Abstract

The reaction of 1 mole of melamine with 2 moles of acetic anhydride leads to diacetylmelamine (DAM), which is a mixture of two constitutional isomers: 90% <i>N,N'</i>-DAM and 10% <i>N,N'</i>-DAM. The reaction of 1 mole of DAM with 1-8 moles of oxiranes (ethylene and propylene oxides) was studied by ¹H NMR spectroscopy. At the molar ratio of substrates 1: ~ 2, no <i>N,N'</i>-diacetyl- <i>N,N'</i>-bis(2-hydroxyalkyl)melamine was formed, but the product of its intramolecular rearrangement, <i>N,N'</i>-bis(2-acetyloxyalkyl)melamine, was found. The latter reacted with the excess of oxiranes to appropriate tetrafunctional polyetherols containing s-triazine rings.

Energy Distribution Among Reaction Products: H + SCl₂ → HCl + SCl

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Rotational nonequilibrium mechanisms in pulsed H₂ + F₂ chain reaction lasers. 1: Effect on gross laser performance parameters

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Molecular Beam Studies of Internal Excitation of Reaction Products

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Formation of Vibrationally Excited OH by the Reaction H + O₃

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Energy Distribution Among Reaction Products. III: The Method of Measured Relaxation Applied to H + Cl₂

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