The title compounds, 2-[tris(hydroxymethyl)methyl]aminomethylene}cyclohexa-3,5-dien-1(2H)-one, C11H15NO4, (I), 6-hydroxy-2-[tris(hydroxymethyl)methyl]aminomethylene}cyclohexa-3,5-dien-1(2H)-one, C11H15NO5, (II), and 6-methoxy-2-[tris(hydroxymethyl)methyl]aminomethylene}cyclohexa-3,5-dien-1(2H)-one, C12H17NO5, (III), adopt the keto–amine tautomeric form, with the formal hydroxy H atom located on the N atom, and the NH group and oxo O atom display a strong intramolecular N—H...O hydrogen bond. The N—H...O hydrogen-bonded rings are almost planar and coupled with the cyclohexadiene rings. The carbonyl O atoms accept two other H atoms from the alcohol groups of adjacent molecules in (I), and one from the alcohol and one from the phenol group in (II), but from only one alcohol H atom in (III).
标题化合物,2-[三(羟甲基)甲基]氨基亚甲基}环己-3,5-二烯-1(2H)-酮,C11H15NO4,(I),6-羟基-2-[三(羟甲基)甲基]氨基亚甲基}环己-3,5-二烯-1(2H)-酮,C11H15NO5,(II)、和 6-甲氧基-2-[三(羟甲基)甲基]氨基亚甲基}环己-3,5-二烯-1(2H)-酮,C12H17NO5,(III),采用酮胺同分异构体形式,形式羟基 H 原子位于 N 原子上,NH 基团和氧 O 原子显示出很强的分子内 N-H。.O氢键。N-H...O 氢键环几乎是平面的,并与环己二烯环耦合。在(I)中,羰基 O 原子从相邻分子的醇基中接受另外两个 H 原子,在(II)中从醇基和苯酚基中各接受一个 H 原子,但在(III)中只从一个醇 H 原子接受 H 原子。