N,N'-Bis(5-bromo-2-hydroxy-benzyl-idene)-2,2-dimethylpropane-1,3-diamine.
N,N'-Bis(5-bromo-2-hydroxy-benzyl-idene)-2,2-dimethylpropane-1,3-diamine.
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DOI：
10.1107/s160053680802816x
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发表时间：
2008-09-06
期刊：
影响因子：
--
通讯作者：
Kargar H
中科院分区：
文献类型：
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作者：
Fun HK;Kia R;Kargar H
标题席夫碱化合物C19 H20 Br 2N 2 O2的晶体结构在不对称单元中含有两个晶体学上独立的分子（A和B），具有相似的构象。分子内O-H N（× 4）和C-H N（× 5）氢键形成六元环和五元环，分别产生S（6）和S（5）环基序。分子A中的一个N原子作为三叉受体，其余的N原子是分叉受体。分子A和B中苯环间的二面角分别为47.83（17）°和61.11（17）°。 分子构象由分子内O-H-CN和C-H-CN氢键稳定。苯环中心之间的距离[3.7799（19）-3.890（2）<$]表明存在π-π相互作用。 此外，晶体结构通过分子间C-H O氢键、C-H π相互作用以及分子间短的Br Br和Br O接触而进一步稳定[分别为3.4786（5）和3.149（3）]。
The crystal structure of the title Schiff base compound, C19H20Br2N2O2, contains two crystallographically independent molecules (A and B) in the asymmetric unit, with similar conformations. Intramolecular O—H⋯N (× 4) and C—H⋯N (× 5) hydrogen bonds form six- and five-membered rings, producing S(6) and S(5) ring motifs, respectively. One of the N atoms in molecule A acts as a trifurcated acceptor, the rest of the N atoms being bifurcated acceptors. The dihedral angles between the benzene rings in molecules A and B are 47.83 (17) and 61.11 (17)°, respectively. The molecular conformation is stabilized by intramolecular O—H⋯N and C—H⋯N hydrogen bonds. The short distances between the centroids of the benzene rings [3.7799 (19)–3.890 (2) Å] indicate the existence of π–π interactions. In addition, the crystal structure is further stabilized by an intermolecular C—H⋯O hydrogen bond, C—H⋯π interactions, and short intermolecular Br⋯Br and Br⋯O contacts [3.4786 (5) and 3.149 (3) Å, respectively].