Zobrazeno 1 - 10
of 94
pro vyhledávání: '"Alfred Kolbe"'
Publikováno v:
Zeitschrift für Physikalische Chemie. 220:1199-1210
The homoassociative behaviour in molecules carrying dominant hydrogen bond donor and strong hydrogen bond acceptor functionalities has been investigated on the example of differently substituted 2-(X-pyridyl-)ethan-1-ols withXequals to 4, 3, and 2, a
Publikováno v:
Journal of Molecular Structure. 690:25-29
The structure of Ph[PhC(O)NH]2PNC(O)Ph (2) in solid state and in solution is discussed on the basis of a crystal structure analysis and IR and Raman spectra. In crystalline state 2 forms dimers which are associated via two pairs of bifurcated (N
Publikováno v:
Journal of Molecular Structure. :239-246
Vibrational spectroscopic studies have been performed to obtain information regarding intermolecular forces acting in conjugates formed by dicarboxylic en-acids (fumaric acid, maleic acid) or their monobenzyl esters with esters of amino acids in the
Autor:
Alfred Kolbe, Monika Plass
Publikováno v:
Zeitschrift für Physikalische Chemie. 217:1411-1426
Diols exhibiting the structure (HO)CH2–(CH2)n–CH2(OH) withn=1 up ton=4, (HO)CH2–CH(OH)–CH3and cyclohexan-1,2-diols as well as cyclohexan-1,4-diol, which may establish different intramolecular interactions, are used as model substances to desc
Publikováno v:
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 59:2875-2881
The results of the X-ray structure analysis of the title compound (I) have been reported in [Synthesis (1997) 356]. Now we continue our efforts to understand the energy situation and the arrangements in the crystal, which will be strongly influenced
Autor:
Alfred Kolbe, Monika Plass
Publikováno v:
Zeitschrift für Physikalische Chemie. 217:1085-1096
Solute descriptors characterizing major interactions in solution are accessible based on quantitative structure-property relationships (QSPR). Parameters of such relationships should be additive for functional groups. Because added parameters of mono
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :2022-2027
The first synthesis of [26,27-2H6]24-epi-cathasterone 8via (20S)-3β-acetoxy-6,6-(ethylenedioxy)-20-formyl-5α-pregnane 5 starting from stigmasterol is described. The aldehyde 5 was alkylated with lithium butyldimethyl-(E)-2,3-dimethyl[3,3,3,4,4,4-2H
Publikováno v:
Journal of Molecular Structure. 570:203-214
The solvent effect on acetyl amino acid methyl esters and C- and N-protected di- and tripeptide derivatives has been studied in deuterium oxide (D2O), 1.1.1.3.3.3-hexafluoroisopropanol (HFiP), dimethyl sulfoxide (DMSO) and methylene chloride (CH2Cl2)
Publikováno v:
Zeitschrift für Chemie. 20:75-77
Autor:
Lothar Jäger, Helen Stoeckli-Evans, Alfred Kolbe, M. Biedermann, Henri-Jean Cristau, Nicolas Inguimbert, Marc Taillefer, Helmut Hartung
Publikováno v:
Journal of Molecular Structure. 519:211-218
The crystal and molecular structures of the title compounds have been determined. Ph2P(O)NC(NH2)NHPh (1) crystallizes in the space group P212121 with four molecules in the unit cell of dimensions: a=9.183(1), b=11.699(1), c=16.554(2) A. Ph2P(S)N