25837-47-2Relevant academic research and scientific papers
Generation of nucleophilic chromium acetylides from gem-trichloroalkanes and chromium Chloride: Synthesis of propargyl alcohols
Dhurke, Kashinath,Steve, Tisserand,Narender, Puli,John R, Falck,Rachid, Baati
scheme or table, p. 1869 - 1874 (2010/07/18)
Nucleophilic mixed chromium(II) and chromium(III) acetylides are generated from the smooth reduction of primary 1,1,1-trichloroalkanes with chromium(II) chloride in the presence of an excess amount of triethylamine at room temperature. These species arise from chrornium(III) vinylidene carbenoids. It has been demonstrated that uncommon low-valent CrII acetylides are formed by C-H insertion of CrIICl2 into terminal alkynes, formed in situ through the FritschButtenberg-Wiechell (FBW) rearrangement, whereas CrIII acetylides are concomitantly generated by HCl elimination from the chromium(III) vinylidene carbenoid, Both divergent pathways result, overall, in the formation of nucleophilic acetylides. In situ trapping with electrophilic aldehydes afforded propargyl alcohols. Furthermore, deuteration experiments and the use of deuterium labeled 1,1,1-trichloroalkane substrates demonstrated the prevalence of low-valent Cr11 acetylides, potentially useful, yet highly elusive synthetic intermediates.
Matrix Absorption Spectra of the Radicals Formed by the Addition of Hydrogen Atoms to Phenylacetylene
Andrews, Lester,Kelsall, Benuel J.
, p. 1435 - 1440 (2007/10/02)
Codeposition of hydrogen atoms from a blind discharge with phenylacetylene in argon at 20 K gave two new products with absorptions at 314.4, 474.7 nm and 346.9, 614.4 nm, respectively.These bands exhibited different photolysis behavior and are grouped acc
