Extension of the Karplus relationship to vicinal coupling within the P–Ru–S–H moiety of the H2S complexes cis-RuX2(P–N)(PPh3)(SH2) {X = Cl, Br; P–N = [o-(N,N-dimethylamino)phenyl]diphenylphosphine}

Abstract

The Ru(II)–H₂S complexes cis-RuX₂(P–N)(PPh₃)(SH₂) {X = Cl, Br; P–N = [o-(N,N-dimethylamino)phenyl]diphenylphosphine} are characterised crystallographically and by ³¹P{¹H}, ¹H and ¹H{³¹P} NMR spectroscopies; the ¹H NMR spectra at –50 °C show three-bond coupling of only one H-atom of the coordinated H₂S to the P-atom of the P–N ligand, and this represents an extension of the Karplus relationship to vicinal coupling within a P–Ru–S–H system.