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首页> 外文期刊>Journal of chemical crystallography >Low Temperature Crystal Structure of 5-Hydroxy-1,7-Bis-(4-Hydroxy-3-Methoxy-Phenyl)-Hepta-1,6-Dien-3-one
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Low Temperature Crystal Structure of 5-Hydroxy-1,7-Bis-(4-Hydroxy-3-Methoxy-Phenyl)-Hepta-1,6-Dien-3-one

机译:5-Hydroxy-1,7-Bis-(4-Hydroxy-3-Methoxy-Phenyl)-Hepta-1,6-Dien-3-one的低温晶体结构

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The title compound 5-Hydroxy-1,7-bis-(4-hydroxy-3-methoxy-phenyl)-hepta-1,6-dien-3-one crystallizes in orthorhombic space group Pca2 1 with two molecules in the asymmetric unit. The unit cell parameters are: a = 35.5368(8), b = 7.7799(2), c = 12.6796(3) ?, D calc = 1.396 Mgm ?3, V = 3505.6(2) ? 3 and Z = 8. The two aromatic rings in both the molecules are found almost coplanar, their dihedral angles are 18.8° and 13.8°, respectively. The molecular packing is stabilized by strong O-H···O and C-H···O types of hydrogen bonding interactions. The keto and enol groups form an strong O-H···O intra-molecular interaction in both molecules of asymmetric unit. The molecular alignment in the crystal forming a staircase type of stacking through cross link intermolecular interactions. Graphical Abstract [Graphical abstract: Crystal structure analysis of 5-Hydroxy-1,7-bis-(4-hydroxy-3-methoxy-phenyl)-hepta-1,6-dien-3-one crystallizes in orthorhombic space group Pca2 1, with two molecules in the asymmetric unit and it is a new polymorph of curcumin. The unit cell parameters are: a = 35.5368(8), b = 7.7799(2), c = 12.6796(3) ?, D calc = 1.396 Mgm ?3, V = 3505.6(2) ? 3 and Z = 8. The molecular packing is stabilized by O-H···O and C-H···O types of hydrogen bonding interactions.]
机译:标题化合物5-羟基-1,7-双-(4-羟基-3-甲氧基-苯基)-庚-1,6-二烯-3-酮在正交空间群Pca2 1中结晶,两个分子在不对称单元中。晶胞参数为:a = 35.5368(8),b = 7.7799(2),c = 12.6796(3)δ,D calc =1.396Mgmδ3,V = 3505.6(2)δ。 3和Z =8。两个分子中的两个芳环几乎共面,其二面角分别为18.8°和13.8°。分子堆积通过强的O-H··O和C-H···O型氢键相互作用而稳定。酮基和烯醇基团在两个不对称单元的分子中形成强烈的O-H···O分子内相互作用。晶体中的分子排列通过交联分子间相互作用形成阶梯型堆积。图形摘要[图形摘要:5-Hydroxy-1,7-双-(4-羟基-3-甲氧基-苯基)-庚-1,6-dien-3-one的晶体结构分析在正交空间群Pca2 1中结晶。 ,在不对称单元中有两个分子,它是姜黄素的新多晶型物。晶胞参数为:a = 35.5368(8),b = 7.7799(2),c = 12.6796(3),D calc = 1.396Mgm·3,V = 3505.6(2)? 3,Z =8。通过O-H··O和C-H···O型氢键相互作用稳定分子堆积。]

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