.33	0.24
HNOF	8	0.29	0.44	0.47	0.42	0.41	0.15	0.26	0.29