561068-06-2Relevant academic research and scientific papers
Synthesis of a new, bulky tetraarylphosphonium, a tetraarylborate, and their salt
Matsumoto, Kaya,Hatano, Keiichiro,Umezawa, Naoki,Higuchi, Tsunehiko
, p. 2181 - 2185 (2007/10/03)
Tris(m-terphenyl-5′-yl)phosphine (2), tetrakis(m-terphenyl-5′- yl)phosphonium bromide (3), sodium tetrakis(m-terphenyl-5′-yl)borate (4), and the phosphonium borate salt 5 of 3 and 4 were synthesized, in the expectation of creating interionic spacings that
Rate enhancement with a bowl-shaped phosphane in the rhodium-catalyzed hydrosilylation of ketones
Niyomura, Osamu,Tokunaga, Makoto,Obora, Yasushi,Iwasawa, Tetsuo,Tsuji, Yasushi
, p. 1287 - 1289 (2007/10/03)
Up to 154-fold rate enhancement (see picture) and higher yields are achieved with the bowl-shaped triarylphosphane ligand P(tm-tp)3 compared with common phosphane ligands in Rh-catalyzed hydrosilylation of ketones. The superior performance of P(tm-tp)3 over the similar P(tp)3 is apparently related to the deeper bowl formed by the methyl-bearing terphenyl substituents in the former.
