Fig. 3: Negative-ion ESI mass spectra.
From: A sandwich-type cluster containing Ge@Pd3 planar fragment flanked by aromatic nonagermanide caps

a Spectrum of {(Ge9)2[η6-GePd3]}− fragment. b Spectrum of {[K3(2,2,2-crypt)]{(Ge9)2[η6-Ge(PdPPh3)3]}− fragment. Top: measured spectrum. Bottom: calculated spectrum.