Application In Synthesis of 1,5-Dibromopentane. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about Influence of dicationic quaternary ammonium gemini surfactant system on metal-amino acid complex-ninhydrin reaction. Author is Kumar, Dileep; Rub, Malik Abdul.
In the current study, we have elucidated the influence of dicationic quaternary ammonium geminis system on metal-amino acid [Ni(II)-his]+ complex-ninhydrin reaction with the help of UV-vis spectrophometer at 343 K and pH 5.0. Under varying exptl. conditions, rate constant values, kψ, were determined using a computer-based program. Quaternary ammonium gemini systems (rate constant values of 16-6-16, 16-5-16 and 16-4-16 at 30 x 10-5 mol dm-3 are 5.5 x 10-5 s-1, 6.5 x 10-5 s-1 and 7.5 x 10-5 s-1, resp.) are detected more superior compared to aqueous system (rate constant in aqueous is 1.7 x 10-5 s-1). Study was catalyzed and accelerated by gemini surfactants (even though at concentrations below than their cmc values) compared to aqueous medium. Rate constant increases progressively on increasing [gemini] (region I, where [gemini] is smaller than their cmc) and leveling-off regions attain (region II, at [gemini] up to 400 x 10-5 mol dm-3). Afterward, gemini provides a region III of increasing kψ at higher concentration (region III, beyond 400 x 10-5 mol dm-3). Exptl. results acquired in dicationic quaternary ammonium gemini surfactant system are deduced quant. by kinetic pseudo-phase model. For determination of cmc of geminis having a different methylene spacer chain length (s = 4, 5, 6), the specific conductance at varied [16-6-16], [16-5-16] and [16-4-16] (i.e., water and water + ninhydrin + [Ni(II)-his]+) were 0.043 x 10-3 mol dm-3 at 303 K and 0.053 x 10-3 mol dm-3 at 343 K; 0.034 x 10-3 mol dm-3 at 303 K and 0.044 x 10-3 mol dm-3 at 343 K; 0.032 x 10-3 mol dm-3 at 303 K; 0.040 x 10-3 mol dm-3 at 343 K, resp., recorded on a conductivity meter. Several activation parameters for 16-6-16, 16-5-16 and 16-4-16 (ΔH# = 45.0, 43.5 and 42.0 kJ mol-1; ΔS# 87.0, 87.6 and 88.3 JK-1; Ea = 47.8, 46.3 and 44.8 kJ mol-1) and binding parameters for 16-6-16, 16-5-16 and 16-4-16 (KX = 63.0, 58.0 and 54.0 mol-1 dm3; KY = 70.0, 66.0 and 62.0 mol-1 dm3) are also determined
As far as I know, this compound(111-24-0)Application In Synthesis of 1,5-Dibromopentane can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.
Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis