Darstellung und Eigenschaften von trans-Dihalogeno-tetrakis(pyridin)osmium(II)-Komplexen / Preparation and Properties of trans-Dihalo-tetrakis(pyridine)osmium(II) Complexes

1980 ◽  
Vol 35 (1) ◽  
pp. 71-73 ◽  
Author(s):  
J. Behrensdorf ◽  
W. Preetz
Keyword(s):  
Organic Solvents ◽  
Mass Spectra ◽  
Violet Colour

The reaction of fac-K2[OsX3l3] (X = Cl, Br) with pyridine and glycerin gives dark red crystals of trans-[OsClI(py)4] or trans-[OsBrI(py)4], soluble in organic solvents, and sublimable in vacuum at 300 or 320 °C. The structure is established by vibrational and mass spectra. With HX adducts of type trans-[OsXI(py)4]·2 HX are formed, soluble in water with violet colour.

Notizen: Darstellung und Eigenschaften von trans-Diiodo-tetrakis(pyridin)osmium(II)/Preparation and Properties of /trans-Diiodo-tetrakis(pyridine)osmium (II)

1979 ◽  
Vol 34 (9) ◽  
pp. 1341-1342 ◽  
Author(s):  
J. Behrensdorf ◽  
W. Hasenpusch ◽  
W. Preetz
Keyword(s):  
Organic Solvents ◽  
Mass Spectra ◽  
Blue Colour ◽  
Polar Solvents

AbstractK2[OsI6] reacts with pyridine and glycerin to give dark red crystals of trans-[OsI2(py)4], soluble in organic solvents, insoluble in water, and sublimable in vacuum at 360 °C. The structure is established by vibrational and mass spectra. From solutions in non-polar solvents with gaseous HX (X = Cl, Br) adducts of type trans-[OsI2(py)4] ·2 HX are precipitated, which are soluble in water with blue colour.

scholarly journals Binuclear alkynylplatinum(ii) terpyridine complexes with flexible bridges behave as organogelators for several organic solvents

RSC Advances ◽  
2017 ◽  
Vol 7 (24) ◽  
pp. 14389-14394 ◽  
Author(s):  
Ling-Bao Xing ◽  
Fei Qiao ◽  
Zhao Yuan ◽  
Jing-Li Zhang ◽  
Rui-Ying Zhang ◽  
...  
Keyword(s):  
Organic Solvents ◽  
Elemental Analysis ◽  
Mass Spectra ◽  
H Nmr

New binuclear alkynylplatinum(ii) terpyridyl complexes with flexible bridges have been synthesized and characterized by 1H NMR, mass spectra and elemental analysis.

scholarly journals Zum Photoabbau von l-(4-Chlorphenyl)-4,4-dimethyl-3-(1H-1,2,4-triazoll- ylmethyl)-pentan-3-ol (Folicur®) [1] / On the Photodegration of l-(4-Chlorophenyl)-4,4-dimethyl-3-(1H-1,2,4-triazol-l-ylmethyl)-pentan-3-ol (Folicur®) [1]

1994 ◽  
Vol 49 (2) ◽  
pp. 280-287 ◽  
Author(s):  
Heinrich Wamhoff ◽  
Helmut Koch ◽  
Rolf Förster ◽  
Christiane Herrmann ◽  
Sanaa M. S. Atta ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Titanium Dioxide ◽  
Singlet Oxygen ◽  
Organic Solvents ◽  
Mass Spectra ◽  
Methylene Chloride ◽  
Spectroscopic Methods ◽  
Triazole Fungicide ◽  
Significant Acceleration ◽  
Kinetics Of

The photodegradation of the 1,2,4-triazole fungicide Folicur 1 in different organic solvents (benzene, ether, methylene chloride, methanol) and water, in absence and in presence of a singlet oxygen sensitizer (methylene blue) has been studied. The photometabolites formed in organic solvents, have been separated by column chromatography (with isolation of 4 -7 , 13 and 14) and in the case of benzene as solvent as well with the aid of HPLC (isolated: 4 -7 , and five additional products 8-12). Photodegradation of 1 in water leads to the formation of only two photoproducts: 4 and 17 (separated only by HPLC). Identification has been achieved by spectroscopic methods and comparison (of retention times, UV and mass spectra) with authentic samples. Furthermore, the kinetics of the photodegradation of 1 in benzene and water (also after addition of titanium dioxide) has been established by HPLC-UV/VIS-technique. The interpretation of the kinetics allows conclusions towards the photodegradationmechanism, which is discussed in the paper. As expected, the addition of the photocatalyst titanium dioxide leads to a significant acceleration of the photodegradation.

CONSTITUENTS OF N-HEXANE FRACTION EXTRACTED FROM UVARIA GRANDIFLORA COLLECTED FROM QUANG TRI PROVINCE

2013 ◽  
pp. 81-86
Author(s):  
Thi Bich Hien Le ◽  
Thi Hong Oanh Le ◽  
Viet Duc Ho ◽  
Quoc Hung Vo ◽  
Thi Hoai Nguyen
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Organic Solvents ◽  
Mass Spectra ◽  
Hexane Fraction ◽  
Gas Chromatography Mass Spectrometry ◽  
Volatile Components ◽  
Ongoing Research ◽  
Chromatography Mass Spectrometry

Background: Today, conservation and development of indigenous knowledge of medicinal plants are the urgent demand of science. Uvaria grandiflora Roxb. ex Hornem which is used by medicinal experience of people of ethnic minorities in Quang Tri Province has shown in vitro cytotoxic activity in our previous screening tests. This article is an ongoing research to determine the chemical ingredients of this species. Materials: The aerial parts of Uvaria grandiflora Roxb. ex Hornem were collected from Quang Tri Province. Method: Fractional extraction was performed by using organic solvents. Volatile components were analysed by gas chromatography – mass spectrometry (GC-MS and indentified by comparison with published mass spectra database Wiley and NIST. Results: Two major components are δ-cadinene (42.94%) and caryophyllene (9.51%). Some ingredients that consist of γ-muurolene, ar-curcumene, calarene, β-vetivenene, β-bisabolene, cadina-1,4-diene and calacorene have never been reported from U.grandiflora collected from Quang Tri province. According to others references, some of these compounds have abundant bioactivities such as antimicrobial, antioxidant, antiinflammatory activities, especially α-humulene and caryophyllene with anticancer activities in vitro. Fractional extraction was performed by using organic solvents. Volatile components were analysed by gas chromatography – mass spectrometry (GC-MS and indentified by comparison with published mass spectra database Wiley and NIST. Conclusion: A total of sixteen volatile compounds were indentified in n-hexane fraction of Uvaria grandiflora Roxb. ex Hornem. Key words: Uvaria grandiflora, δ-cadinene, α-humulene, caryophyllene

UNTERSUCHUNGEN ÜBER DIE EXTRAKTION DES ROTEN KOBER-FARBSTOFFS DURCH ORGANISCHE LÖSUNGSMITTEL ZUR ÖSTROGENBESTIMMUNG IM HARN

1960 ◽  
Vol XXXV (I) ◽  
pp. 34-48 ◽  
Author(s):  
Gerd Ittrich
Keyword(s):  
Menstrual Cycle ◽  
Organic Solvents ◽  
Urine Sample ◽  
Phenol Derivatives ◽  
Organische Lösungsmittel ◽  
Colour Complex

ABSTRACT A series of organic solvents and phenol derivatives have been examined for the extraction of the pink Kober-colour complex. Optimal results could be achieved for fluorimetry by a solution of 2 % (w/v) p-nitrophenol and 1 % (v/v) ethanol in acetylenetetrabromide, when the green mercury line (546 mμ was used as primary light. The sensitivity, stability and specificity have been improved, compared with the previously described reaction. By changing the sequence of purification steps and by reducing the volume of the urine sample (5 ml) the method for the determination of total oestrogens has been simplified. Approximately 10 determinations can be done within 3–4 hours by one person. Recovery experiments and comparative determinations with a previously described method have been carried out. The excretion of total oestrogens in a complete menstrual cycle is determined with the described method.

A FACILE SYNTHESIS AND REACTIONS OF AMINO SELENOLO[2,3-b]PYRIDINE CARBOXYLATE

2015 ◽  
Vol 12 (1) ◽  
pp. 3910-3918 ◽  
Author(s):  
Dr Remon M Zaki ◽  
Prof Adel M. Kamal El-Dean ◽  
Dr Nermin A Marzouk ◽  
Prof Jehan A Micky ◽  
Mrs Rasha H Ahmed
Keyword(s):  
Biological Activity ◽  
Carbonyl Compounds ◽  
Mass Spectra ◽  
The Other ◽  
Pyridine Derivatives ◽  
Facile Synthesis ◽  
High Biological Activity ◽  
Basic Hydrolysis ◽  
Pyridine Carboxylate ◽  
Hydrolysis Of

 Incorporating selenium metal bonded to the pyridine nucleus was achieved by the reaction of selenium metal with 2-chloropyridine carbonitrile 1 in the presence of sodium borohydride as reducing agent. The resulting non isolated selanyl sodium salt was subjected to react with various α-halogenated carbonyl compounds to afford the selenyl pyridine derivatives 3a-f  which compounds 3a-d underwent Thorpe-Ziegler cyclization to give 1-amino-2-substitutedselenolo[2,3-b]pyridine compounds 4a-d, while the other compounds 3e,f failed to be cyclized. Basic hydrolysis of amino selenolo[2,3-b]pyridine carboxylate 4a followed by decarboxylation furnished the corresponding amino selenolopyridine compound 6 which was used as a versatile precursor for synthesis of other heterocyclic compound 7-16. All the newly synthesized compounds were established by elemental and spectral analysis (IR, 1H NMR) in addition to mass spectra for some of them hoping these compounds afforded high biological activity.

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