“…11 In these systems, however, the A-B n interactions are basically ionic. In a recent communication, 12 our group proposed a new class of sandwich-type complexes (B n X) 2 M (n ¼ 6, 7; X ¼ B, C, N; M ¼ Mn, Fe, Co, Ni), in which the transition metal center M is directly coordinated to two parallel [B 6 C] 2À or [B 7 B] 2À ligands. 13 In this work, we explore the possibility at DFT level to form transition metal-boron complexes B n M with bigger B n ligands in the size range of n ¼ 8-14.…”