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- Title
A solid-state <sup>31</sup>P NMR study of 1:1 silver–triphenylphosphine complexes — Interpretation of <sup>1</sup>J(<sup>107,109</sup>Ag,<sup>31</sup>P) values<sup>1</sup><sup>,</sup><sup>2</sup>.
- Authors
Fu Chen; Se-Woung Oh; Wasylishen, Roderick E.
- Abstract
High-resolution solid-state 31P NMR spectroscopy was used to investigate a series of 1:1 silver–triphenylphosphine complexes, [Ph3PAgX]n, where X is a monovalent anion and n = 1, 2, 3, 4, or ∞. The 31P CP MAS NMR spectra reveal the number of distinct phosphorus sites in these complexes as well as the |1J(109Ag,31P)| values, which range from 401 ± 10 Hz (X = N3–) to 869 ± 10 Hz (X = SO3CF3–). The data obtained here and in earlier investigations indicate that |1J(109Ag,31P)| values for silver–tertiary phosphine complexes decrease as Ag–P bond lengths increase. This experimental conclusion is supported by DFT calculations, which also indicate that the Fermi-contact mechanism is the only important spin–spin coupling mechanism for 1J(109Ag,31P) in these complexes. In addition, the crystal structure of a silver–triphenylphosphine trifluoroacetate tetramer was determined using X-ray crystallography, and the structure of a silver–triphenylphosphine chloride tetramer was reinvestigated.
- Subjects
NUCLEAR magnetic resonance spectroscopy; SILVER; X-ray crystallography; SPECTRUM analysis; PHOSPHORUS compounds; CRYSTALLOGRAPHY
- Publication
Canadian Journal of Chemistry, 2009, Vol 87, Issue 7, p1090
- ISSN
0008-4042
- Publication type
Article
- DOI
10.1139/V09-076