Prikazana su iskustva u primjeni biološkog monitoringa profesionalne izloženosti benzenu, toluenu, ksilenu, stirenu, trikloretilenu i tetrakloretilenu. Istaknuta je važnost pravilnog odabira ...pokazatelja, medija i vremena uzorkovanja. Uspoređena su vlastita istraživanja s postojećim biološkim graničnim vrijednostima te je naglašena potreba za njihovom realnom primjenom u svrhu zaštite zdravlja radnika.
The silver-mediated C-H trifluoromethylation of aromatic substrates using TMSCF(3) is described. The development, optimization, and scope of these transformations are reported. AgCF(3) intermediates ...are proposed.
Hochaufgelöste Röntgenbeugungsdaten liefern mit Hilfe des Multipolmodells Informationen über Bindungselektronendichte. Über die graphische Darstellung des elektrostatischen Potentials kann man ...nukleophile und elektrophile Zentren in einem Molekül identifizieren. Die Quantentheorie von Atomen in Molekülen (QTAIM) ermöglicht die Berechnung von Atomladungen, Charakterisierung von Bindungen und die Visualisierung von Bindungselektronen‐ und freien Elektronenpaaren. Das Konzept wird an den beiden Beispielstrukturen Benzol und Oxalsäure‐Dihydrat verdeutlicht.
Silyl triflate precursors to benzyne and related intermediates have emerged as valuable synthetic building blocks. However, data addressing the safety of employing these silyl triflate precursors are ...lacking. We report the calorimetric analysis of a typical Kobayashi procedure for forming and trapping benzyne using a silyl triflate precursor. Our findings suggest that, unlike benzenediazonium carboxylate precursors to benzyne, silyl triflates may be employed under mild conditions without severe concern for runaway reaction.
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