Molecular planarity and crystal structures of N-Salicylideneaminopyrazine derivatives

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Abstract

The crystal structures of N-salicylideneaminopyrazine (SAPz) derivatives, 2SAP Z (1) and 3,5-Br-2SAP Z (2), were determined by single-crystal X-ray structural analysis. They were revealed: (1) monoclinic, P2 1 /n, a = 4.541(4), b = 19.523(18), c = 10.844(9)Å, β = 97.80(3)°, Z = 4, V = 952.5(15)Å3, R 1 = 0.0651 [I > 2σ(I)]; (2) orthorhombic, P2 1 2 1 2 1 , a = 3.9508(4), b = 10.8449(11), c = 27.627(3)Å, Z = 4, V = 1183.7(2)Å 3 , R 1 = 0.0494 [I > 2σ(I)]. These molecular conformations are planar because of the lack of intramolecular steric repulsion with the pyrazine ring. The dihedral angles between phenol ring and pyrazine ring were 5.26(11) and 10.0(4)°, respectively.

Original languageEnglish
Pages (from-to)57-58
Number of pages2
JournalX-ray Structure Analysis Online
Volume34
Issue number12
Publication statusPublished - 2018 Jan 1

ASJC Scopus subject areas

  • Analytical Chemistry
  • Materials Chemistry

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