Copper(I) binds carbon monoxide in a cubane-like structure: chemistry and X-ray crystal structure of tetrakis[(2-methylquinolin-8-olato)-carbonylcopper(I)]

Abstract

Copper(I) chloride reacts with a solution of sodium 2-methylquinolin-8-olate (qNa) in tetrahydrofuran under a pressure of 60 atm of CO at 65 °C to give a tetranuclear copper(I) carbonyl complex [Cu(q)(CO)]₄, (1), [ν(C–O), 2050 cm^–1], having a cubane-like structure, with S₄ symmetry, in which the copper atoms are bridged by the oxygen atom of the quinolinolato ligand.