ortho-Cycloboronation of a Thiobenzoate Cluster: [(PPh₃)(PhC\bridge{OS)$_{2}$NiB}{12.5mm}₁₀H₁₀].0.5C₆H₁₄

Synthesis of 10‐Methylsulfide and 10‐Alkylmethylsulfonium nido‐Carborane Derivatives: B–H···π Interactions between the B–H–B Hydrogen Atom and Alkyne Group in 10‐RC≡CCH2S(Me)‐7,8‐C2B9H11

“…To the best of our knowledge, this is the first example of intramolecular B–H ··· π(C≡C) hydrogen bonding. The intramolecular B–H ··· π(aryl) hydrogen bonds with participation of the B–H–B bridging hydrogen atoms were found earlier in metallaborane complexes with arylphosphine ligands 7‐(Ph 3 P)‐2,7:3,7‐(PhCOS) 2 ‐7‐NiB 10 H 10 , 6,6‐(PhMe 2 P) 2 ‐6,6‐(CO) 2 ‐5‐Cl‐6‐MoB 9 H 12 , and 6,6,6‐(PhMe 2 P) 3 ‐6‐H‐6‐ReB 9 H 13…”

“…To the best of our knowledge, this is the first example of intramolecular B-H···π(C≡C) hydrogen bonding. The intramolecular B-H···π(aryl) hydrogen bonds with participation of the B-H-B bridging hydrogen atoms were found earlier in metallaborane complexes with arylphosphine ligands 7-(Ph 3 P)-2,7:3,7-(PhCOS) 2 -7-NiB 10 H 10 , [44] 6,6- (PhMe 2 P) 2 -6,6-(CO) 2 -5-Cl-6-MoB 9 H 12 , [45] and 6,6,6-(PhMe 2 P) 3 -6-H-6-ReB 9 H 13 . [46] In contrast to compound 8, the molecular conformation of compound 10 in the crystal structure is such that no B-H···π(C≡C) contact is observed.…”