“…Dimenthyl H‐Phosphonate: 26 After kugelrohr distillation, 4.39 g (49 %) of a clear liquid was obtained. 1 H NMR (400 MHz, CDCl 3 ): δ = 6.91 (d, 1 J HP = 686.8 Hz, 1 H), 4.28–4.18 (m, 2 H), 2.20–2.16 (m, 2 H), 2.15–2.04 (2 m, 2 H), 1.69, 1.65 (2 br.…”