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Träfflista för sökning "AMNE:(ENGINEERING AND TECHNOLOGY) AMNE:(Chemical Engineering) AMNE:(Chemical Process Engineering) srt2:(1982-1984)"

Search: AMNE:(ENGINEERING AND TECHNOLOGY) AMNE:(Chemical Engineering) AMNE:(Chemical Process Engineering) > (1982-1984)

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  • Helm, Lothar, et al. (author)
  • Water Exchange Mechanism of Tetraaquapalladium(II). A Variable Pressure and Variable Temperature Oxygen-217 NMR Study
  • 1984
  • In: Helvetica Chimica Acta. - : Wiley. - 0018-019X .- 1522-2675. ; 67:6, s. 1453-1460
  • Journal article (peer-reviewed)abstract
    • Water exchange of square-planar Pd(H2O)42+ has been studied as a function of temperature (240 to 345 K) and pressure (0.1 to 260 MPa, at 324 K) by measuring the 17/O-FT-NMR line-widths of the resonance from coordinated water at 27.11 and 48.78 MHz. The following exchange parameters were obtained: k298ex = (560 ± 40) s−1, ΔH* = (49.5 ± 1.9) kJ mol−1, ΔS* = – (26 ± 6) J K−1 mol−1 and ΔV* = – (2.2 ± 0.2) cm3 mol−1. The values refer to an aqueous perchlorate medium with an ionic strength between 2.0 and 2.6 m and a perchloric acid concentration between 0.8 and 1.7 m, and are interpreted in terms of an associative (a) activation for the exchange. The exchange rate for Pd(H2O)42+ is 1.4 × 106 times faster than for Pt(H2O)42+ at 298 K. A comparison with reactions between other nucleophiles and Pd(H2O)42+ is also made.
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  • Result 1-2 of 2
Type of publication
reports (1)
journal article (1)
Type of content
other academic/artistic (1)
peer-reviewed (1)
Author/Editor
Nilsson, Lars (1)
Helm, Lothar (1)
Elding, Lars Ivar (1)
Merbach, Andre E. (1)
University
Luleå University of Technology (1)
Lund University (1)
Language
Swedish (1)
English (1)
Research subject (UKÄ/SCB)
Engineering and Technology (2)
Natural sciences (1)

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