1-[(Bromomethyl)(phenyl)methylene]-2-(2,4-dinitrophenyl)hydrazine

Abstract

The title compound, C14H11BrN4O4, comprises two crystallographically independent mol­ecules (A and B) in the asymmetric unit. In mol­ecule B, intra­molecular bifurcated N—H⋯O and N—H⋯Br hydrogen bonds and in mol­ecule A, an intra­molecular N—H⋯O hydrogen bond generate S(6) ring motifs. The dihedral angle between the phenyl and benzene rings is 5.44 (6) in mol­ecule A and 7.63 (6)° in mol­ecule B. The ortho- and meta-nitro substituents make dihedral angles of 6.67 (15) and 2.26 (15)° to the attached benzene ring in mol­ecule A and 6.37 (17) and 5.81 (16)° in mol­ecule B. The Br atom in mol­ecule B is disordered over two positions with a refined site-occupancy ratio of 0.61 (3):0.39 (3). Inter­esting features of the crystal structure are the short Br⋯N [3.257 (3)–3.294 (4) Å], Br⋯O [3.279 (3)–3.307 (4) Å] and O⋯O [2.9319 (16)–2.9995 (16) Å] contacts, which are shorter than the sum of the van der Waals radii of these atoms. The crystal structure is further stabilized by inter­molecular C—H⋯O and π–π inter­actions [centroid–centroid distances = 3.6643 (8)–3.8514 (8) Å].

(E)-4-Hydroxy-N′-(4-hydroxy-3-methoxybenzylidene)benzohydrazide

“…For the pharmacological activity of Schiff bases derivatives, see: Zia-ur-Rehman et al (2009); Parashar et al (1988); Hadjoudis et al (1987). For the biological activity of hydrazide derivatives, see: Waisser et al (1990); Hall et al (1993); Salhin et al (2007Salhin et al ( , 2009; Tameem et al (2006Tameem et al ( , 2007Tameem et al ( , 2008. For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986).…”

“…Many hydrazide derivatives known to have significant biological activities such as monoamine oxidase inhibitory activity, antifungal and tuberculostatic activity (Waisser et al, 1990;Hall et al, 1993). Continuing our interest on the synthesis and application of hydrazone and hydrazide derivatives (Salhin et al, 2007(Salhin et al, , 2009Tameem et al, 2006Tameem et al, , 2007Tameem et al, , 2008, compound (I) ( Table 1).…”

Synthesis, Characterization and Crystal Structure of Samarium(III)-(E)-1-phenyl-N-(4H-1,2,4-triazol-4-yl)methanimine Complex

“…The C(3)═N(4) bond length in the triazole ring is 1.284(3) Å, while the C( 12)═N (8) bond length in the triazole ring is 1.276(3) Å. These bond distances are longer than a typical carbon-nitrogen double bond (C═N) [1.269 (2) Å] [58] . On the other hand, these bond lengths are shorter than that for carbon-nitrogen single bond (CN) [1.443(4) Å] [59] , demonstrat-ing the possibility of electron delocalization.…”

Bach Adsorption Study for the Extraction of Silver Ions by Hydrazone Compounds from Aqueous Solution

“…One hundred milliliters stock solution (2 ppm) for each metal ions (Ag + , Cu 2+ , Co 2+ , Zn 2+ , Pb 2+ , Fe 3+ , Ni 2+ , and Mn 2+ ) were prepared from stock solution of metal ions (1000 ppm, Merck) in distilled water. Hydrazone compound, 1-[(bromomethyl)(phenyl)methyl]-2-(2,4-dinitrophenyl) hydrazine (BPMDNPH), was prepared using reported route [ 35 ]. Tetraethoxysilane (TEOS) (Fluka) was used as sol-gel precursor, and 3-aminopropyltriethoxysilane (Fluka) for silica modification, hydrochloric acid (R&M Chemicals), nitric acid (Systerm), ammonia (R&M Chemicals), ethanol (EtOH) (QRëC) and tetrahydrofuran (THF) (Fluka) were used as received.…”