Preparation of [²H]‐paraformaldehyde

Abstract

SUMMARY

Dispersed fluorescence spectroscopy of S0 vibrational levels in formaldehyde-d

“…HDCO polymer was prepared in a four-step synthesis based on previous work by Atkinson et al [13] and Ouzounian et al [14]. First, bromoform-d (CDBr 3 ) was produced by a substitution reaction with bromoform (CHBr 3 ) and deuterium oxide (D 2 O).…”

Relative Reaction Rates of HCHO, HCDO, DCDO, H13CHO, and HCH18O with OH, Cl, Br, and NO3 Radicals

“…The monodeuterated formaldehyde was prepared from deuterated bromoform. 24 The paraformaldehyde samples were heated to produce gaseous formaldehyde monomers and flushed into the reaction chamber with synthetic air via a Pyrex gas-handling system. The pressures of the reactants were measured in a standard volume on the gas line using a 10 mbar range capacitance manometer.…”

“…% 18 O, from Campro Scientific). The monodeuterated formaldehyde was prepared from deuterated bromoform . The paraformaldehyde samples were heated to produce gaseous formaldehyde monomers and flushed into the reaction chamber with synthetic air via a Pyrex gas-handling system.…”

Synthesis of [2H]‐diethoxymethane as a convenient source of a [2H]‐methylene unit

“…[2H]-paraformaldehyde is commercially available,(5) it is costly. Anet recently reported the synthesis of [2H]-paraformaldehyde in four steps with an overall yield of 25%, (6) and his method has been followed successfully in our laboratory. However, we have also found it possible to use 1 as an in situ source of 2 in the Diels Alder reaction mentioned above.…”

“…The remaining brown liquid is distilled to give (0.79 g, 3.9 mmol, 32% based on cyclohexadiene) of the product as a colorless liquid (hp 130-155 OC/10 mm). 'H NMR(9) (300 MHz, CDClgMS):6 1.15-2.01 (m, 4H), 1.97 and 2.98 (m, lH, CHD), 2.48 (m, lH, CHD-CH), 3.33 (m, lH, N-CH), 3.48 (AJ3g J = 13.2 Hz, Ph-CHz), 6.26 (m, lH, C = CH), 6.42 (m, lH, C = CH), 7.19-7.36 (m, 5H, C6H5). I3C NMR(9) (75.4 MHz, CDC13mMS): 6 c 22.09 (C7), 26.80 and 26.82 (C8), 30.82 (C4), 51.19 (Cl), 55.14 (t, JCD 21.3 Hz, C3), 62.01 and 62.08 (PhCH2), 126.65, 128.10, 128.82 and 139.86 (CgHg), 131.79 and 131.76 (CS), 133.41 (C6).…”