Supporting Data for Synthesis and Magnetic Properties of Open-Shell Molecular Carbons Embedding Seven-Five-Seven (7-5-7) Membered Rings

<p dir="ltr">This research investigates seven–five–seven (7–5–7) membered ring-embedded molecular carbons with open-shell character. The work covers molecular design, synthesis, and structural confirmation, combined with spectroscopic, electrochemical, and magnetic measurements (continuous-wave electron paramagnetic resonance (cw-EPR), pulsed electron paramagnetic resonance (pulsed-EPR), superconducting quantum interference device<b> </b>(SQUID) and density functional theory (DFT) calculations. The findings reveal how non-hexagonal ring especially heptagons incorporation modulates electronic structures, stability, and magnetic properties, offering insights for applications in organic spintronics.</p>