Gold–boron chemistry. Part 1. Synthetic, structural, and spectroscopic studies on the compounds [5,6-µ-(AuPR₃)-nido-B₁₀H₁₃](R = cyclo-C₆H₁₁or C₆H₄Me-2)

Dicarbaheteroborane Chemistry. Representatives of Two Eleven-Vertex Dicarbaazaundecaborane Families: nido-10,7,8-NC2B8H11, Its N-Substituted Derivatives, andarachno-1,8,11-NC2B8H13

“…The most marked differences are for the nitrogen-bridged interboron distance B(2)−B(4) of 1.973 Å, some 20 Å longer than the hydrogen-bridged distance of 1.782 Å, and indicating a much weaker interboron bonding interaction. Comparison of literature values for the corresponding bridged B(5)−B(6) open-face connectivities in other nido -type ten-vertex clusters reveals considerable variation: 2.69 Å in [B 10 H 13 (μ-PPh 2 )], 2.08 Å in [B 10 H 12 (N 3 )(μ-NH 2 )], 2.211 in [5-(η 5 -C 5 Me 5 )RhB 9 H 12 (μ-NEt 2 )], 2.096 Å in [6-(η 5 -C 5 Me 5 )RhB 9 H 12 (μ-NEt 2 )], 1.872 Å in [B 10 H 12 -μ-PHC(Bu t )B 10 H 12 (SMe 2 )], 1.776 Å for the BHB bridge in B 10 H 14 itself, and 1.74 Å in the gold-bridged compound [{μ-Au(PPh 3 )}B 10 H 13 ] …”

A Molecular Boroauride: A Donor–Acceptor Complex of Anionic Gold

“…In contrast, [ 2 ] − is formally composed of an auride anion interacting with two cis ‐disposed borane ligands and is the only example of a mononuclear transition metal complex featuring two such short metal‐organoborane (BR 3 ) interactions. The short Au–B distances in [ 2 ] − are comparable to those found in gold complexes featuring base‐stabilized boryl and borylene ligands, multimetallic boride complexes, as well as metallaborane cluster compounds …”

Synthesis, Chemistry, and Electronic Structures of Group 9 Metallaboranes

“…Although numerous transition-metal derivatives of boranes are known for a variety of metal atoms, only few examples are known that involve Group 11 elements (Cu, Ag, and Au). − Several decaborane-14 have been transformed into mono- and diaurated boranes via metathesis with [(R 3 P)­AuMe] complexes (R = Cy, o-Tol, PPh 3 , etc. ). − Recently, we have also isolated a few rhodium gold borane complexes from the reaction of [(Cp*Rh) 2 B 6 H 10 ] or [(Cp*Rh) 2 B 8 H 12 ] with [Au­(PPh 3 )­Cl] (Chart ). These results from our work and others, − encouraged us to explore the same with the iridium system as both Rh and Ir being from the same group are expected to follow a similar reactivity trend.…”

“…). − Recently, we have also isolated a few rhodium gold borane complexes from the reaction of [(Cp*Rh) 2 B 6 H 10 ] or [(Cp*Rh) 2 B 8 H 12 ] with [Au­(PPh 3 )­Cl] (Chart ). These results from our work and others, − encouraged us to explore the same with the iridium system as both Rh and Ir being from the same group are expected to follow a similar reactivity trend. Thus, we performed the reaction of 1 with [Au­(PPh 3 )­Cl] with an excess of sodium hydride.…”