NMR spectroscopy edit

¹H-NMR edit

¹H-NMR (400 MHz, CD₃OD): /ρ = 8.07 (dd,³J = 2.5 Hz,⁴J = 1.1 Hz, 1H, C-6), 7.98 (dd,³J = 4.0 Hz,³J = 2.0 Hz, 1H, C-3), 7.23 (dd,³J = 2.5 Hz,³J = 2.0 Hz, 1H, C-5), 7.21 (dd,³J = 4.0 Hz,⁴J = 1.0 Hz, 1H, C-4).

¹³C-NMR edit

(100.57 MHz, CD₃OD): ρ = 155.9 (C-2), 140.8 (C-4), 138.3 (C-6), 125.8 (C-3), 124.4 (C-5)

UV/Vis spectroscopy edit

(MeOH):ν_max (lg ε) = 226.2 (0.44), 297.6 (0.30).

IR spectroscopy edit

(KBr): ν = 3440 cm⁻¹–1 (br, m), 3119 (m), 3072 (m), 2986 (m), 1682 (s), 1649 (vs), 1609 (vs), 1578 (vs), 1540 (s), 1456 (m), 1433 (m), 1364 (w), 1243 (m), 1156 (m), 1098 (m), 983 (m), 926 (w), 781 (s), 730 (w), 612 (w), 560 (w), 554 (w), 526 (m), 476 (m), 451 (w).

Mass spectrometry edit

EI-MS (70 eV): m/z (%) = 95 (100) [M⁺], 67 (35) [M⁺ - CO], 51 (4)[C₄H₃⁺].

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