Borkomplexe mit Dicarbonsäuren: Bis(oxalato)borate und Bis(malonato)borate/Boron Complexes with Dicarboxylic Acids: Bis(oxalato)borates and Bis(malonato)borates

Abstract Several bis(oxalato)borates and bis(malonato)borates have been prepared in heterogeneous reaction from boric acid, dicarboxylic acid and dicarboxylic salt by refluxing in benzene under continuous separation of water. The compounds were characterized by their IR and 11B NMR spectra. The vibrational spectra of the bis(oxalato)borate are discussed in detail.

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IR and 13C, 17O, and 119Sn NMR spectra of some bis(1-butyl)tin(IV) carboxylates of dicarboxylic acids

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19911908 ◽

1991 ◽

Vol 56 (9) ◽

pp. 1908-1915 ◽

Cited By ~ 18

Author(s):

Jaroslav Holeček ◽

Antonín Lyčka ◽

Milan Nádvorník ◽

Karel Handlíř

Keyword(s):

Infrared Spectroscopy ◽

Nmr Spectroscopy ◽

Dicarboxylic Acid ◽

Nmr Spectra ◽

Dicarboxylic Acids ◽

119Sn Nmr ◽

Carboxylic Groups ◽

Cyclic Oligomers ◽

The Media ◽

Oxygen Atoms

Infrared spectroscopy and multinuclear (13C, 17O, and 119Sn NMR spectroscopy have been used to study the structure of bis(1-butyl)tin(IV) carboxylates of dicarboxylic acids (1-C4H9)2. Sn(X(COO)2), where X = (CH2)n (n = 0-8), CH=CH (cis and trans) and C6H4 (ortho and para).The crystalline compounds are formed by linear or cyclic oligomers or polymers whose basic building units represent a grouping composed of the central tin atom substituted by two 1-butyl groups and coordinated with both oxygen atoms of two anisobidentate carboxylic groups derived from different molecules of a dicarboxylic acid. The environment of the tin atom has a shape of a trapezoidal bipyramid. When dissolvet in non-coordinating solvents, the compounds retain the oligomeric character with unchanged structure of environment of the central tin atom. In the media of coordinating solvents the bis(1-butyl)tin(IV) carboxylates of dicarboxylic acids form complexes whose central hexacoordinated tin atom binds two molecules of the solvent trough their donor atoms. Carboxylic groups form monodenate linkages in these complexes.

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Conformational structure of ethylene glycol dibenzoate. Vibrational and NMR spectra

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19811913 ◽

1981 ◽

Vol 46 (8) ◽

pp. 1913-1929 ◽

Cited By ~ 3

Author(s):

Bohdan Schneider ◽

Pavel Sedláček ◽

Jan Štokr ◽

Danica Doskočilová ◽

Jan Lövy

Keyword(s):

Ethylene Glycol ◽

Vibrational Spectra ◽

Nmr Spectra ◽

Coupling Constants ◽

Conformational Structure ◽

Infrared And Raman Spectra ◽

H Nmr ◽

Liquid States ◽

Crystalline Forms ◽

C Nmr

It was found that three crystalline forms of ethylene glycol dibenzoate can be prepared. Infrared and Raman spectra of these three forms, as well as of the glassy and liquid states, were measured. From 3JHH coupling constants obtained by analysis of the 13C satellite band of the -CH2- group in 1H NMR spectra, and from the 3JCH coupling constants of the -CO.O.CH2- fragment obtained by analysis of the carbonyl band in 13C NMR spectra it was found that in the liquid state the -CH2-CH2- group exists predominantly in the gauche conformational structure, and the bonds C-O-C-C assume predominantly a trans orientation. The results of the analysis of NMR and vibrational spectra were used for the structural interpretation of conformationally sensitive bands in vibrational spectra of ethylene glycol dibenzoate.

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Preparation and Characterization of Dimercury(I) Monofluorophosphate(V), Hg2PO3F: Crystal Structure, Thermal Behavior, Vibrational Spectra, and Solid-State31P and19F NMR Spectra.

ChemInform ◽

10.1002/chin.200509017 ◽

2005 ◽

Vol 36 (9) ◽

Author(s):

Matthias Weil ◽

Michael Puchberger ◽

Enrique J. Baran

Keyword(s):

Crystal Structure ◽

Thermal Behavior ◽

Vibrational Spectra ◽

Nmr Spectra

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Preparation and Characterization of Dimercury(I) Monofluorophosphate(V), Hg2PO3F: Crystal Structure, Thermal Behavior, Vibrational Spectra, and Solid-State31P and19F NMR Spectra

Inorganic Chemistry ◽

10.1021/ic048741e ◽

2004 ◽

Vol 43 (26) ◽

pp. 8330-8335 ◽

Cited By ~ 11

Author(s):

Matthias Weil ◽

Michael Puchberger ◽

Enrique J. Baran

Keyword(s):

Crystal Structure ◽

Thermal Behavior ◽

Vibrational Spectra ◽

Nmr Spectra

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Pharmacological activity of new imidazole-4,5-dicarboxylic acid derivatives in dopaminergic transmission suppression ttests in mice and rats

Research Results in Pharmacology ◽

10.3897/rrpharmacology.6.57883 ◽

2020 ◽

Vol 6 (4) ◽

pp. 51-57

Author(s):

Ekaterina E. Yakovleva ◽

Eugeny R. Bychkov ◽

Maria M. Brusina ◽

Levon B. Piotrovsky ◽

Petr D. Shabanov

Keyword(s):

Locomotor Activity ◽

Dicarboxylic Acid ◽

Open Field ◽

Field Test ◽

Open Field Test ◽

Dicarboxylic Acids ◽

Dopaminergic Transmission ◽

Dose Dependent ◽

Derivatives Of ◽

Experimental Improvement

Objective: To study the antiparkinsonian activity of new 1,2-substituted imidazole-4,5-dicarboxylic acids in dopaminergic transmission suppression tests in mice and rats. Materials and methods: On a model of reserpine extrapyramidal disorders, the derivatives of imidazole-dicarboxylic acids (IEM2258, IEM2248, IEM2247) were injected into the lateral brain ventricles of the mice 30 minutes after injecting reserpine at the doses of 0.1–0.5 mmol. Locomotor activity was analyzed in the Open-field test 2 hours later. In the catalepsy model, the studied agents were injected, using a pre-implanted cannula, with a simultaneous intraperitoneal injection of haloperidol. The severity of catalepsy was assessed with the Morpurgo method. Amantadine was used as a comparator drug in all the tests. Results: It was shown that IEM2258 significantly increased the main indicators of locomotor activity in the Open-field test at all the studied doses. The value of the antiparkinsonian effect of IEM2258 at doses of 0.4–0.5 mmol significantly exceeded that of amantadine. The antiparkinsonian effect of IEM2247 was maximally expressed and was significantly different from those in the control and comparator group at doses of 0.2 and 0.3 mmol. For all the experimental groups, a significant decrease in the manifestations of catalepsy in comparison with control indexes was determined. Discussion: The results made it possible to suggest the involvement of imidazole-4,5-dicarboxylic acids derivatives in the process of experimental improvement of dopaminergic neuromodulation and efficiency in animals. Conclusion: The data showed a significant dose-dependent antiparkinsonian activity of new imidazole-4,5-dicarboxylic acid derivatives, which makes it promising to develop these agents and to further search for effective and safe antiparkinsonian drugs in this pharmacological class. Graphical abstract

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