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UV-vis spectra of LMe2Cu-Ge[(NMes)2(CH)2] (1a) in THF (0.1 mM) at -80 °C (solid line), the immediate product of oxygenation (intermediate A, Scheme 4, dotted line), the species resulting after allowing intermediate A to stand for 10 minutes (intermediate B, dashed line), and the product resulting from warming of intermediate B to -65 °C (dot-dash line).
