Phosphinsubstituierte Chelatliganden, IX [1]. NMR-Spektren und Kristallstruktur von Diphenyl(thio)phosphoryl-N,N-dimethylthioformamid / Phosphine Substituted Chelate Ligands, IX [1]. NMR Spectra and Crystal Structure of Diphenyl(thio)phosphoryl-N,N-dimethylthioformamide
Open Access
- 1 January 1984
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 39 (1) , 14-18
- https://doi.org/10.1515/znb-1984-0104
Abstract
The P=S and P=0 derivatives 2a, b of diphenylphosphino N,N-dimethylthioformamide (1) were obtained by addition of sulfur to 1 and by Arbusov reaction of Ph2POMe with Me2NC(S)Cl, respectively. The position of the cis-P N-methyl proton signal is markedly affected by the P = X group which exerts a diamagnetic shift for X = S (2a) but a paramagnetic shift for X = O (2b) relative to 1. Unusually small 3JPC couplings are observed in the 13C{1H} NMR spectrum. The P-sulfide 2 a crystallizes in the monoclinic space group C2/c with the lattice constants a = 1791.5(3) pm, b = 686.7(2) pm, c = 2591.3(4) pm, β = 93.10(4)°. The molecule structure is characterized by a planar thioamide unit with the P=S group forming an angle of 53.4° to the plane.Keywords
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