Heinz-Jürgen Kroth
Technical University of Berlin
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Featured researches published by Heinz-Jürgen Kroth.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 1995
Petra Geissler; Thomas M. Klapötke; Heinz-Jürgen Kroth
Abstract The 14 N NMR spectra of the halogen azides XN 3 (X Cl, Br, I), the neutral arsenic(III) compounds (CH 3 ) n As(N 3 ) 3− n ( n = 0, 1, 2) as well as the cationic arsenic(V) species [As(N 3 ) 4 ] + are reported. For all compounds—including the cationic [As(N 3 ) 4 ] + (AsF 6 − salt)—the covalent character of the element-azide bond (element = halogen, arsenic) is demonstrated by the appearance of three distinct 14 N NMR signals.
Journal of Organometallic Chemistry | 1976
Wolf-Walther du Mont; Heinz-Jürgen Kroth
Abstract Nucleophilic attack of tertiary phosphines at tellurium in R 3 PTe and at iodine in R 3 PI + is indicated by rapid Te (or I + ) transfer reactions in the systems R 3 PTe PR 3 and R 3 PI + /PR 3 (R = (CH 3 ) 3 C, (CH 3 ) 2 N). Linear intermediates of the type R 3 PYPR3 (Y = Te, I + ) are proposed.
Journal of Organometallic Chemistry | 1976
W.-W. Du Mont; Heinz-Jürgen Kroth; H. Neumann; P.J. Corvan; J.J. Zuckerman
Abstract Tin 119m Mossbauer Quadrupole Splitting (Q.S.) data for several trimethyltin amines, phosphines, arsines, stibines and sulfides are compared with the larger values found for the transition metal carbonyl complexes of the phosphine and sulfide derivatives which reveal the polarizing effect of donor action by the adjacent group V or VI atom.
Journal of Organometallic Chemistry | 1976
Joachim Held; Heinz-Jürgen Kroth; Wolf-Walther du Mont; Bernd Wöbke
Organogermyl- and organostannylphosphines like (t-C4H9)4[(CH3)2GeCl]P, (t-C4H9)2[(CH3)2GeOSi(CH3)3]P, [(CH3)2GeCl]3P, (t-C4H9)2[(CH3)2SnCl]P or (t-C4H9)2[(CH3)2SnBr]P react with tetracarbonylnickel under formation of the corresponding organometalphosphinetricarbonylnickel(0)-complexes. The vibrational spectra and 1H and 31P NMR spectra of the new compounds are discussed.
Zeitschrift für Naturforschung B | 2005
Konstantin A. Rufanov; Dominique M. M. Freckmann; Heinz-Jürgen Kroth; Stefan Schutte
Lu(CH2SiMe3)3(THF)2 (2) decomposes slowly at room temperature with formation of Me4Si. In order to understand the mechanism of this elimination process, Lu(CH2SiMe3)3([D8]-THF)2 (1), Lu(CH2SiMe3)3(THF)(DME) (3), and Lu(CH2SiMe3)3(THF)(diglyme) (4) were prepared. The results of 1H NMR spectroscopic studies of the decomposition in solution exclude an α- as well as a β -H elimination mechanism and point towards a γ -H elimination. The molecular structure of 4 has been determined by single crystal X-ray diffraction.
Angewandte Chemie | 2004
Stefan Schutte; Heinz-Jürgen Kroth; Dieter Lentz
Chemische Berichte | 1975
Lutz Rösch; Heinrich Neumann; Heinz-Jürgen Kroth
Angewandte Chemie | 1977
Wolf-Walther du Mont; Heinz-Jürgen Kroth
Chemische Berichte | 1976
Wolf-Walther du Mont; Heinz-Jürgen Kroth
Chemische Berichte | 1976
Wolf-Walther du Mont; Heinz-Jürgen Kroth