Characterization of Two Inorganic Compounds: (CO)5Cr^(R)NSNSNH

Laboratorium für Anorganische Chemie der Universität Bayreuth, Postfach 101251, D-8580 Bayreuth Z. Naturforsch. 42b, 703-706 (1987); received January 15, 1987 Reverse 2D 'H{N} NMR Spectra, Phosphane Complexes, Inorganic Ring System PS2N3, X-Ray The inorganic ring system RPNSNSNH linked to the [Cr(CO)5] fragment [R = T3u (1), NH2 (2)], has been studied by reverse two-dimensional, 2D , 'H{N} NMR spectroscopy. In solution, the exchange of the N —H hydrogen atoms is slow on the NMR time scale. Chemical shifts <3('H), <5(C), <5(P), <3(N) and coupling constants 7( 3 P H), J(PC), 7(PN) are reported. In the case of 2, the reduced coupling constants K( PN'H) and 'K(PN) have the same sign.