Cis-polybutadiene was functionalized using in–situ generated DMD as oxidant and tetra-n-butyl ammonium bromide as phase transfer catalyst (PTC). The epoxidation process was investigated by 1HNMR spectroscopy. 1HNMR spectrum analysis of products confirms the absence of ring opening side products in epoxidation reaction. Various factors such as reaction temperature, reaction time and the concentr...

1,4 Dihydropyridines are very versatile compounds and have important role as therapeutic agents. The 1, 4 (1,4 DHPs) well known calcium channel blocker their use in treatment of cardiovascular diseases is common. These also to antimicrobial activities. N-heterocyclic represent framework for agricultural pharmaceutical industries. antibacterial antifungal Hence, the substituted 4- Dihydropyridin...

The redetermined, low temperature (150 K), structure of tetra-n-butyl-ammonium bromide, (C(4)H(9))(4)N(+)·Br(-), has been found to be merohedrally twinned via twin law -1 0 0, 0 - 1 0, 1 0 1. The structure was previously determined, with low precision, no inclusion of H atoms and only the bromide ion refined with anisotropic displacement parameters, by Wang et al. (1995 ▶). Mol. Cryst. Liq. Cry...

Stable chromium, molybdenum and tungsten nanoparticles are obtained reproducibly by thermal or photolytic decomposition under argon from mononuclear metal carbonyl precursors M(CO)(6) (M=Cr, Mo, W) suspended in the ionic liquids BMim(+)BF(4)(-), BMim(+)OTf(-) and BtMA(+)Tf(2)N(-) (BMim(+)=n-butyl-methyl-imidazolium, BtMA(+)=n-butyl-trimethyl-ammonium, Tf(2)N=N(O(2)SCF(3))(2), OTf=O(3)SCF(3)) wi...

C-Phenyl N-tert-Butyl [15N]nitrone, Nitrone, Spin Trap, EPR Spin Trapping, Aminoxyl (Nitroxide) As compared to normal PBN, about fifty percent increase of electron paramagnetic reso­ nance (EPR) spin trapping sensitivity has been gained by using a new 100% 1:>N-enriched spin trap, C-phenyl /V-rm-butyl[15N]nitrone (PBN-15N). PBN-15N has been prepared by a convenient four-step route using ammoniu...

The chromatographic methods used for the purification of PEGylated proteins are mainly Size Exclusion (SEC) and Ion Exchange Chromatography (IEX). Although the PEGylation affects the protein hydrophobicity, Hydrophobic Interaction Chromatography (HIC) has not been extensively applied for the separation of these proteins. Purification of monoPEGylated Ribonuclease A (RNase A) using HIC is studie...

The title compound, (C(16)H(36)N)(2)[Cd(C(5)O(3)S(2))(2)]·0.25H(2)O, contains two disordered tetra-butyl-ammonium cations, a complex [Cd(C(5)O(3)S(2))(2)](2-) anion and a 0.25-hydrate water. The anion is composed of a bidentate coordinated 3,4,5-trioxocyclo-pent-1-ene-1,2-dithiol-ate (dtcroc) group forming a distorted tetra-hedral configuration around the Cd(II) ion. The dihedral angle between ...