Novel 1,2‐Dicarba‐closo‐dodecaborane(12) Derivatives of Selenium

Abstract

Lithiation of 1,2-dicarba-closo-dodecaborane(12) (1) followed by insertion of selenium into both C-Li bonds leads to the 1,2-diselenolato-1,2-dicarba-closo-dodecaborane(12) dianion (3), which is converted by oxidative coupling into the cyclic eight-membered bis(diselane) 4 with annellated carborane moieties. Oxidative addition of 4 to ethenebis(triphenylphosphane)platinum(0) gives the bis(triphenylphosphane)platinum(II) complex 7, which contains a chelating 1,2-diselenol-

Direct insertion of sulfur, selenium and tellurium atoms into metallaborane cages using chalcogen powders

“…The distance between two selenium atoms (Se1 and Se2 in Fig. 1) in 6 is 3.16 Å, much longer than an average Se-Se bond distance {2.29-2.39 Å} [55][56][57]. By analogy with 5-6, compounds 7 and 8 can be considered as 50-electron, electronically unsaturated dichalcometallaboranes where both the chalcogen atoms bound contiguously to one boron and two metal centers.…”

Diselenastanna‐, ‐sila‐ and ‐carbacycles with an annelated dicarba‐closo‐dodecaborane(12) unit

“…In addition, the presence of another defined product 6 was noted by 13 C, 29 Si and 77 Se NMR spectroscopy, and the data appear to be consistent with a five-member ring containing the Se-Se-SiPh 2 unit, a rearrangement product of 4. Redox reactions between 1 and silicon chlorides appear to be common, since in a previous study 54 it was found that the reaction of two equivalents of 1 with SiCl 4 gave mainly the bis(diselane) 11 instead of a spirosilane.…”

Crystal structure of 3,4,7,8-bis(1,2-dicarba-closo-dodecaborano[1,2])- 1,2,5,6-tetraselenacyclooctane benzene solvate, [(C2B10H10)Se2]2 · C6D6

“…Recently, we described the molecular structures of cyclic compounds of tellurium [1] and selenium [2] containing two annellated [(dicarba-closo-dodecaborano)] units. The title compound is a new modification of the bis(ortho-carboran-1,2-diyl) selenium species containing two selena bridges.…”