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1.
Richard Pastorek 《Monatshefte für Chemie / Chemical Monthly》1970,101(3):693-703
The following compounds were isolated and more closely studied by means of thermal analysis, X-ray scattering and IR absorption spectra and determination of solubilities: Pr2(H2 T)3 · 6 H2O, Nd2(H2 T)3 · 6 H2O, Sm2(H2 T)3 · 5 H2O, Gd2(H2 T)3 · 5 H2O, Tb2(H2 T)3 · 5 H2O, Dy2(H2 T)3 · 5 H2O, Ho2(H2 T)3 · 5 H2O, Er2(H2 T)3 · 5 H2O, PrH5 T 2 · 2 H2O, NdH5 T 2 · 2 H2O, SmH5 T 2 · 2 H2O, GdH5 T 2 · 3 H2O, TbH5 T 2 · 3 H2O, DyH5 T 2 · 3 H2O, HoH5 T 2 · 3 H2O, ErH5 T 2 · 3 H2O. 相似文献
2.
RNDr. Richard Pastorek Csc 《Monatshefte für Chemie / Chemical Monthly》1977,108(6):1379-1386
Compounds ScL
2(NO3)3·2 H2O,LnL
2(NO3)3·H2O (Ln=Pr, Sm, Eu, Gd, Tb),LnL
2(NO3)3·3 H2O (Ln=Nd, Dy, Ho, Er),LnL
3(NO3)3 (Ln=Pr, Nd) andLnL
3(NO3)3· ·3 H2O (Ln=Sc, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) were isolated. They were investigated by means of thermoanalysis, IR spectroscopy, X-ray diffraction and molar conductivity.
L=2,2-Bipyridin-N,N-dioxid=bpyO2=C10H8N2O2. 相似文献
L=2,2-Bipyridin-N,N-dioxid=bpyO2=C10H8N2O2. 相似文献
3.
Zusammenfassung Es wurden Komplexe des Typs YH2
TCl·2H2O, LaH2
TCl·3H2O und CeH2
TCl·3H2O isoliert. Die Individualität der Verbindungen wurde mit Hilfe der Thermoanalyse, IR-Absorptionsspektren und Röntgenstreuung geklärt.Complexes of the types YH2
TCl·2H2O, LaH2
TCl·3H2O and CeH2
TCl·3H2O were isolated, and the compounds characterized by thermogravimetric analysis, I. R. spectroscopy and X-ray diffraction.Mit 3 Abbildungen
Ln=Y, La, Ce; H4
T=C4H6O6. 相似文献
4.
Richard Pastorek 《Monatshefte für Chemie / Chemical Monthly》1969,100(6):2039-2047
Zusammenfassung Nachstehende Verbindungen wurden hergestellt: Pr4
T
3·13 H2O, Nd4
T
3·12 H2O, Sm4
T
3·12 H2O, Gd4
T
3·12 H2O, Tb4
T
3·13 H2O, Dy4
T
3·12 H2O, Ho4
T
3·14 H2O, Er4
T
3·14 H2O, PrH2
TCl·3 H2O, NdH2
TCl·3 H2O, SmH2
TCl·3 H2O, GdH2
TCl·4 H2O, TbH2
TCl·3 H2O, DyH2
TCl·2 H2O, HoH2
TCl·3 H2O, ErH2
TCl·3 H2O. Die Präparate wurden mit Thermoanalyse, IR-Absorptionsspektren, Röntgenstreuung und hinsichtlich Löslichkeit weiter untersucht.
Ln=Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er.
H4 T=C4H6O6. 相似文献
Chemistry of the rare earth metals, XXVI: Tartrates of the rere earths of the types Ln4T3·xH 2 O, and their reaction withHCl
The above series of compounds has been prepared and further characterized by thermal analysis, IR spectra, X-ray diffraction, and solubility.
Ln=Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er.
H4 T=C4H6O6. 相似文献
5.
Richard Pastorek 《Monatshefte für Chemie / Chemical Monthly》1968,99(2):676-685
Zusammenfassung Die Substanzen LaHT
*·4 H2O, La4
T
3·14 H2O, KLaT· ·3 H2O, K2LaTOH·4 H2O, K2LaH3
T
2·4 H2O, K3LaH2
T
2· ·4 H2O und K4LaHT
2·5 H2O wurden isoliert und durch Thermoanalyse, IR-Absorptionspektren und Röntgenstreuung näher charakterisiert. Es wurde auch ihre Löslichkeit in Wasser bestimmt.
Mit 7 Abbildungen 相似文献
The following compounds where isolated, and characterized by means of thermal analysis, I. R. spectroscopy and X-ray diffraction. Their solubilities in aqueous solution were determined: LaHT·4 H2O, La4 T 3·14 H2O, KLaT·3 H2O, K2LaTOH· ·4 H2O, K2LaH3 T 2·4 H2O, K3LaH2 T 2·4 H2O, K4LaHT 2· ·5 H2O.
Mit 7 Abbildungen 相似文献
6.
Luk&#x; Petera Klaudia Mrazikova Lukas Nejdl Kristyna Zemankova Marketa Vaculovicova Adam Pastorek Svatopluk Civis Petr Kubelik Alan Heays Giuseppe Cassone Jiri Sponer Martin Ferus Judit Sponer 《Molecules (Basel, Switzerland)》2021,26(8)
Synthesis of RNA nucleobases from formamide is one of the recurring topics of prebiotic chemistry research. Earlier reports suggest that thymine, the substitute for uracil in DNA, may also be synthesized from formamide in the presence of catalysts enabling conversion of formamide to formaldehyde. In the current paper, we show that to a lesser extent conversion of uracil to thymine may occur even in the absence of catalysts. This is enabled by the presence of formic acid in the reaction mixture that forms as the hydrolysis product of formamide. Under the reaction conditions of our study, the disproportionation of formic acid may produce formaldehyde that hydroxymethylates uracil in the first step of the conversion process. The experiments are supplemented by quantum chemical modeling of the reaction pathway, supporting the plausibility of the mechanism suggested by Saladino and coworkers. 相似文献
7.
Zdeněk Trávníček Prof. Dr. Richard Pastorek Pavel Štarha Igor Popa Václav Slovák 《无机化学与普通化学杂志》2010,636(8):1557-1564
The nickel(II) N‐benzyl‐N‐methyldithiocarbamato (BzMedtc) complexes [Ni(BzMedtc)(PPh3)Cl] ( 1 ), [Ni(BzMedtc)(PPh3)Br] ( 2 ), [Ni(BzMedtc)(PPh3)I] ( 3 ), and [Ni(BzMedtc)(PPh3)(NCS)] ( 4 ) were synthesized using the reaction of [Ni(BzMedtc)2] and [NiX2(PPh3)2] (X = Cl, Br, I and NCS). Subsequently, complex 1 was used for the preparation of [Ni(BzMedtc)(PPh3)2]ClO4 ( 5 ), [Ni(BzMedtc)(PPh3)2]BPh4 ( 6 ), and [Ni(BzMedtc)(PPh3)2]PF6 ( 7 ). The obtained complexes 1 – 7 were characterized by elemental analysis, thermal analysis and spectroscopic methods (IR, UV/Vis, 31P{1H} NMR). The results of the magnetochemical and molar conductivity measurements proved the complexes as diamagnetic non‐electrolytes ( 1 – 4 ) or 1:1 electrolytes ( 5 – 7 ). The molecular structures of 4 and 5· H2O were determined by a single‐crystal X‐ray analysis. In all cases, the NiII atom is tetracoordinated in a distorted square‐planar arrangement with the S2PX, and S2P2 donor set, respectively. The catalytic influence of selected complexes 1 , 3 , 5 , and 6 on graphite oxidation was studied. The results clearly indicated that the presence of the products of thermal degradation processes of the mentioned complexes has impact on the course of graphite oxidation. A decrease in the oxidation start temperatures by about 60–100 °C was observed in the cases of all the tested complexes in comparison with pure graphite. 相似文献
8.
Frantisek Brezina Pavel Kopel Zdenek Sindelar Richard Pastorek Jerzy Mrozinski 《Transition Metal Chemistry》1995,20(1):56-58
Summary The complexes [Ni(en)3]MoS4, [Ni(dien)2]MoS4 and [Ni(phen)2(MoS4)]·2H2O (en = ethylenediamine, dien = diethylenetriamine, phen = 1,10-phenanthroline) were prepared. On the basis of their magnetochemical and spectral properties the compounds can be characterized as octahedral nickel(II) complexes. The complexes were also studied by c.v. Chemical oxidation of [Ni(en)3]MoS4 affords [Ni(en)MoS4]2SO4; this complex has been characterized by i.r. and e.p.r. spectroscopy and by magnetic measurements. 相似文献
9.
A series of novel octahedral nickel(II) dithiocarbamate complexes involving bidentate nitrogen-donor ligands (phen = 1,10-phenanthroline, bpy = 2,2′-bipyridine) or a tetradentate ligand (cyclam = 1,4,8,11-tetraazacycloteradecane) of the composition [Ni(BzMetdtc)(phen)2]ClO4 (1), [Ni(Pe2dtc)(phen)2]ClO4 (2), [Ni(Bzppzdtc)(phen)2]ClO4 · CHCl3 (3), [Ni(Bzppzdtc)(phen)2](SCN) (4), [Ni(BzMetdtc)(bpy)2]ClO4 · 2H2O (5), [Ni(Pe2dtc)(cyclam)]ClO4 (6), [Ni(BzMetdtc)2(cyclam)] (7), [Ni(Bz2dtc)2(cyclam)] (8) and [Ni(Bz2dtc)2(phen)] (9) (BzMetdtc = N,N-benzyl-methyldithiocarbamate(1-) anion, Pe2dtc = N,N-dipentyldithiocarbamate(1-) anion, Bz2dtc = N,N-dibenzyldithiocarbamate(1-) anion, Bzppzdtc = 4-benzylpiperazinedithiocarbamate(1-) anion), have been synthesized. Spectroscopic (electronic and infrared), magnetic moment and molar conductivity data, and thermal behaviour of the complexes are discussed. Single crystal X-ray analysis of 3 and 8 confirmed a distorted octahedral arrangement in the vicinity of the nickel atom with a N4S2 donor set. They represent the first X-ray structures of such type complexes. The catalytic influence of complexes 2, 3, 6, and 7 on graphite oxidation was studied and discussed. 相似文献
10.
Zdeněk Trávníček Richard Pastorek Zdeněk Šindelář Roman Klička Jaromír Marek 《Transition Metal Chemistry》1996,21(1):81-84
Summary The reaction of bis(iso-propylxanthato)nickel(II) with 1,2-bis(diphenylphosphino)ethane (dppe) in a 11 molar ratio affords [Ni(S2CO)(dppe)], which, on the basis of its magneto-chemical and spectral properties, has been characterized as a square-planar Ni complex. The complex was one-electron irreversibly oxidized at a potential of 0.673 V versus s.c.e. The crystal and molecular structure of a twinned crystal of the complex has been elucidated, and consists of two crystallographically independent molecules in which each Ni atom is coordinated by two S atoms from the dithiocarbonate ligand and two P atoms from the dppe ligand in an approximately square-planar arrangement. 相似文献