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195 Pt and 1 H NMR studies of platinum(II) complexes with ethylenediamine derivatives
Author(s) -
Rochon F. D.,
Morneau André
Publication year - 1991
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260290205
Subject(s) - ethylenediamine , chemistry , platinum , nmr spectra database , resonance (particle physics) , proton nmr , diamine , spectral line , carbon 13 nmr , crystallography , stereochemistry , medicinal chemistry , inorganic chemistry , polymer chemistry , organic chemistry , catalysis , physics , particle physics , astronomy
Complexes of the types Pt(L)Cl 2 , [Pt(L)(D 2 O) 2 ](NO 3 ) 2 , [Pt(L)(D 2 O)(NO 3 )](NO 3 ), Pt(L)(OD) 2 , [Pt(L)(D 2 O)Cl] + and Pt(L)(OD)Cl, where L = ethylenediamine, N , N ‐dimethylethylenediamine, N , N ′‐dimethylethylenediamine and N , N , N ′, N ′‐tetramethylethylenediamine, were characterized mainly by 195 Pt and 1 H (high‐ and low‐field) nuclear magnetic resonance. The NMR spectra were measured in D 2 O. The dichloro complexes showed a 195 Pt resonance between −2355 and −2433 ppm (relative to Na 2 PtCl 6 ) whereas the diaqua compounds absorbed at lower field from −1821 to −1977 ppm. The signals of the monoaqua‐monochloro species were observed at intermediate field between −2030 and −2173 ppm. The dihydroxo complexes showed a resonance at lower field (about 100 ppm) than the diaqua compounds, whereas the monochloro‐monohydroxo species absorbed at about 50 ppm from the monoaqua‐monochloro species. The monoaqua‐mononitrato compounds with only two ligands absorbed at about −20 ppm from the diaqua species. The high‐field proton NMR spectra of the complexes were also measured. The 195 Pt– 1 H coupling constants were obtained from the low‐field proton NMR spectra.