Fig. 2
From: Hydrogen bonds to Au atoms in coordinated gold clusters

Comparison of the Au6 cluster and the reference complex. a, b 1H NMR spectra of 1·(PF6)2 (a) and 3 (b) in CD2Cl2 at 24 °C. The assignments for the phenylene-bridge protons are shown. The arrow indicates the downfield shift of the H-2 proton signals. The other unlabeled signals are due to the P-Ph protons