The first non-calamitic/disc-shaped metal organyl series3and6containing two or even four palladium atoms and eight or twelve flexible side chains presented here have been synthesized via the novel roof-shaped/bent dimers2or (the thermomesomorphic)5, respectively. In addition, from the chemical point of view the dodecaethers5and6a-care the first derivatives of four novel, uniquely structured tetrapallado-macroheterocycles. Whereas the type of mesophase of5is still not distinctly clear yet those ones of6a-care enantiotropicdiscotic hexagonal columnar(Dh) over a wide range of temperature. On the other hand, the dinuclear palladocompounds3a-drepresent the first (monotropic) cases of metallomesogens exhibiting thenematic-discotic(ND) phase. This thermotropic nematic type of phase clearly gets stabilized by doping3c, dwith a strong electron acceptor; under such circumstances mesophase conversions/inductions (ND→Dh) are observed in the cases of3a-c.Finally, it is important to emphasize that the very large, thermotropically Dhphase displaying macroheterocycles6a-care alsolyotropicin various organic solvents exhibiting now anematicphase.