The Polymerization of Acetylene with Dicyclopentadienyl-titanium

Yokokawa, Kaiji; Azuma, Keiichi

doi:10.1246/bcsj.38.859

Cited by 15 publications

(4 citation statements)

References 1 publication

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“…Over the next decade, other synthetic methods such as the hydrogenation of (η 5 -C 5 H 5 ) 2 TiMe 2 and the reduction of (η 5 -C 5 H 5 ) 2 TiCl 2 with sodium naphthalenide or sodium metal were reported to produce titanocene. Also around this time, reports began to appear suggesting that the proposed sandwich structure may not be correct.…”

Section: Bis(cyclopentadienyl)titanium Compounds: “The Titanocenes”mentioning

confidence: 99%

Group 4 Transition Metal Sandwich Complexes: Still Fresh after Almost 60 Years

Chirik

2010

Organometallics

149

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Metal sandwich compounds, more commonly known as metallocenes, are some of the most enduring molecules in organometallic chemistry. Beginning with Wilkinson's quest for titanocene, [(η 5 -C 5 H 5 ) 2 Ti], the synthesis and exploration of the electronic structure and reactivity of group 4 metal sandwich complexes have been an ongoing story for almost six decades. This review recounts the historical origins of group 4 metallocenes and highlights synthetic efforts to observe and stabilize formally d 2 metal sandwich compounds. Specific attention is devoted to recent developments in the field, including dinitrogen coordination by various substituted titanocene derivatives as well as our group's interest in bis(indenyl)zirconium and -hafnium compounds.

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Section: Bis(cyclopentadienyl)titanium Compounds: “The Titanocenes”mentioning

confidence: 99%

Group 4 Transition Metal Sandwich Complexes: Still Fresh after Almost 60 Years

Chirik

2010

Organometallics

149

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“…Journal of the American Chemical Society / 92:21 j October » Given in the table are the monisotopic species with 12C, S5C1, and 48Ti; assignments are based on the polyistopic distribution patterns for each of the ions. 6 Ionizing voltage, 18 ev. c Ionizing voltage, 15 eV.…”

Section: Reaction To ((C5h5)(c6h4)ticl)2mentioning

confidence: 99%

Nature of so-called titanocene, (C10H10Ti)2

Brintzinger¹,

Bercaw²

1970

J. Am. Chem. Soc.

153

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“…Chemical evidence4 suggests that the 3 (6) position of the 1.2-BioC2Hi2 carborane is the most electrophilic BH position on the icosahedral surface. This further suggests, when coupled with the observed value seen at the 3 (6) position, that substitutents placed further away from the carbon atom pair (7, 8, 9, 10, 11, and 12) would be subject to a detectable +1 effect of the icosahedron.…”

Section: Discussionmentioning

confidence: 78%

“…Repeated preparations always resulted in oil formation, as was observed in the initial preparation, but these now could be seeded with previously prepared (CH3)3NH+ compound. The compound was purified by recrystallization from water; e.g., 6.0 g was dissolved in 500 ml of hot water and the insoluble yellowish material remaining was filtered off. The solution was allowed to cool slowly, seeded with a few particles of the crude starting material, and left in the refrigerator overnight.…”

Section: Methodsmentioning

confidence: 99%