Intramolecular interactions in a heterometallic copper( ii )–lead( ii ) tetranuclear β-diketonate complex: insights from thermodynamics, molecular spectroscopy and quantum chemical calculations

A Cu–Pb tetranuclear heterometallic complex with high volatility and stability sublimes as an intact binuclear unit. Key Cu–Pb donor–acceptor and weak Cu–O(Pb) interactions reflect on the IR spectrum, interpreted up to the far region.