Helmut G. Alt

Helmut G. Alt publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Helmut G. Alt sits on this spectrum.

Helmut G. Alt D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Helmut G. Alt sits on this spectrum.

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