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首页> 外文期刊>Acta crystallographica. Section C, Structural chemistry. >Structures and phase transition of three isomers of 1‐phenylindolin‐2‐one derivatives: 6‐chloro‐1‐phenylindolin‐2‐one, 4‐chloro‐1‐phenylindolin‐2‐one and 1‐(3‐chlorophenyl)indolin‐2‐one
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Structures and phase transition of three isomers of 1‐phenylindolin‐2‐one derivatives: 6‐chloro‐1‐phenylindolin‐2‐one, 4‐chloro‐1‐phenylindolin‐2‐one and 1‐(3‐chlorophenyl)indolin‐2‐one

机译:1-苯基吲哚嗪-2-一种衍生物的三个异构体的结构和相转变:6-氯-1-苯基吲哚嗪-2-一,4-氯-1-苯基吲哚-2-1和1-(3-氯苯基)吲哚啉 - 2-一

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Three 1‐phenylindolin‐2‐one derivatives, namely 6‐chloro‐1‐phenylindolin‐2‐one ( A ), 4‐chloro‐1‐phenylindolin‐2‐one ( B ) and 1‐(3‐chlorophenyl)indolin‐2‐one ( C ), all C 14 H 10 ClNO, have been synthesized and the structures of these compounds at room temperature ( A RT , B RT and C RT ) and low temperature ( A LT , B LT and C LT ) have been determined. Crystal A at 295?K ( A RT ) crystallized in the monoclinic space group P 2 1 / c and the phenyl ring of the unique molecule exhibits disorder over two positions. At low temperature, the disorder disappeared and crystal A at 90?K ( A LT ) crystallized in the triclinic space group P with a doubled unit‐cell volume and four molecules in the asymmetric unit. Density functional theory (DFT) calculations revealed a low oscillation barrier (0.24 kcal mol ?1 ) of the phenyl ring of molecule A and the phase transition from the P 2 1 / c structure to the P structure can be interpreted in terms of the freezing out of the two conformations at low temperature. Crystal B retains space group P 2 1 / c in the temperature range from 100 to 297?K. A kind of obtuse‐cell to acute‐cell change can be recognized; if the unit cell of B LT at 100?K is set to be a standard obtuse cell [β = 90.341?(2)°] and the cell is kept untransformed in the course of temperature changing, the cell of B RT at 297?K was found to be acute [β = 89.288?(2)°]. The molecules in structure C are packed in layers, with C—H…O hydrogen bonds between neighbouring layers.
机译:三个1-苯基吲哚嗪-2-一种衍生物,即6-氯-1-苯基吲哚键-2-一(a),4-氯-1-苯基吲哚键-2-一(b)和1-(3-氯苯基)吲哚啉 - 已经合成了2-一(c),所有C 14H 10 ClNO,并且在室温(RT,B RT和C RT)和低温(A LT,B和C LT)时,这些化合物的结构具有已经确定了。在单斜晶间空间组P 2 1 / C中结晶的295〜k(一个RT)和独特分子的苯环具有两个位置的苯环。在低温下,该疾病消失,在三星间空间组P中结晶的90 k(A LT)消失,在三角形空间组P中结晶,其在不对称单元中的四个分子。密度函数理论(DFT)计算揭示了分子A的苯环的低振荡屏障(0.24kcal摩尔→1),并且可以在冻结方面解释从P 2 1 / C结构的相变到P结构的相转变在低温下两个构象。 Crystal B在100至297 k的温度范围内保留空间组P 2 1 / C.可以识别出一种血液细胞到急性细胞的变化;如果将B LT的单位细胞设定为标准钝电池[β= 90.341〜(2)°],并且在温度变化过程中,该电池保持不变,在297时,B RT的电池在297℃。 k被发现是急性[β= 89.288吗?(2)°]。结构C中的分子以相邻层之间的C-H ... O氢键填充。

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