The cyclopropane ring fission reaction of dicyclopropyl ketone and the Norrish type II reaction of cyclopropyl 2,2-dimethyl cyclopropyl ketone have been studied using the AM1 semiempirical molecular orbital method. Both reactions proceed from the first excited singlet 1(n→ π∗) states and the p...
Infrared spectra have been obtained for cyclopropane-d1, C3H5D(CP-d1), in the vapor phase and for dicyclopropyl ketone (C3H5)2 CO (DCPK) in the liquid state. Raman spectra of the latter compound in the liquid and solid phases have also been recorded. By comparing the experimental with the theore...
The molecular structure and conformations of the two structurally related molecules 1,1-dicyclopropylethene and dicyclopropyl ketone have been studied experimentally by the gas electron diffraction method. For the former molecule a conformational mixture of 59(8)% gg (as 47% g+g+, and 11% g+g−) ...
A series of oximinopropanolamines derived from dicyclopropyl ketone, in which the amine substituents were alkyl, cycloalkyl, aryl and aralkyl groups, has been synthesized. The β-adrenergic blocking properties were determined on anaesthetized rats. Two N-aralkyl derivatives were found to be as p...
Raman spectra of 1,1-dicyclopropyl-2,2-dimethylethene (c-C3H5)2C = C(CH3)2) as a liquid were obtained at 293 K and polarization data recorded. Additional Raman spectra were observed at various temperatures between 293 and 143 K, and intensity changes of certain bands with temperature detected. W...
The reaction of the lithium-cotaining derivative of dicyclopropyl ketone with chloro(tripehnylphosphine)gold has been shown to produce two organogold derivatives of the cyclopropane series. The lithium-containing derivative of dicyclopropyl ketone was obtained by treating dicyclopropyl ketone wi...
The i.r. and Raman spectra of liquid dicyclopropyl ketone have been reinvestigated from 4000 to 200 cm−1 with higher resolution than previously obtained. In addition, the i.r. spectrum of the polycrystalline solid was recorded from 4000 to 400 cm−1. Contrary to published results, evidence has be...
Geometric parameters, harmonic and anharmonic vibrational frequencies, conformer energy differences and barriers to internal rotation were obtained for dicyclopropyl ketone (DCPK) in the ground electronic state through MP2, DFT, CCSD and CCSD(T) calculations. VFPA was used to improve the estimat...
A series of ruthenium(II) mixed-ligand complexes containing 2(1H)-pyridinethione (C5H5NS) or 1-hydroxypyridine-2-thione (C5H5NOS) and bis(diphenylphosphino) alkanes, Ph2P(CH2)mPPh2 (m = 1–4), and a tritertiaryphosphine, (Ph2PCH2CH2)2PPh (triphos), of stoichiometry: RuA2L (HA = C5H5NS or C5H5NOS...
Mössbauer and IR spectra and electric dipole moments have been obtained for a series of dihalo and diorgano tin(IV) complexes with 2-pyridinethiol. Quadrupole splittings and isomer shifts indicate a trans arrangement of the CSnC bonds in all of the diorgano compounds in contrast to a trans a...
An effective and convenient synthesis of 2-pyridinethiol esters of carboxylic esters has been developed which involves the interaction of a carboxylate salt with the S-chloroformyl derivative of 2-pyridinethiol.
A single dose of zinc pyridine-2-thiol-1-oxide (ZPT; 5 mg/kg; oil-in-water emulsion), sodium pyridine-2-thiol-1-oxide (SPT; 50 mg/kg; aqueous solution), or the magnesium sulfate adduct of 2,2′-dithio-bis-pyridine-1-oxide (MDS; 4 mg/kg; aqueous solution), which included 5 μCi/kg of 2,6-14C-labe...
Sodium pyrithione and zinc pyrithione, labelled with 35S, were administered to rats, rabbits and monkeys, either orally or ip. Rats with cannulated bile or thoracic ducts were used in some experiments. Excreta and carcasses were analysed for radioactivity to determine the metabolic fate of the p...
Safety evaluation data have been presented for a shampoo formulation containing zinc 2-pyridinethiol 1-oxide at 2% and 10% levels. In addition toxicity studies have been carried out in dogs with a wo emulsion of ZnPT.The dog seems to be the species most susceptible to the effects of the compound...
Reduction of CO2 has recently attracted considerable attention because of its role in climate change and energy cycle. Here, 2-pyridinethiol (Py) is introduced as a new effective electrocatalyst for the reduction of CO2 to methanol on a Pt-Au self-assembled monolayer (SAMs) electrode (Pt-Au-S-Py...
Zinc pyrithione is an active component incorporated in an extensive range of topically applied commercial products that are used worldwide. Despite its prevalence, no published study has investigated the penetration of zinc from the zinc pyrithione complex into human skin. Zinc is crucial for he...
Anti–bacterial and anti–corrosion properties of sodium pyrithione (SPT) were studied using experimental methods and quantum chemical calculations. SPT at 80 mg/L reduced planktonic and sessile sulfate reducing bacteria (SRB) on X80 carbon steel to undetectable levels. The corrosion inhibition ...
This study was conducted to investigate the median lethal concentration (LC50) of copper pyrithione (CuPT) at 96-hr exposure on adult Javanese medaka (Oryzias javanicus) in revealing toxicological effects of CuPT contamination in the tropical area. Wild stock fishes were acclimatized for 14-days...
Zinc pyrithione (ZPT) is widely used as a substitute booster biocide for tributyltin and is also an additive to antidandruff shampoos and medical cosmetic products. ZPT and pyrithione have been detected in different environmental matrices and biota, suggesting that it may pose health threats to ...
Zinc pyrithione (ZnPT) is an organometallic biocide with bactericide, algaecide, and fungicide activity. Considering this biological activity, ZnPT has been used in anti-fouling paints, and also in human therapeutics and cosmetics, in shampoos to treat dandruff and seborrhoea. Despite its potent...
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