Crystal structure and DFT studies of N1,N6-Di(9H-fluoren-9-ylidene)hexane-1,6-diamine

Yuan, Meirong; Li, Zhuomin

doi:10.1016/j.molstruc.2012.10.014

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“…For their applications, see: Ourari et al (2006Ourari et al ( , 2008; Ouari et al (2010Ouari et al ( , 2015. For related crystal structures, see: Yuan & Li (2013); Paul & Kubicki (2009). For the biological activity of Schiff bases, see: Zayed et al (2015); Abou-Hussein & Linert (2014); Sadeek et al (2013…”

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confidence: 99%

1,1′-{(Hexane-1,6-diyl)bis[(azaniumylylidene)methanylylidene]}bis(naphthalen-2-olate)

et al. 2015

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The whole molecule of the title Schiff base compound, C28H28N2O2, is generated by inversion symmetry. It is formed from two units of ortho-hydroxynaphthaldehyde bridged with 1,6-diaminohexane. The N atoms are protonated and, thus, the structure is a bis-zwitterionic compound in the solid state. The zwitterion shows strong intramolecular N—H⋯O hydrogen bonds between the iminium N and the naphthalenolate O atoms.

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