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- W2000218118 abstract "The X-ray structure of 2-amino-4-nitropyridine was determined at room temperature. The crystal belongs to the P21/c space group of the monoclinic system (Z=4, a=6.7290(10), b=10.946(2), c=9.060(2) Å, β=100.03(3) deg) and is built of layers parallel to the (102) crystallographic plane. The molecules in the layer are joined into centrosymmetric dimers by two N–H⋯N hydrogen bonds (N⋯N distance=3.011(3) Å), which form rings of Ci symmetry. The other N–H bonds of the amino groups are involved in N–H⋯O hydrogen bonds with the oxygen atoms of the nitro groups (N⋯O distance=3.054(3) Å). These hydrogen bonds join the dimers into an infinite plane. The powder IR and Raman spectra (4000–80 cm−1) were measured for normal and deuterated crystals and are discussed with respect to the crystal structure. The N–H stretching vibrations behave as the stretching vibrations of two almost independent hydrogen bonds. Strong Ag–Au-type splitting is observed for the stretching vibrations of the N–H⋯N type hydrogen bonds." @default.
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- W2000218118 date "1997-08-01" @default.
- W2000218118 modified "2023-09-29" @default.
- W2000218118 title "Structural and vibrational investigation of 2-amino-4-nitropyridine crystal" @default.
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- W2000218118 doi "https://doi.org/10.1016/s0022-2860(97)00009-4" @default.
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