Table 11.

Average unsigned errors in bond lengths for various sets of elements (Å)

Set of elements	No.	PM6	RM1	PM5	PM3	AM1
H, C, N, O	413	0.025	0.022	0.033	0.021	0.031
H, C, N, O, F, P, S, Cl, Br, I	712	0.031	0.036	0.044	0.037	0.046
Whole of main group	2636	0.085		0.121	0.104	0.131
70 elements	5154	0.091