Figure 2
1H NMR spectra (400 MHz, DMSO-d6) of (A) complex 2H dissolved at ambient temperature; (B) of complex 2H at ∼373 K, showing the presence of complex 3 and free catechol 1; (C) of isolated crystals of 3 precipitated from DMSO at ambient temperature (* indicates the presence of residual 1). |