Redetermination of Crystal Structure of N,N'-bis (۲-Hydroxybenzylidene)-۲,۲-Dimethyl-۱,۳-Propanediamine

The structure of N,N'-bis(۲-hydroxybenzylidene)-۲,۲-dimethyl-۱,۳-propanediamine, C۱۹H۲۲N۲O۲, has been studied at low temperature (۱۲۰K) by means of single-crystal X-ray diffraction. Solving the structure shows an orthorhombic unit cell, with P۲۱۲۱۲۱ space group, Z = ۴, a = ۶.۱۰۴۶ (۴) Å, b = ۱۵.۸۳۴۹ (۱۱)Å, c = ۱۷.۲۸۹۸ (۱۲) Å and V = ۱۶۷۱.۳ (۲) Å۳. There are two relatively strong hydrogen bonds (average O—H···N, ۲.۵۹ Å), involving the hydroxyl group and the nearest N atom of the imine groups is an indicative of intra-molecular hydrogen bonding within each salicylideneimine moiety.  C-H…π interactions connect the neighboring molecules together, stabilizing the crystal network. No significant p-p interactions are present in the crystal structure.

کلیدواژه ها:

Schiff Base ، Crystal structure ، Single crystal X-ray diffraction ، Hydrogen bonding ، C-H…π interaction