Monitoring stationary source emissions for heavy metals generally requires the use of quartz filters to collect samples because of the high temperature and high moisture sampling environment. The documentary standard method sample preparation technique in Europe, EN 14385, uses digestion in hydrofluoric acid and nitric acid (HF/HNO3) followed by complexing with boric acid (H3BO3) prior to analy...

We have examined the direct arylation of imidazolinone (1) with 6 different palladium sources, 15 different phosphine ligands, 12 different bases and 14 different solvent systems. There is no significant difference between using Pd(OAc)2 and Pd(TFA)2. This reaction proceeds less efficiently or reproducibly with Pd2(dba)3/(o-biphenyl)PCy2, O=PCy3, O=PPh3, P(OMe)3, PCy3·HBF4, PCy3, PPBu /DMF, NMP...

Using an assembly method, dinuclear CoCo and CoFe complexes supported by a bdt ligand, [Cp*Co(μ-η2:η2-bdt)(μ-I)CoCp*][PF6] (1[PF6], Cp* = η5-C5Me5, bdt = benzene-1,2-dithiolate), and [Cp*Co(μ-η2:η4-bdt)FeCp'][PF6] (3[PF6], Cp' = η5-C5Me4H) were synthesized in high yields. Upon chemical reduction with CoCp2, complexes 1[PF6] and 3[PF6] were converted to [Cp*Co(μ-η2:η2-bdt)CoCp*] (2) and [Cp*Co(μ...

A set of fluorophenyl-substituted adt-bridged Fe2S2 active site models of Fe-only hydrogenase, [(micro-SCH2)2NR]Fe2(CO)6 (, R=C6F4CF3-p; , R=C6H4CF3-p) and [(micro-SCH2)2NR]Fe2(CO)5(PPh3) (, R=C6F4CF3-p; , R=C6H4CF3-p), have been synthesized and well characterized. Spectroscopic and electrochemical studies demonstrate that the aryl-substituted complexes are stable toward a strong acid HBF4/Et2O...

The synthesis of 2-α-styrylpyridines has been carried out by using the coupling of polyoxygenated N-tosylhydrazones with various 2-halopyridines. We demonstrated that the use of a catalytic amount of PdCl2(MeCN)2 in combination with a bidentate ferrocene DPPF or a monodentate alkyl phosphine (t)Bu2MeP-HBF4 constitutes an efficient protocol for this coupling, providing 2-α-styrylpyridines 2 in s...

with P(OEt)3 and PPh(OEt)2 Phosphite Ligands G. ALBERTIN, S. ATONIUTTI, C. BUSATO, J. CASTRO and S. GARCIA-FONTÁN, Dalton Trans., 2005, (15), 2641–2649 [PtH{P(OEt)3}4]BF4 was obtained by the reaction of Pt{P(OEt)3}4 with HBF4·Et2O at –80oC. Protonating Pt{PPh(OEt)2}4 gave [PtH{PPh(OEt)2}4]BF4 or [PtH{PPh(OEt)2}3]Y (Y = BF4, CF3SO3, Cl). Complexes PtHClP2 (P = P(OEt)3, PPh(OEt)2) were obtained f...

A novel α,β-unsaturated iminium salt (3) incorporated into a rigid dibenzobarrelene backbone was synthesized by heating N-(anthracen-9-ylmethyl)-2,6-diisopropylaniline (2) and 3-phenyl-2-propynal in THF the presence of excess amounts magnesium sulfate 0.5 equivalents an HBF4-Et2O complex. The molecular structure 3 characterized unambiguously NMR spectroscopy single-crystal X-ray diffraction (SC...