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Featured researches published by Heinz-Jürgen Kroth.


Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 1995

14N NMR SPECTRA OF COVALENT HALOGEN AND ARSENIC AZIDES: XN3 (X=CL, BR, I),(CH3)NAS(N3)3-N (N=0, 1, 2) AND AS(N3)4+

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

Zur reaktion von organophosphinen mit chalkogenen und ithalogenen: Rasche übertragung von tellur und jod zwischen phosphinen

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 PYPR3 (Y = Te, I + ) are proposed.


Journal of Organometallic Chemistry | 1976

Tin-119m Mössbauer spectra of trimethyltin phosphines used as ligands in transition metal carbonyl complexes

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

Organometallphosphin-substituierte übergangsmetallkomplexe : XXI. Tricarbonylnickel(0)-komplexe von germyl- und stannylphosphinen mit funktionellen gruppen an germanium und zinn

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

Studies on the Thermolysis of Ether-Stabilized Lu(CH2SiMe3)3. Molecular Structure of Lu(CH2SiMe3)3(THF)(diglyme)

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

Butenyl-Substituted Alkaline-Earth Metallocenes: A First Step towards Olefin Complexes of the Alkaline-Earth Metals†

Stefan Schutte; Heinz-Jürgen Kroth; Dieter Lentz


Chemische Berichte | 1975

Organometallphosphin-substituierte Übergangsmetallkomplexe, XVIII. Tricarbonyl(organometallphosphin)nickel(0)-Komplexe

Lutz Rösch; Heinrich Neumann; Heinz-Jürgen Kroth


Angewandte Chemie | 1977

Dimeric Bis(di-tert-butylphosphino)stannanediyl: A Cyclic Phosphorus-Tin Ylide†

Wolf-Walther du Mont; Heinz-Jürgen Kroth


Chemische Berichte | 1976

Organo[chlor(methyl)stannyl]phosphine und -amine

Wolf-Walther du Mont; Heinz-Jürgen Kroth


Chemische Berichte | 1976

Redoxreaktionen zwischen Tri‐tert‐butylphosphin und Element(IVb)‐tetrachloriden: Tri‐tert‐butylchlorphosphonium‐Salze

Wolf-Walther du Mont; Heinz-Jürgen Kroth

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Wolf-Walther du Mont

Technical University of Berlin

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Heinrich Neumann

Technical University of Berlin

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Lutz Rösch

Technical University of Berlin

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W.-W. Du Mont

Technical University of Berlin

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Stefan Schutte

Technical University of Berlin

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Brigitte Neudert

Technical University of Berlin

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Dieter Lentz

Free University of Berlin

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Joachim Held

Technical University of Berlin

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Petra Geissler

Technical University of Berlin

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Bernd Wöbke

Technical University of Berlin

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