Theoretical Prediction for Synthetic Realization: Pyramidal Systems ClE[E′₄R₄] (E = B–Ga, E′ = C–Ge, R = SiMe₃, SiMe^tBu₂): A DFT Study

Table 2

Numbers of imaginary frequencies (NI) and relative energies towards closest minima (∆E, kcal mol⁻¹) for pyramidal systems 1′–9′.

Structure	E = B	E = Al	E = Ga
ClE[C4(SiMe3)4]	1′, NI = 0	2′, NI = 0	3′, NI = 2, ∆E = 6.3
ClE[Si4(SiMe^tBu2)4]	4′, NI = 0	5′, NI = 0	6′, NI = 0
ClE[Ge4(SiMe^tBu2)4]	7′, NI = 1, ∆E = 2.7	8′, NI = 3, ∆E = 2.2	9′, NI = 3, ∆E = 2.0