Galletti

Publications (2)16.24 Total impact

• Article: Solvation of the Carbonyl Compound as a Predominant Factor in the Diastereofacial Selectivity of Nucleophilic Addition.

  G Cainelli, P Galletti, D Giacomini, P Orioli
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  ABSTRACT: Temperature-dependent selectivity in nucleophilic additions is affected by the solvent. The inversion temperature (marked with arrows in the graph) that appears in the nonlinear Eyring plots of ln (anti/syn) versus temperature for the addition of butyllithium to an O-protected alpha-hydroxy aldehyde 1 does not depend on nucleophiles (nBuLi (black triangle), tBuLi (*)), but on the solvent. Its value can be obtained from a plot of the (13)C NMR chemical shift of C=O versus temperature. TBDMS=tBuMe(2)Si.
  Angewandte Chemie International Edition 03/2000; 39(3):523-527. · 13.45 Impact Factor
• Article: Solid-phase microextraction gas chromatography/mass spectrometric analysis of volatile organic compounds in water

  P Bocchini, C Andalo, D Bonfiglioli, GC Galletti
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  ABSTRACT: In this work, a solid-phase microextraction (SPME) method for the extraction of volatile organic compounds (VOCs) from water samples has been developed. Fifty-five volatile compounds (from the sixty listed in EPA method no. 524.2) were extracted from aqueous solutions using an SPME fiber coated with Carboxen-polydimethylsiloxane (Carboxen-PDMS), 75 &mgr;m film thickness. Time of sampling and chromatographic separation conditions were optimised. Standard solutions of VOC mixtures with concentrations as low as 0.05 ppb were analysed and their signal/noise ratios measured. Linearity of response for each component of the mixture was tested and mass spectral quality evaluated. A comparison with purge and trap analysis of VOCs was made. The method was applied to real-world samples of drinking, surface and leaching waters. Copyright 1999 John Wiley & Sons, Ltd.
  Rapid Communications in Mass Spectrometry 02/1999; 13(21):2133-9. · 2.79 Impact Factor