. 2018 Oct 18;33(8):336–348. doi: 10.1089/cbr.2018.2494

Table 1.

Chemical and Structural Properties of Ac³⁺ and La³⁺

Property^a	Ac³⁺	La³⁺
6-Coordinate ionic radius (Å)	1.12	1.03
pK_1h	9.4	8.5
η (eV)	14.4	15.4
E_A	2.84	3.90
C_A	0.28	0.379
I_A	10.14	10.29
Hydration number	10.9 ± 0.5	9.2 ± 0.37
M–O_H2O (Å)	2.59(3)^b, 2.63(1)^c	2.54(3)

^{^a}

pK_1h, first hydrolysis constant; η, absolute chemical hardness; E_A, electrostatic contribution to the formation constants of Lewis acid-base complexes; C_A, covalent contribution to the formation constants of Lewis acid-base complexes; I_A, ionicity in bonding, E_A/C_A.

^{^b}

Ref.⁷¹.

^{^c}

Ref.⁷².