855313-97-2Relevant academic research and scientific papers
η1:η2-alkynyl-bridged W-Si complexes: Formation, structure, and reaction with acetone
Sakaba, Hiroyuki,Yoshida, Mako,Kabuto, Chizuko,Kabuto, Kuninobu
, p. 7276 - 7277 (2005)
Reactions of (η5-C5Me4R)(CO)2(MeCN)WMe (R = Me, Et) with HPh2SiC≡CtBu gave the novel alkynyl-bridged W-Si complexes, (η5-C5Me4R)(CO)2W(μ-η1
Reactions of tungsten acetylide-silylene complexes with pyridines: Direct observation of silylene/silyl migration in tungsten acetylide and carbyne/vinylidene frameworks
Sakaba, Hiroyuki,Oike, Hiroyuki,Arai, Yasuhiro,Kwon, Eunsang
, p. 8172 - 8177 (2013/02/22)
Reaction of acetylide-silylene complex Cp*(CO)2W(SiPh 2)(CCtBu) (1a) with 4-(dimethylamino)pyridine (DMAP) gave an equilibrium mixture of DMAP-stabilized silylene acetylide complexes trans- and cis-Cp*(CO)2W(SiPh2·DMAP)(CC tBu) (trans-4 and cis-4). The corresponding reaction using Cp*(CO)2W(SiPh2)(CCSiMe3) (2) produced the novel DMAP-coordinated silenylcarbyne/silylvinylidene complex Cp*(CO)2W[CC(SiPh2·DMAP)(SiMe3)] (6a) as a major product, which was equilibrated with trans- and cis-Cp*(CO)2W(SiPh2·DMAP)(CCSiMe 3) (trans-5a and cis-5a) via silylene/silyl migration. The novel structures of cis-4 and 6a were revealed by X-ray crystallography. A mixture of 2 and pyridine exhibited interesting temperature-dependent NMR spectral changes, indicating the formation of trans- and cis-Cp*(CO)2W(SiPh 2·py)(CCSiMe3) (trans-5b and cis-5b) and Cp*(CO)2W[CC(SiPh2·py)(SiMe3)] (6b) at low temperature, while a mixture of 1a and pyridine showed no such spectral changes.
