Crystal structure of 4,5-diisopropylimidazole,(C3H7)2C3N2H2

Synthesis and X-ray crystallographic characterization of substituted aryl imines

“…The molecular structure of 1 shows a torsion angle formed by N1-C1-C1A-N1A of 180.0° (Fig. 5) which is consistent with the trans geometry of other a-diimines derived from 2,3-butanedione (177.5-180.0°) [33][34][35][36][37][38][39][40][41][42][43][44][45]. The substituted phenyl groups of 2-6 show an orthogonal conformation with respect to the naphthalene moiety which has also been observed with similar a-diimines [11,[46][47][48] and an a-iminoketone [49] derived from acenaphthenequinone (Fig.…”

1-Benzyl-4,5-diphenyl-3-vinylimidazolium bromide

“…Qualitatively, bond distances in the imidazolium ring show the typical short (C2ÐN1 and C2ÐN3), long (N1ÐC5 and N3ÐC4), and short (C4ÐC5) variation (Elaiwi et al, 1995). Quantitatively, they agree, within experimental error, with the averages of those reported for three other tetra-substituted imidazolium species, (II), (III) and (IV) (Kuhn et al, 1996(Kuhn et al, , 1999(Kuhn et al, , 2001).…”

(Z)-N-[(Z)-3-(2,5-Dimethylphenylimino)butan-2-ylidene]-2,5-dimethylaniline

“…For the crystal structures of related compounds, see: Kuhn et al (2001); Schaub & Radius (2006); Yuan et al (2012). Data collection: APEX2 (Bruker, 2008); cell refinement: SAINT (Bruker, 2008); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.…”