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Although there are many conceivable ways to functionalize, and specifically carboxylate, 2-chloro-4-(trifluoromethyl)pyridine optionally at all three vacant positions, it is more straightforward to prep. only 2-chloro-4-(trifluoromethyl)pyridine-3-carboxyl ...
Using in situ generated iodine fluoride as the reagent, bromine can be replaced by fluorine at carbocation-sustaining sites. Iodine fluoride or, being its operational equiv., the mixt. of N-iodosuccinimide and triethylamine tris(hydrogen fluoride) reacts w ...
To demonstrate the superiority of modern organometallic methods, the inexpensive starting material 1,3-difluorobenzene has been selectively converted into the three benzoic acids and all seven bromobenzoic acids contg. the two fluorine atoms in homovicinal ...
4-Bromo-6-fluoro-2-(trifluoromethyl)quinoline and 4-bromo-7-fluoro-2-(trifluoromethyl)quinoline were selected as model substrates to explore under what conditions regiochem. exhaustive functionalization reactions can be carried out. This goal was achieved ...
The cond. and solar cell performance of metal iodide-doped trialkylsulfonium iodides and polyiodides were studied as electrolytes in dye-sensitized nanocryst. solar cells (DNSCs). Nine different metal-iodide-contg. (R2R'S)I with addnl. iodine provided over ...
Resonance Raman scattering studies of a complete dye-sensitized solar cell (DSC) including iodine and lithium iodide in the electrolyte indicate that triiodide (I3-) exchange the SCN- ligand of the dye bis(tetrabutylammonium) cis-bis(thiocyanato)bis(2,2'-b ...
A systematic comparison between 1,3-difluorobenzene, 1,3-dichlorobenzene, and 1,3-dibromobenzene did not reveal major differences in their behavior towards strong bases such as lithium diisopropylamide or lithium 2,2,6,6-tetramethylpiperidide. Thus, all 2, ...
The conversion of 2,2-difluoro-1,3-benzodioxole, an exceptionally acidic arene, via a 4-lithiated intermediate into more than three dozen new derivs. was conceived as a case study. The lithiated species was trapped by C0-electrophiles (4-toluenesulfonyl az ...
Dye-sensitized nanocrystalline solar cells (DSC) have received considerable attention as a cost-effective alternative to conventional solar cells. One of the main factors that has hampered widespread practical use of DSC is the poor thermostability encount ...
We have investigated the doping mechanism of pentacene with iodine and its impact on the structure and on the electronic properties of single crystals, powders, and thin films in a large range of iodine concentration up to six iodine per pentacene (PEN) mo ...
