N-Benzoyloxy-N-methyl-4-aminoazobenzene, a synthetic model ultimate carcinogenic derivative of N-methyl- and N,N-dimethyl-4-aminoazobenzene, reacted with [8-14C]deoxyguanosine in vitro to yield ten 14C-containing products separable by high-performance liquid chromatography. N-(Deoxyguanosin-8-yl)-N-methyl-4-aminoazobenzene, previously characterized as the major adduct formed in this reaction, o...

Low field methyl tunnelling spectra of dimethyl sulphide have been measured using field cycling NMR and indicate the existence of two distinct methyl groups with tunnel. frequencies of 100kHz and 750kHz. Spectra show a significant broadening of the Larmor peak at those fields at which the Larmor and tunnel frequencies are equal. These are resonances between the rotational and spin dynamics of t...

The new mixed complex {[2Ni(L1)2.2Ni(L1)(L2)].2(NO3)4•2H2O} was obtained from a mixture, under aerobic conditions, of solution Ni(NO3)2,6H2O and the two diamine pyrazolic ligands L1, N1-((3,5-dimethyl-1H-pyrazol-1-yl)methyl)propane-1,2-diamine, L2, N2-((3,5-dimethyl-1H-pyrazol-1-yl)-methyl)propane-1,2-diamine. Obtained in very good yield, this identified characterized by FT-IR, EDX, ultraviolet...

An efficient and general method for the synthesis of reduced polypropionates has been developed through the application of asymmetric carboalumination of alkenes catalyzed by dichlorobis(1-neomenthylindenyl)zirconium [(NMI)(2)ZrCl(2)]. In this investigation, attention has been focused on those reduced polypropionates that are alpha-monoheterofunctional and either omega-ethyl or omega-n-propyl. ...

It is demonstrated here that tridentate imine ligands can control the nuclearity of copper(II) complexes based on the donor atoms present in the ligand. The N,N',N''-donating imine ligand led to a mononuclear compound, namely di-chlorido-[N,N-dimethyl-N'-(pyridin-2-yl-methyl-idene)ethane-1,2-di-amine]copper(II) monohydrate, [CuCl2(C10H15N3)]·H2O, 1, while the N,N',O-donating imine ligand produc...

Phosphotriesterase (PTE) from Pseudomonas diminuta catalyzes the detoxification of organophosphates such as the widely utilized insecticide paraoxon and the chemical warfare agent sarin. The three-dimensional structure of the enzyme is known from high resolution x-ray crystallographic analyses. Each subunit of the homodimer folds into a so-called TIM barrel, with eight strands of parallel beta-...

As a part of our continuing work to improve the flame retardance of some chain-growth polymers, by employing a reactive route, we have synthesized several unsaturated compounds containing either phosphorus (P), or both phosphorus (P) and nitrogen (N), bearing groups in different chemical environments. They included: diethyl(acryloyloxymethyl)phosphonate (DEAMP); diethyl(1-acryloyloxyethyl)phosp...