Helmut G. Alt

Overview

Best Publications

• Effect of the Nature of Metallocene Complexes of Group IV Metals on Their Performance in Catalytic Ethylene and Propylene Polymerization

  Helmut G. Alt;Alexander Köppl

  1493
  Citations

• Fluorenyl complexes of zirconium and hafnium as catalysts for olefin polymerization

  Helmut G. Alt;Edmond Samuel

  179
  Citations

• The heterogenization of homogeneous metallocene catalysts for olefin polymerization

  Helmut G. Alt

  155
  Citations

• Substituted 1-(2-pyridyl)-2-azaethene-(N,N)-nickel dibromide complexes as catalyst precursors for homogeneous and heterogeneous ethylene polymerization

  Alexander Köppl;Helmut G. Alt

  139
  Citations

• Molecular structures of the bis(.eta.5-indenyl)dimethyl derivatives of titanium, zirconium, and hafnium

  Jerry L. Atwood;William E. Hunter;Duane C. Hrncir;Edmond. Samuel

  137
  Citations

• Metallocene complexes as catalysts for olefin polymerization

  Helmut G. Alt

  131
  Citations

• Photochemical reactions of dimethyl derivatives of titanocene, zirconocene, and hafnocene

  Unknown

  120
  Citations

• [Cp2Ti(PMe3)2]—A Versatile Source of Titanocene Derivatives

  Lawrence B. Kool;Marvin D. Rausch;Helmut G. Alt;Max Herberhold

  117
  Citations

• Verbrückte Bis(fluorenyl)komplexe des zirconiums und hafniums als hochreaktive katalysatoren bei der homogenen olefinpolymerisation. Die molekülstrukturen von (C13H9C2H4C13H9) und (η5:η5-C13H8C2H4 C13H8)ZrCl2

  Helmut G. Alt;Wolfgang Milius;Syriac J. Palackal

  116
  Citations

• The synthesis, characterization and polymerization behavior of ansa cyclopentadienyl fluorenyl complexes; the X-ray structures of the complexes [(C13H8)SiR2(C5H4)]ZrCl2 (RMe or Ph)

  Konstantinos Patsidis;Helmut G Alt;Wolfgang Milius;Syriac J Palackal

  115
  Citations

• Preparation, characterization and reactivity of Cp2M(PMe3)2 complexes (M=Ti, Zr): the molecular structure of Cp2Zr(PMe3)2

  L.B. Kool;M.D. Rausch;H.G. Alt;M. Herberhold

  115
  Citations

• The molecular structure of 1,1-bis(.eta.5-cyclopentadienyl)-2,3,4,5-tetraphenyltitanole and its hafnium analogue

  Jerry L. Atwood;William E. Hunter;Helmut Alt;Marvin D. Rausch

  114
  Citations

• Organotin esters of 3-(2-furanyl)-2-propenoic acid: their characterization and biological activity

  Muhammad Danish;Helmut G. Alt;Amin Badshah;Saqib Ali

  113
  Citations

• Heterogenized iron(II) complexes as highly active ethene polymerization catalysts

  Roland Schmidt;M.Bruce Welch;Syriac J Palackal;Helmut G Alt

  112
  Citations

• Photochemical investigations of di-η5-cyclopentadienyldimethyltitanium and deuterated analogs

  Marvin D. Rausch;Wyndham H. Boon;Helmut G. Alt

  102
  Citations

• The forms of phosphorus in humic and fulvic acids of a toposequence of alpine soils in the northern Caucasus

  Mikhail I. Makarov;T. I. Malysheva;Ludwig Haumaier;Helmut G. Alt

  100
  Citations

• Reactions of Cp2M(PMe3)2 complexes (M = Ti, Zr) with acetylenes. Selective formation of trans-polyacetylene at low temperatures

  Helmut G. Alt;Heidi E. Engelhardt;Marvin D. Rausch;Lawrence B. Kool

  95
  Citations

• C1-verbrückte Fluorenyliden–Indenylidenkomplexe des Typs (C13H8–CR2–C9H6−nR′n)ZrCl2 (n=0, 1; R=Me, Ph, Butenyl; R′=Alkyl, Alkenyl) als Metallocenkatalysatorvorstufen für die Ethylenpolymerisation

  Helmut G. Alt;Michael Jung;Gerald Kehr

  94
  Citations

• Syndiospezifische polymerisation von propylen: 2- und 2,7-substituierte metallocenkomplex des typs (C13H8−nRnCR′2C5H4)MCl2 (n = 1,2; R alkoxy, alkyl, aryl, hal; R′ Me, Ph; M Zr, Hf)

  Helmut G. Alt;Roland Zenk

  92
  Citations

• C1-Bridged fluorenylidene cyclopentadienylidene complexes of the type (C13H8–CR1R2–C5H3R)ZrCl2 (R1, R2=alkyl, phenyl, alkenyl; R=H, alkyl, alkenyl, substituted silyl) as catalyst precursors for the polymerization of ethylene and propylene

  Helmut G. Alt;Michael Jung

  92
  Citations

• (α-Diimine)nickel(II) complexes containing chloro substituted ligands as catalyst precursors for the oligomerization and polymerization of ethylene

  Markus Helldörfer;Judith Backhaus;Wolfgang Milius;Helmut G Alt

  89
  Citations