Structures and librational motions ofp-dichlorobenzene in Werner clathrates

4-Acetylpyridine–fumaric acid (2/1)

“…The acetylpyridine molecule is not protonated in the crystal structure, which contrasts with that found in the crystal structure of the 4-acetylpyridinium chloride (Kochel, 2005). The geometry data of the acetylpyridine is consistent with those found in metal complexes of acetylpyridine (Steffen & Palenik, 1977;Pang et al, 1994). The planar acetylpyridine molecule is twisted to the fumaric acid with a dihedral angle of 25.97 (11)° in the crystal structure.…”

“…For literature on C-O bond distances in fumaric acid, see: Liu et al (2003). For metal complexes of 4-acetylpyridine, see: Steffen & Palenik (1977); Pang et al (1994). For a 4-acetylpyridinium salt, see: Kochel (2005).…”

4-Acetylpyridinium iodide

“…For background to phase transition materials, see: Li et al (2008); Zhang et al (2009). For 4-acetylpyridine as a ligand in coordination compounds, see: Steffen & Palenik (1977); Pang et al (1994). For other structures involving 4-acetylpyridine, see: Fu (2009a,b); Majerz et al (1991).…”

4-Acetylpyridinium hydrogen sulfate

“…For the crystal structure of an adduct of 4-acetylpyridine with pentachlorophenol, see: Majerz et al (1991). For the crystal structures of Zn and Ni complexes of 4-acetylpyridine, see: Pang et al (1994); Steffen et al (1977). Orthorhombic, P2 1 2 1 2 1 a = 4.6454 (9) Å b = 9.597 (2) Å c = 21.310 (4) Å V = 950.1 (3) Å 3 Z = 4 Mo K radiation = 0.34 mm À1 T = 298 K 0.20 Â 0.20 Â 0.20 mm…”

“…Comment 4-Acetylpyridine may be used as a ligand in coordination compounds e.g. with Zn (Steffen & Palenik, 1977) or Ni (Pang et al, 1994). The crystal structure of 4-acetylpyridine together with pentachlorophenol is also known (Majerz et al, 1991).…”