@article{KleinpeterThomasFischer1995, author = {Kleinpeter, Erich and Thomas, Steffen and Fischer, G.}, title = {13C and 15N NMR study of 1,2,4-Triazolo[1,5-a]pyrimidines with one tautomerism-introducing substituent}, year = {1995}, language = {en} } @article{Kleinpeter1995, author = {Kleinpeter, Erich}, title = {Conformational analysis of six-membered sulfur-containing heterocycles}, year = {1995}, language = {en} } @article{KochStarkeKleinpeter1995, author = {Koch, Andreas and Starke, Ines and Kleinpeter, Erich}, title = {Conformational study of Dibenzo crown ethers and their complexation with Li+ and Na+}, year = {1995}, language = {en} } @article{KleinpeterPihlaja1995, author = {Kleinpeter, Erich and Pihlaja, Kalevi}, title = {Functions containing a thiocarbonyl group and at least one halogen, also at least one chalcogen and no halogen}, year = {1995}, language = {en} } @article{Kleinpeter1995, author = {Kleinpeter, Erich}, title = {Effect of the variation of ring size of cyclic NR2 substituents on the barrier to rotation in amides, thioamides and related compounds}, year = {1995}, language = {en} } @article{KochKleinpeter1995, author = {Koch, Andreas and Kleinpeter, Erich}, title = {Ab-initio study and semiempirical calculations of keto-enol tautomerism of triazolopyrimidines}, year = {1995}, language = {en} } @article{KleinpeterStroehlPeinze1995, author = {Kleinpeter, Erich and Str{\"o}hl, D. and Peinze, S.}, title = {Solution conformation of tripeptides by NMR spectroscopy and force field calculations}, year = {1995}, language = {en} } @article{KleinpeterKochHeydenreichetal.1995, author = {Kleinpeter, Erich and Koch, Andreas and Heydenreich, Matthias and Chatterjee, S. K. and Rudorf, Wolf-Dieter}, title = {Study of the pi-electron distribution in push-pull alkenes by 1H and 13C NMR spectroscopy, IV : the conformation and dynamic behaviour of substituted N-Phenyl-2,3-dihydro-4(1H)-pyridones}, year = {1995}, language = {en} } @article{StarkeKochHoldtetal.1995, author = {Starke, Ines and Koch, Andreas and Holdt, Hans-J{\"u}rgen and Kleinpeter, Erich}, title = {1H, 13C, and 15N NMR study of the solution structure of metabridged bis(benzo-15-crown-5-ether)s}, year = {1995}, language = {en} } @article{StarkeKochUhlemannetal.1995, author = {Starke, Ines and Koch, Andreas and Uhlemann, Erhard and Kleinpeter, Erich}, title = {Nuclear-magnetic-resonance studies and molecular modelling of the solution structure of some dibenzo crown- ethers and their complexes}, year = {1995}, language = {en} } @article{LehmannKleinpeter1995, author = {Lehmann, J. and Kleinpeter, Erich}, title = {1H NMR lanthanide-induced shift investigations of highly flexible molecules, part III. Applications to alcohols, aldehydes, esters and amines}, year = {1995}, language = {en} } @article{OszczapowiczWawerDargatzetal.1995, author = {Oszczapowicz, J. and Wawer, I. and Dargatz, M. and Kleinpeter, Erich}, title = {Amidines .34. N-15 NMR spectra of trisubstituted amidines - substituent effects}, year = {1995}, language = {en} } @article{KleinpeterStroehlPeinzeetal.1996, author = {Kleinpeter, Erich and Str{\"o}hl, D. and Peinze, S. and Brandt, W. and Schmidt, R. and Neubert, K.}, title = {The solution conformation of cyclic ß-casomorphine-5 analogues}, year = {1996}, language = {en} } @article{PihlajaLehmannSchrothetal.1996, author = {Pihlaja, Kalevi and Lehmann, S. and Schroth, W. and G{\"a}ber, M. and Kleinpeter, Erich}, title = {Electron impact induced fragmentation of dibenzo crown ethers}, year = {1996}, language = {en} } @article{Kleinpeter1996, author = {Kleinpeter, Erich}, title = {The structure of hydantoins in solution and in the solid state}, year = {1996}, language = {en} } @article{KleinpeterStarkeStroehletal.1996, author = {Kleinpeter, Erich and Starke, Ines and Str{\"o}hl, D. and Holdt, Hans-J{\"u}rgen}, title = {NMR spectroscopic study of the solution structure and complexational behaviour of bis-benzocrown ethers}, year = {1996}, language = {en} } @article{KochThomasKleinpeter1997, author = {Koch, Andreas and Thomas, Steffen and Kleinpeter, Erich}, title = {Ab-initio study, semi-empirical calculation and NMR spectroscopy of keto-enol tautomerism of triazolopyrimidines}, year = {1997}, language = {en} } @article{KleinpeterHeydenreichKalderetal.1997, author = {Kleinpeter, Erich and Heydenreich, Matthias and Kalder, L. and Koch, Andreas and Henning, Dietrich and Kempter, Gerhard}, title = {NMR spectroscopic and theoretical structural analysis of 5,5-disubstituted hydantoins in solution}, year = {1997}, language = {en} } @article{KleinpeterStarkeStroehletal.1997, author = {Kleinpeter, Erich and Starke, Ines and Str{\"o}hl, D. and Holdt, Hans-J{\"u}rgen}, title = {NMR spectroscopic study of the solution structure and complexational behaviour of bis-benzocrown ethers}, year = {1997}, language = {en} } @article{HeydenreichKochKleinpeteretal.1997, author = {Heydenreich, Matthias and Koch, Andreas and Kleinpeter, Erich and Zimmermann, Thomas}, title = {Dynamic NMR study of the flexibility of 2-amino-3-aroyl-4,6-diaryl-pyrylium salts}, issn = {0937-0633}, doi = {10.1007/s002160050205}, year = {1997}, language = {en} } @article{KleinpeterKochFischeretal.1997, author = {Kleinpeter, Erich and Koch, Andreas and Fischer, G. and Askolin, C.-P.}, title = {13 C NMR, 15 N NMR and quantum-chemical study of the tautomerism of 2-substituted 5-ME-7-OH-1,2,4-triazolo[1,5- a]pyrimidines}, year = {1997}, language = {en} } @article{GrotjahnDrexlerJaegeretal.1997, author = {Grotjahn, Manuela and Drexler, Hans-Joachim and J{\"a}ger, Norbert and Kleinpeter, Erich and Holdt, Hans-J{\"u}rgen}, title = {Molecular dynamic and conformational study of an unsaturated 12-crown-S202 ether and its AgI complexes}, year = {1997}, language = {en} } @article{SarodnickHilfertKempteretal.1997, author = {Sarodnick, Gerhard and Hilfert, Liane and Kempter, Gerhard and Kleinpeter, Erich}, title = {Reactin of 2-(halogenomethyl)-quinoxalines and quinolines with hydroxybenzoic acids and their esters}, year = {1997}, language = {en} } @article{ThomasBruehlHeilmannetal.1997, author = {Thomas, Steffen and Br{\"u}hl, Iris and Heilmann, Dieter and Kleinpeter, Erich}, title = {13 C NMR Chemical shift calculations for some substituted pyridines - a comparative consideration}, year = {1997}, language = {en} } @article{KochKleinpeter1997, author = {Koch, Andreas and Kleinpeter, Erich}, title = {Study of the tautomerism by experimentally and theoretically estimated 13C and 15N chemical shifts}, year = {1997}, language = {en} } @article{KochKleinpeter1997, author = {Koch, Andreas and Kleinpeter, Erich}, title = {Restricted rotation about particial C, N Double Bond}, year = {1997}, language = {en} } @article{Kleinpeter1997, author = {Kleinpeter, Erich}, title = {The Structure of hydantions in solution and in the solid state}, year = {1997}, language = {en} } @article{KleinpeterHeydenreichKalderetal.1997, author = {Kleinpeter, Erich and Heydenreich, Matthias and Kalder, L. and Koch, Andreas and Henning, Dietrich and Kempter, Gerhard and Benassi, Rois and Taddei, F.}, title = {NMR spectroscopic and theoretical structural analysis of 5,5-disubstituted hydantoins in solution}, year = {1997}, language = {en} } @article{BenassiBregullaFriedrichetal.1998, author = {Benassi, Rois and Bregulla, Antje and Friedrich, Alwin and Henning, Dietrich and Heydenreich, Matthias and Mickler, Wulfhard and Kleinpeter, Erich and Kempter, Gerhard and Schilde, Uwe and Taddei, F.}, title = {NMR spectroscopic and theoretical structural study of 5-exo-methylene-substituted hydantoins}, year = {1998}, language = {en} } @article{ReicheStarkeKleinpeteretal.1998, author = {Reiche, K. B. and Starke, Ines and Kleinpeter, Erich and Holdt, Hans-J{\"u}rgen}, title = {Host-guest complexation of imine-type meta-bridged bis(benzo crown ether)s with alkali cations in the gas phase under FAB conditions}, year = {1998}, language = {en} } @article{KleinpeterHeydenreichWolleretal.1998, author = {Kleinpeter, Erich and Heydenreich, Matthias and Woller, Jochen and Wolf, Gunter and Koch, Andreas and Kempter, Gerhard and Pihlaja, Kalevi}, title = {Configuration and stereodynamics of exo/endoisomeric push-pull alkenes of pentadiene structure}, year = {1998}, language = {en} } @article{HilfertSarodnickKempteretal.1998, author = {Hilfert, Liane and Sarodnick, Gerhard and Kempter, Gerhard and Kleinpeter, Erich}, title = {1H, 13C and 15 N NMR study and molecular modelling of 2,3- disubstituted quinoxalines with sterically hinderered aromatic and heteroaromatic substituents}, year = {1998}, language = {en} } @article{Kleinpeter1998, author = {Kleinpeter, Erich}, title = {Conformational analysis of saturated six-membered oxygen-containing heterocyclic rings}, year = {1998}, language = {en} } @article{HeydenreichKochRistauetal.1998, author = {Heydenreich, Matthias and Koch, Andreas and Ristau, Thomas and Knoll, Susanne and Heinicke, Jochen and Sieler, Joachim and Niemitz, Matthias and M{\"u}hlst{\"a}dt, Manfred and Kleinpeter, Erich}, title = {Conformational analysis of sulfur-containing heterocycles ; part I: synthesis and structural determination of diastereomerically pure 4,6-bis(phenoxymethyl)-1,2,5-trithiepanes}, year = {1998}, language = {en} } @article{DrexlerGrotjahnKleinpeteretal.1999, author = {Drexler, Hans-Joachim and Grotjahn, Manuela and Kleinpeter, Erich and Holdt, Hans-J{\"u}rgen}, title = {A novel polymeric disilver(I) complex containing both macrocyclic- and linear-coordinate silver(I) centres : [Ag-2(mn-15S(2)O(3))](infinity)(ClO4)(2 infinity) (mn-15S(2)O(3) = maleonitrile-dithia[15]crown-5)}, year = {1999}, language = {en} } @article{DrexlerStarkeGrojahnetal.1999, author = {Drexler, Hans-Joachim and Starke, Ines and Grojahn, Manuela and Reinke, H. and Kleinpeter, Erich and Holdt, Hans-J{\"u}rgen}, title = {SbCl3, BiCl3 and Na+ Complexes of maleonitrile-dithiacrown ethers: synthesis, crystal structures and DEP-MS experiments}, year = {1999}, language = {en} } @article{GrotjahnJaegerDrexleretal.1999, author = {Grotjahn, Manuela and J{\"a}ger, Norbert and Drexler, Hans-Joachim and Holdt, Hans-J{\"u}rgen and Kleinpeter, Erich}, title = {Molecular modeling study of the PtCl2 complexes of unsaturated S2On+1- coronands: dynamic simulations and investigation of the ring interconversion}, year = {1999}, language = {en} } @article{BenassiBregullaHenningetal.1999, author = {Benassi, Rois and Bregulla, Antje and Henning, Dietrich and Heydenreich, Matthias and Kempter, Gerhard and Kleinpeter, Erich and Taddei, F.}, title = {NMR-spectroscopic and theoretical structural analysis of 5-benzyl subtituted hydantoins in solutions}, year = {1999}, language = {en} } @article{ZucchiCorniaBoeseetal.1999, author = {Zucchi, Claudia and Cornia, Andrea and Boese, Roland and Kleinpeter, Erich and Alper, Howard and Palyi, Gyula}, title = {Preparation and molecular structures of benzyl- and phenyl-acetycobalt-carbonyls}, year = {1999}, language = {en} } @article{SchollKochHenningetal.1999, author = {Scholl, S. and Koch, Andreas and Henning, Dietrich and Kempter, Gerhard and Kleinpeter, Erich}, title = {The influence of structure and lipophilicity of hydantoin derivatives on anticonvulsant activity}, year = {1999}, language = {en} } @article{GrotjahnKleinpeter1999, author = {Grotjahn, Manuela and Kleinpeter, Erich}, title = {Conformational behaviour of N-tosyl-substituted diaza-crown ethers}, year = {1999}, language = {en} } @article{ReicheStarkeKleinpeteretal.1999, author = {Reiche, K. B. and Starke, Ines and Kleinpeter, Erich and Holdt, Hans-J{\"u}rgen and Pihlaja, Kalevi and Oksaman, P. and Ovcharenko, V. V.}, title = {Fragmentation of imine-type meta-bridged bis(benzo crown ether)s under electron impact}, year = {1999}, language = {en} } @article{KleinpeterHilfertKoch1999, author = {Kleinpeter, Erich and Hilfert, Liane and Koch, Andreas}, title = {NMR spectroscopic and ab-initio MO study of sterically hindered 2,3-disubstituted quinoxalines}, year = {1999}, language = {en} } @article{BenassiBertariniKleinpeteretal.2000, author = {Benassi, Rois and Bertarini, C. and Kleinpeter, Erich and Taddei, F. and Thomas, Steffen}, title = {Exocyclic push-pull conjugated compounds : Part 1 ; theoretical study of the effect of ring size on the structure, electronic properties and rotational barriers of cyclic analogoues of 1,1-diamino-2.2-dicyanoethylene}, year = {2000}, language = {en} } @article{StarkeHolzbergerKammetal.2000, author = {Starke, Ines and Holzberger, Anja and Kamm, Birgit and Kleinpeter, Erich}, title = {Qualitative and quantitative analysis of carbohydrates in green juices (wild mix grass and alfalfa) from a green biorefinery by gas chromatography/mass spectrometry}, year = {2000}, language = {en} } @article{KleinpeterHilfertKoch2000, author = {Kleinpeter, Erich and Hilfert, Liane and Koch, Andreas}, title = {GIAO-HF/DFT calculation of C-13 and N-15 chemical shifts for studying tautomerism and intramolecular hydrogen bonding in 2,3-disubstituted quinoxalines}, year = {2000}, language = {en} } @article{BenassiBertariniKleinpeteretal.2000, author = {Benassi, Rois and Bertarini, C. and Kleinpeter, Erich and Taddei, F.}, title = {Exocyclic push-pull conjugated compounds, Part 2 : the effect of donor and acceptor substituents on the rotational barrier of push-pull ethylenes}, year = {2000}, language = {en} } @article{BenassiBertariniHilfertetal.2000, author = {Benassi, Rois and Bertarini, C. and Hilfert, Liane and Kempter, Gerhard and Kleinpeter, Erich and Spindler, J{\"u}rgen and Taddei, F. and Thomas, Steffen}, title = {Exocyclic push-pull conjugated compounds : Part 3}, year = {2000}, language = {en} } @article{Kleinpeter2000, author = {Kleinpeter, Erich}, title = {Recent advances in studying tautomerism in solution and in solid state}, year = {2000}, language = {en} } @article{KleinpeterGrotjahnKlinkaetal.2001, author = {Kleinpeter, Erich and Grotjahn, Manuela and Klinka, Karel D. and Drexler, Hans-Joachim and Holdt, Hans-J{\"u}rgen}, title = {Conformational and complexational study of some maleonitrile mixed oxadithia crown ethers by NMR spectroscopy and molecular modelling}, year = {2001}, abstract = {The macrocyclic ring interconversion of four maleonitrile mixed oxadithia crown ethers of variable ring size, mn-12-S2O2, mn-15-S2O3, mn-18-S2O4 and fn-12-S2O2, were studied by 1H and 13C NMR spectroscopy and by molecular modelling. The barriers to ring interconversion were estimated using variable temperature NMR spectroscopy and from the calculated activation energies, together with the spin-lattice relaxation times of the CH2 carbon atoms, conclusions were drawn regarding the intramolecular flexibility of the crown ethers in both the free state as well as the complexed state incorporating either AgI, BiIII, SbIII, PdII or PtII metal cations. Furthermore, both the stoichiometry of the complexes and the coordination sites of the crown ethers to the various cations were also clearly implicated. Molecular modelling was also utilised to ascertain the preferred conformers of the four compounds and their corresponding complexes, the results of which corroborated the experimental NMR results to a high degree.}, language = {en} }