79449-05-1Relevant articles and documents
A hexanuclear gold cluster supported by three-center-two-electron bonds and aurophilic interactions
Smirnova, Ekaterina S.,Echavarren, Antonio M.
, p. 9023 - 9026 (2013)
A heart of gold: The first hexanuclear gold cluster formed exclusively by gold(I) centers (see picture; Au-yellow, C-black, P-purple) has been shown to be catalytically active for the activation of alkynes under homogeneous conditions. Copyright
Arylallenes and the halogeno-B(C6F5)2 reagents: Facile formation of 2-borylindenes
Tao, Xin,Daniliuc, Constantin G.,Soloviova, Kateryna,Strassert, Cristian A.,Kehr, Gerald,Erker, Gerhard
supporting information, p. 10166 - 10169 (2019/08/30)
Phenylallene reacts rapidly with ClB(C6F5)2 to give the respective 2-borylindene. Several substituted allenylarenes form the respective 2-B(C6F5)2 boryl-substituted indenes upon treatment with ClB(C6F5)2 or BrB(C6F5)2 as well. Bis- and tris-allenylarenes form the corresponding products featuring multiple five-membered ring annulations, including a symmetrical tris-borylated dihydro-1H-trindene derivative. The B(C6F5)2 borylindenes show fluorescence properties.
Gold for the generation and control of fluxional barbaralyl cations
McGonigal, Paul R.,De Leon, Claudia,Wang, Yahui,Homs, Anna,Solorio-Alvarado, Cesar R.,Echavarren, Antonio M.
, p. 13093 - 13096 (2013/03/13)
Fluxional molecules which rapidly pass back and forth between a large number of constitutional isomers through low-energy rearrangements have fascinated chemists owing to their role in the study of fundamental theoretical concepts[ 2] and their potential to adapt their chemical structures in response to their environment or to act as prototypical molecular transport systems. They represent a facet of systems chemistry that is relatively unexplored, in which a dynamic structural library can be contained within a single molecule. The 9-barbaralyl cation (1) is a hugely fluxional C9H9 + hydrocarbon that exists as a mixture of 181 400 degenerate forms which interconvert rapidly at temperatures as low as -135 °C-each carbon atom may exchange with every other carbon atom in the structure through a series of pericyclic reactions. Unlike the neutral homologues semibullvalene (2; two degenerate tautomers) and bullvalene (3; 1209600 degenerate tautomers), which are stable compounds under ambient conditions, 1 is highly reactive and undergoes irreversible rearrangement to 1,4-bishomotropylium cation (4) above -125 °C. Functionalized barbaralanes may be suitable candidates for switchable, fluxional molecules. However, the difficulty in handling these compounds coupled with the low-yielding, multistep syntheses and harsh reaction conditions (typically featuring strongly or super acidic media) employed in the generation of 1 and its derivatives have so far limited the extent to which the chemistry of this fascinating dynamic carbon skeleton has been explored.
