Boron Isotope Exchange between Boron Fluoride and Its Alkyl Halide Complexes. II.1Infrared Spectrum of Boron Fluoride-Methyl Fluoride Complex

1966 ◽  
Vol 70 (4) ◽  
pp. 1146-1150 ◽  
Author(s):  
Ryohei Nakane ◽  
Toshiyuki Ōyama
BioMetals ◽  
2017 ◽  
Vol 30 (6) ◽  
pp. 933-944 ◽  
Author(s):  
Yasin Tülüce ◽  
Pawan Tareq Ahmed Lak ◽  
İsmail Koyuncu ◽  
Ahmet Kılıç ◽  
Mustafa Durgun ◽  
...  

1974 ◽  
Vol 52 (16) ◽  
pp. 2880-2888 ◽  
Author(s):  
Joseph I. Bullock ◽  
Frederick W. Parrett ◽  
Nicholas J. Taylor

Titanium tetrachloride reacts rapidly with trichloro-, tribromo- and methyldichlorophosphine in the presence of t-butyl chloride to give compounds containing a phosphonium cation R1R2PX2+ (R1 = t-butyl, R2 = chloride, bromide, or methyl, X = chloride or bromide) and the principal metal-containing anion, Ti2Cl9−. For tribromophosphine and t-butyl chloride a stoichiometric product, [ButPBr3][Ti2Cl9] was obtained which was characterized using vibrational spectroscopy. The other reactions gave non-stoichiometric materials, the sublimates of which may contain higher polymeric anions whilst the residues contained TiCl5− along with the parent dimeric anion.Zirconium tetrachloride and titanium tetrabromide reacted in a similar way to give the new ions Zr2Cl9− and Ti2Br9− in stoichiometric reactions.


2020 ◽  
Author(s):  
Jamey Bower ◽  
Andrew Cypcar ◽  
Brenda Henriquez ◽  
S. Chantal E. Stieber ◽  
Shiyu Zhang

<p>Despite the growing interest in the synthesis of fluorinated organic compounds, few methods are able to incorporate fluoride ion directly into alkyl C-H bonds. Here, we report the C(sp<sup>3</sup>)-H fluorination reactivity of a formally copper(III) fluoride complex. The C-H fluorination intermediate, <b>L</b>CuF, along with its chloride and bromide analogs, <b>L</b>CuCl and <b>L</b>CuBr, were prepared directly from halide sources with a chemical oxidant and fully characterized. While all three copper(III) halide complexes capture carbon radicals efficiently to afford C(sp<sup>3</sup>)-halogen bonds, <b>L</b>CuF is two orders of magnitude more efficient at hydrogen atom abstraction (HAA) than <b>L</b>CuCl and <b>L</b>CuBr. Alongside reported kinetic data for other <b>L</b>Cu(III) species, we established a positive correlation between ligand basicity and the rate of HAA. The capability of <b>L</b>CuF to perform both hydrogen atom abstraction and radical capture was leveraged to enable fluorination of allylic and benzylic C-H bonds and α-C-H bonds of ethers at room temperature.</p>


Sign in / Sign up

Export Citation Format

Share Document