closo-B21H−18 is formed by the face-sharing condensation of two icosahedra. The … See more

The bis-nido-B12H16 is formed by the edge-sharing condensation of a nido-B8 unit and a nido-B6 unit. The m + n + o + p − qcount of 16 SEPs are satisfied b… See more

m + n + o + p − q = 26 SEPs. A transition metal with n valence electrons provides n − 6 electrons for skeletal bonding as 6 electrons occupying the metal-like orbitals do not cont… See more

B18H2−20 is a bis-nido edge-shared polyhedron. Here, m + n + o + p − q= 2 + 18 + 0 + 2 − 0 = 22; 16 BH units provide 16 pairs, 4 bridging hydrogen atoms provide 2 p… See more

Triple-decker complexes are known to obey a 30-valence electron (VE) rule. Subtracting 6 pairs of nonbonding electrons from the two metal atoms brings the number of SEPs to 9 … See more

The structure of β-rhombohedral boron is complicated by the presence of partial occupancies and vacancies. The idealized unit cell, B105 has been shown to be electron-de… See more