2-hydroxy-1-naphthaldehyde-derived Schiff bases: synthesis, characterization, and structure
作者： Pallem Venkateswara Rao , Chebrolu Pulla Rao , Elina K Wegelius , Kari Rissanen
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摘要: Four Schiff base molecules were synthesized from the condensation of 2-hydroxy-1-naphthaldehyde with various amines having additional ligating centers, and resulting products characterized by analytical spectral methods, also single crystal X-ray diffraction. 2-(β-Naphthalideneamino)-2-methyl-1-propanol, 1, is orthorhombic, P212121, a = 9.918(1), b 12.629(1), c 10.416(1) A. 2-(β-Naphthalideneamino)-2-hydroxymethyl-1-propanol, 2, monoclinic, P21/c, 14.522(3), 9.723(2), 9.534(9) A, β 107.75(4)°. 2-(β-Naphthalideneamino)-2-hydroxymethyl-1,3-propanediol, 3, 20.981(9), 5.943(3), 10.549(5) 91.23(3)°. 2-(β-Naphthalideneamino)-pyridine, 4, 5.804(4), 17.363(2), 24.032(11) 92.03(5)°. The molecular structures these found to be in extended conformation where aromatic moiety coplanar that imine bond exhibited trans-geometry. naphthyl each stabilized quinoid form solid state. Interesting lattice noticed owing intermolecular interactions.
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