Crystal structures of 6-[(2-hydroxy-1,1-bis-hydroxymethyl-ethylamino)-methylene]-4-nitro-cyclohexa-2,4-dienone hydrate (I) and 6-[(2-hydroxy-1,1-bis-hydroxymethyl-ethylamino)-methylene]-4-bromo-cyclohexa-2,4-dienone (II) have been determined. The crystals of I are monoclinic, a = 16.957(1) Å, b = 10.729(2) Å, c = 7.240(3) Å; β = 99.56(3)°, space group P21/c, Z = 4, R = 0.0492. The crystals of II are triclinic, a = 10.282(2) Å, b = 7.189(3) Å, c = 16.831(3) Å; α = 90.67(3)°, β = 100.10(3)°, γ = 95.87(3)°; space group P-1, Z = 4, R = 0.0591. The independent part of the unit cell of I contains one unique molecule and water of crystallization, while in II — two unique molecules A and B. C(CH2OH)3 fragment of the molecule B manifests the disordering of alcohol oxygen atoms. Both in I and II, the salicylidene fragment of the molecules exists in the quinoid tautomeric form.
6-[(2-羟基-1,1-双-羟甲基-乙基
氨基)-亚甲基]-4-硝基-环六-2,4-二烯酮
水合物(I)和6-[(2-羟基-1)的晶体结构,1-双-羟甲基-乙
氨基)-亚甲基]-4-
溴-环己-2,4-二烯酮(II)已被测定。 I的晶体为单斜晶系,a = 16.957(1) Å,b = 10.729(2) Å,c = 7.240(3) Å; β = 99.56(3)°,空间群 P21/c,Z = 4,R = 0.0492。 II晶体为三斜晶系,a = 10.282(2) Å,b = 7.189(3) Å,c = 16.831(3) Å; α=90.67(3)°,β=100.10(3)°,γ=95.87(3)°;空间群 P-1,Z = 4,R = 0.0591。 I 晶胞的独立部分包含一个独特的分子和结晶
水,而 II 中包含两个独特的分子 A 和 B。分子 B 的 C(CH2OH)3 片段体现了醇氧原子的无序性。在 I 和 II 中,分子的
水杨基片段均以醌型互变异构形式存在。