The 1:1 adduct of 1,3,5-trinitrobenzene with 1,2,3,4-tetrahydroquinoline

7-Nitro-1,2,3,4-tetrahydroquinoline

“…Comment 7-Nitro-1,2,3,4-tetrahydroquinoline, (I), is a versatile intermediate in the preparation of 7-hydroxy-1,2,3,4-tetrahydroquinoline, which is widely used in the efficient synthesis of laser dyes of the rhodamine class (Field et al, 1994). Bond lengths and angles in the title compound agree with those reported for related structures (Jasinski & Woudenberg, 1993;Sivaraman et al, 1996;Smith et al, 2002;Sankaranarayanan et al, 2003). The tetrahydropyridine ring adopts an envelope conformation, with atom C8 deviating by 0.659 (2) Å from the mean plane through the other five atoms (Fig.…”

“…Data collection: PROCESS-AUTO (Rigaku, 1998); cell refinement: PROCESS-AUTO; data reduction: CrystalStructure (Rigaku/ MSC, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: CRYSTALS (Betteridge et al, 2003); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: quinoline, which is widely used in the efficient synthesis of laser dyes of the rhodamine class (Field et al, 1994). Bond lengths and angles in the title compound agree with those reported for related structures (Jasinski & Woudenberg, 1993;Sivaraman et al, 1996;Smith et al, 2002;Sankaranarayanan et al, 2003). The tetrahydropyridine ring adopts an envelope conformation, with atom C8 deviating by 0.659 (2) Å from the mean plane through the other five atoms (Fig.…”

Self-Assembly of Hydrogensquarates: Crystal Structures and Properties

“…The observed value is within the range of the other salts of 1,2,3,4-tetrahydroquinoline. In the hydrogen chloranilate salt (PAGXOL), the value is −61.6(9)°, whereas in the 1,3,5-trinitrobenzene salt, the cation exhibits a disorder ZZZAGJ01, and in the 3,5-dinitrosalicylate salt GIFNAL the value is 62.0(2)°. The squarate dianion exhibits molecular D 4 h symmetry and lies on a crystallographic center of inversion.…”

Guanidinium 2-amino-4-nitrobenzoate monohydrate at 130 K

“…We have used 2-amino-4-nitrobenzoic acid (4-nitroanthranilic acid, NAA) for cocrystal formation with Lewis bases, but its efficacy in such processes is poor. Crystallographically characterized examples are the proton-transfer compounds with ethylenediamine (a 1:2 dihydrate) (Smith et al, 2002) and dicyclohexylamine (a 1:1 anhydrate) (Smith et al, 2004). Crystals of the title compound, guanidinium 4nitroanthranilate monohydrate, (I), were obtained from the 1:1 stoichiometric reaction of NAA with guanidine carbonate and the crystal structure is reported here.…”