Table 2. Experimental and theoretical first ADE and VDE, calculated from the PBE/TZP, PBE0/TZP, and CCSD(T)/VTZ methods for the global minimum inverse sandwich structures of La₂B₇^– and La₂B₉^–

	ADE				VDE1
	Exp	PBE	PBE0	CCSD(T)	Exp	PBE	PBE0	CCSD(T)
La2B7–	1.2	1.33	1.27	1.35	1.35	1.38	1.32	1.40
La2B9–	1.94	1.88	1.78	1.93	2.04	1.92	1.90	1.98