Boranes. XXX. Reaction of pentaborane(9) with diborane(6). Isolation of several new boron hydrides

Organometallic reactions of 1-ethynyl-1,2-carborane

“…The molecule chosen for study arises from slow decomposition of liquid pentaborane(9) at room tempera-ture3 or the hot-cold, flow-quench pyrolysis of gaseous B6H9 in the presence of diborane(6) at 140°. 4 The major product in both reactions is 2-[2'-pentaboran(9)yl]pentaborane(9), 2,2'-(B5H8)2.6 Mass spectra and nmr studies suggest a structure comprised of two B5H8 units connected by a boron-boron bond (see Figure 1).…”

Effects of LiBF4 Addition on the Lithium-Ion Conductivity of LiBH4

“…They observed that with increasing amount of [B 11 H 11 ] 2− and [B 10 H 10 ] 2− , ionic conductivity improves. Remarkably, under the reaction conditions used during our synthesis, pyrolysis of B 2 H 6 to B 10 H 14 can occur [ 60 , 61 ]. The in-situ generated B 10 H 14 can then react with LiBH 4 to form several closo -borate anions, similar to the synthesis performed by Toyama et al [ 54 ] The reaction scheme discussed here is presented in Figure 4 .…”

Polydeltahedral thiaboranes

“…Here the equivalent atoms in sets B (2,3,4,5) and B(6,7,8,9) (see Figure 1) are designated as the upper equatorial belt (ub) and the lower equatorial belt (lb), respectively; the unique boron at position 10 is termed axial (ax). There are six distinct ways to couple two 1-SBgHg units through a B-B bond.…”

“…The 1,2'-(B5H8)2 and 2,2'-(B5H8)2 isomers are also known. 2 The existence of other open frameworks joined by B-B bonds, e.g., (64119)2,3 (BsHgXBeHg),4 and (B5H8XB10H13)4 among others, has been suggested. Numerous examples of linked deltahedral5 (closo) cages are known, most involving 10-, 11-, and 12-vertex clusters.…”