Table 2. Selected dihedral and torsion angles (°).
Dihedral 1 is the dihedral angle between the planes of the central benzene rings. Dihedral 2 is the dihedral angle between the planes of the central and terminal benzene rings.
| Compound | R1 | Dihedral 1 | Dihedral 2 | C6—C7—N1—C8 |
|---|---|---|---|---|
| (I) | 4-methoxy-2-nitrophenol | 66.0 (2) | 4.9 (2), 4.9 (2) | −177.7 (4), −177.7 (4) |
| DICKUW (Chu & Huang, 2007 ▸) | 2,4-di-tert-butylphenol | 73.8 | 4.8, 35.5 | 178.2, 177.2 |
| DICLAD (Chu & Huang, 2007 ▸) | 2-(tert-butyl)-4-methylphenol | 73.8 | 47.9, 46.3 | 175.2, −179.9 |
| GIFCEG (Arafath et al., 2018 ▸) | 2-methylphenol | 59.5 | 36.0, 31.5 | 178.3, 179.0 |
| HUDJEW (Lee & Lee, 2009 ▸) | 4-nitrophenyl | 75.7 | 53.0, 18.0 | −174.0, 179.2 |
| NATWEM (Khalaji et al., 2012 ▸) | 2,3,4-trimethoxyphenyl | 84.8 | 57.6, 73.1 | −179.2, −175.7 |
| PEHGOA (Kadu et al., 2013 ▸) | phenyl | 59.8 | 8.8, 6.0 | −179.9, 179.8 |
| PEHHAN (Kadu et al., 2013 ▸) | 4-methoxyphenyl | 60.1 | 5.3, 5.3 | −179.3, −179.3 |
| RIZFEM (Xu et al., 2008 ▸) | 2-methoxyphenol | 69.2 | 24.3, 24.3 | −180.0, −180.0 |
| TOWSOP (Kaabi et al., 2015 ▸) | 3-(diethylamino)phenol | 65.7 | 41.4, 30.6 | −173.1, −176.5 |
| UNUFEP (Shahverdizadeh & Tiekink, 2011 ▸) | phenol | 54.6 | 51.6, 51.6 | 173.5, 173.4 |
| WEFLUQ (Krishna et al., 2012 ▸) | naphthalen-2-ol | 75.1/70.1 | 7.7, 9.9/6.1, 19.4 | 176.5, 177.6/-179.3, −172.9 |
| WIGPOT (Haffar et al., 2013 ▸) | naphthalen-2-ol | 74.6/69.9 | 7.7. 9.9/19.6, 5.8 | 177.2, 176.3/ −172.9, −178.6 |
Note: there is more than one data set for compounds WEFLUQ and WIGPOT because there is more than one independent molecule in their asymmetric units.