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First true square-planar Hg(II) compound: synthesis and full characterization of trans-(Hg(Ph2PNP(O)Ph2-P,O)2 (Articolo in rivista)
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- First true square-planar Hg(II) compound: synthesis and full characterization of trans-(Hg(Ph2PNP(O)Ph2-P,O)2 (Articolo in rivista) (literal)
- Anno
- 2003-01-01T00:00:00+01:00 (literal)
- Alternative label
Haid, Rainer; Gutmann, Rene; Czermak, Georg; Langes, Christoph; Oberhauser, Werner; Kopacka, Holger; Ongania, Karl-Hans; Brueggeller, Peter (2003)
First true square-planar Hg(II) compound: synthesis and full characterization of trans-(Hg(Ph2PNP(O)Ph2-P,O)2
in Inorganic chemistry communications
(literal)
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- Haid, Rainer; Gutmann, Rene; Czermak, Georg; Langes, Christoph; Oberhauser, Werner; Kopacka, Holger; Ongania, Karl-Hans; Brueggeller, Peter (literal)
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- ISI Web of Science (WOS) (literal)
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- ICCOM-CNR
Institut fuer Allgemeine, Anorganische und Theoretische Chemie, Universitaet Innsbruck, Innrain 52a, 6020 Innsbruck, Austria (literal)
- Titolo
- First true square-planar Hg(II) compound: synthesis and full characterization of trans-(Hg(Ph2PNP(O)Ph2-P,O)2 (literal)
- Abstract
- The reaction of HgðO3SCF3Þ2 with bis(diphenylphosphino)amine, Ph2PNHPPh2 (dppam), produces the novel, rare face-to-face
complex ½Hg2ðO3SCF3Þ4ðdppamÞ2? (1). Treatment of 1 with Na2N2O3 leads to trans-½HgfPh2PNPðOÞPh2-P;Og2? (2) via regioselective
oxidation and simultaneous deprotonation of dppam. 2 is the first true square-planar Hg(II) compound. In 2 the coordination
plane and the five-membered rings of the HgNOP2 moieties are completely coplanar indicating strong p-bonding
interactions. Both 1 and 2 have been fully characterized by X-ray structure analyses, NMRspectroscopy
ð199Hgf1Hg; 31Pf1Hg; 13Cf1Hg; 1HÞ, ESI and FAB mass spectrometry, IRspectroscopy, elemental analyses, and melting points.
Since in Hg(II) compounds relativistic effects favour linear coordination and Hg(II) donor atom preferences play a significant role,
the Hg-P bond length of 2.4042(7) ?AA in 2 is short, whereas the Hg-O bond length of 2.7138(15) ?AA is long. In view of the X-ray
structures of 1 and 2, it is shown that the delocalized charge in ½Ph2PNPðOÞPh2?? is responsible for the achievement of the squareplanar
coordination in a Hg(II) compound. A similar p-bonding effect has been observed in several square-planar complexes of
Pt(II), Pd(II), and Ni(II) containing cis-1,2-bis(diphenylphosphino)ethene (cis-dppen). (literal)
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