Thermal analysis of quinolinium tetrachloroferrate(III)

Wyrzykowski, Dariusz; Pattek‐Janczyk, A.; Maniecki, Tomasz P.; Zaremba, K.; Warnke, Zygmunt

doi:10.1016/j.tca.2005.12.023

Cited by 40 publications

(48 citation statements)

References 15 publications

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“…A reducing factor can be Cl -ligands, which reduce cobalt(III) in the process of an intramolecular electron transfer. Reducing properties of halogen ligands were observed in reactions of the intramolecular reduction of iron(III) ions present in the tetrachloridoferrate(III) complexes [24][25][26][27]. There is also a possibility of an intermolecular mechanism of the reduction of Co(III), in which chloride ions present outside the inner coordination sphere of the metal ion participate.…”

Section: Thermal Analysismentioning

confidence: 99%

Thermal properties of [Co(en)2Cl2]Cl in solid state. Cis–trans isomerization of the [Co(en)2Cl2]+ complex ion in methanol

Jacewicz

Pranczk

Wyrzykowski

et al. 2014

Reac Kinet Mech Cat

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]Cl complex isomers have been studied using the TG-FTIR and TG-DSC-MS techniques. The measurements were carried out in argon atmosphere over the temperature range 293-873 K. The influence of the configurational geometry on the pathways of thermal transformations was discussed. Furthermore, kinetic studies on the reaction of the cis-trans isomerization of the [Co(en) 2 Cl 2 ]Cl complex salt in methanolic solutions were performed using UV-Vis spectrophotometry at five temperatures in the 293-313 K temperature range. The observed rate constants were computed using the ''Glint'' program based on the global analysis. It has been found that the cis-trans isomerization of [Co(en) 2 Cl 2 ]Cl is a first order reaction. Furthermore, the cis/trans [Co(en) 2 Cl 2 ]Cl isomerization proceeds according to the dissociative mechanism.

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Section: Thermal Analysismentioning

confidence: 99%

Thermal properties of [Co(en)2Cl2]Cl in solid state. Cis–trans isomerization of the [Co(en)2Cl2]+ complex ion in methanol

Jacewicz

Pranczk

Wyrzykowski

et al. 2014

Reac Kinet Mech Cat

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“…Alcock et al 1997). One of these projects is the Optical Gravitational Lensing Experiment (OGLE) study of the Small Magellanic Cloud (SMC) (Udalski et al 1998) and the Large Magellanic Cloud (LMC) (Udalski et al 2000), which has already yielded (Wyrzykowski et al 2003) a few thousand light curves of eclipsing binaries. These two sets of light curves enable a statistical analysis of a large sample of short-period extragalactic binaries, for which the absolute magnitudes of all systems are known to a few per cent.…”

Section: Introductionmentioning

confidence: 99%

Automated analysis of eclipsing binary light curves – II. Statistical analysis of OGLE LMC eclipsing binaries

Mazeh

Tamuz

North

2006

Monthly Notices of the Royal Astronomical Society

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In the first paper of this series, we presented EBAS – Eclipsing Binary Automated Solver, a new fully automated algorithm to analyse the light curves of eclipsing binaries, based on the ebop code. Here, we apply the new algorithm to the whole sample of 2580 binaries found in the Optical Gravitational Lensing Experiment (OGLE) Large Magellanic Cloud (LMC) photometric survey and derive the orbital elements for 1931 systems. To obtain the statistical properties of the short‐period binaries of the LMC, we construct a well‐defined subsample of 938 eclipsing binaries with main‐sequence B‐type primaries. Correcting for observational selection effects, we derive the distributions of the fractional radii of the two components and their sum, the brightness ratios and the periods of the short‐period binaries. Somewhat surprisingly, the results are consistent with a flat distribution in log P between 2 and 10 d. We also estimate the total number of binaries in the LMC with the same characteristics, and not only the eclipsing binaries, to be about 5000. This figure leads us to suggest that (0.7 ± 0.4) per cent of the main‐sequence B‐type stars in the LMC are found in binaries with periods shorter than 10 d. This frequency is substantially smaller than the fraction of binaries found by small Galactic radial‐velocity surveys of B stars. On the other hand, the binary frequency found by Hubble Space Telescope (HST) photometric searches within the late main‐sequence stars of 47 Tuc is only slightly higher and still consistent with the frequency we deduced for the B stars in the LMC.

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“…The Optical Gravitational Lensing Experiment (OGLE) project, for example, yielded a huge photometric data set of the Small Magellanic Cloud (SMC) (Udalski et al 1998) and the Large Magellanic Cloud (LMC) (Udalski et al 2000), which includes a few thousand eclipsing binary light curves (Wyrzykowski et al 2003). This data set allows for the first time a statistical analysis of the population of short-period binaries in another galaxy.…”

Section: Introductionmentioning

confidence: 99%

“…A first effort in this direction was performed by North & Zahn (2003, hereafter NZ03), who derived the orbital elements and stellar parameters of 153 eclipsing binaries in the SMC in order to study the statistical dependence of the eccentricity of the binaries on their separation. In a following study, (North & Zahn 2004, hereafter NZ04) analysed another sample of 509 light curves selected from the 2580 eclipsing binaries discovered in the LMC by the OGLE team (Wyrzykowski et al 2003). However, the OGLE LMC data contain many more eclipsing binary light curves.…”

Section: Introductionmentioning

confidence: 99%

Automated analysis of eclipsing binary light curves - I. EBAS - a new Eclipsing Binary Automated Solver with EBOP

Tamuz

Mazeh

North

2006

Monthly Notices of the Royal Astronomical Society

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We present a new algorithm, Eclipsing Binary Automated Solver (EBAS), to analyse light curves of eclipsing binaries. The algorithm is designed to analyse large numbers of light curves, and is therefore based on the relatively fast ebop code. To facilitate the search for the best solution, EBAS uses two parameter transformations. Instead of the radii of the two stellar components, EBAS uses the sum of radii and their ratio, while the inclination is transformed into the impact parameter. To replace human visual assessment, we introduce a new ‘alarm’ goodness‐of‐fit statistic that takes into account correlation between neighbouring residuals. We perform extensive tests and simulations that show that our algorithm converges well, finds a good set of parameters and provides reasonable error estimation.

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Thermal analysis of quinolinium tetrachloroferrate(III)

Cited by 40 publications

References 15 publications

Thermal properties of [Co(en)2Cl2]Cl in solid state. Cis–trans isomerization of the [Co(en)2Cl2]+ complex ion in methanol

Thermal properties of [Co(en)2Cl2]Cl in solid state. Cis–trans isomerization of the [Co(en)2Cl2]+ complex ion in methanol

Automated analysis of eclipsing binary light curves – II. Statistical analysis of OGLE LMC eclipsing binaries

Automated analysis of eclipsing binary light curves - I. EBAS - a new Eclipsing Binary Automated Solver with EBOP

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