Three-component self-assembly of a cis-blocked 90° Pd(II) acceptor with a mixture of a tetraimidazole and a linear dipyridyl donor self-discriminated into unusual Pd8 molecular swing (1) and Pd6 molecular boat (2), which are characterized by single-crystal X-ray diffraction analysis; their ability to bind C60 in solution is established by fluorescence titration. © 2012 Royal Society of Chemistry.