Neue Versuche zur Darstellung von Titanäthyl

Paternò, E.; Peratoner, A.

doi:10.1002/cber.188902201106

Cited by 9 publications

(3 citation statements)

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“…1. Titanium After nearljr a century of fruitless efforts by many workers (10,13,14,35,42,99,106,124,129,135, 144) Herman and Nelson (70,71) succeeded in isolating and characterizing a compound containing a titanium-carbon bond. Shortly thereafter, Summers and Uloth (149) reported the preparation of a second highly interesting type of organotitanium compound.…”

Section: B Group IV Metalsmentioning

confidence: 99%

Alkyls And Aryls of Transition Metals

Cotton¹

1955

Chem. Rev.

116

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Section: B Group IV Metalsmentioning

confidence: 99%

Alkyls And Aryls of Transition Metals

Cotton¹

1955

Chem. Rev.

116

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“…of ether. No reaction appeared to take place after refluxing the mixture for 4 hours, and hydrolysis yielded 75% of the acetomesitylene.…”

Section: Zirconiummentioning

confidence: 99%

ORGANOMETALLIC COMPOUNDS OF TITANIUM, ZIRCONIUM, AND LANTHANUM¹

Gilman¹,

Jones²

1945

J. Org. Chem.

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“…Many further attempts were also unsuccessful (1,2,4,7,(10)(11)(12)(13)(14)16)· Under some circumstances, organotitanium products of a transi tory nature may have been formed in solution, especially in the reactions of titanium 265 salts with various organometallic reagents (7,13). A successful synthesis was reported in 1952 and 1953 by Herman and Nelson (8).…”

mentioning

confidence: 98%

Formation of Alkyl and Aryl Titanium-Carbon Bond Compounds

Herman¹

1959

Metal-Organic Compounds

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The first compound synthesized and isolated, contain ing a titanium-carbon bond was phenyltitanium triisopropoxide. Much information was accumulated related to the preparation and properties of organotitanium compounds of the type R n TiX 4-n , where R could be alkyl or aryl groups and X could be alkoxy groups or halogen. The organotitanium compounds can exist at various valence levels. Compounds of the type R n TiX m can exist when the sum of n and m is 2 or 3. These materials, although more stable than quadrivalent organotitanium compounds, exhibit some thermal instability and act as catalysts for polymerization. Reduction of titanium com pounds by organometallic reagents takes place through the intermediate formation of an organo titanium compound. Reduction proceeds only to the extent of giving a mixture of bi-and trivalent compounds even in the presence of excess Grignard reagent. Reaction of the lower valent titanium com pounds with the solvent may account for this.Alkyl and aryl organometallic compounds containing direct carbon to titanium bonds are discussed. These carbon-metal bonds are of at least partial covalent character. New work is described which further elucidates the nature of the organotitanium com pounds formed on reaction of organometallic reagents with titanium esters or chlorides at varying molar ratios. Conclusions or proposed structures are based upon diagnostic tests and chemical analyses similar to those by Herman and Nelson (8).Although most of the compounds described are diffcult to handle and even more difficult to isolate in purified state, they are increasingly important as catalysts in heterogeneous polymerization. This field has grown rapidly since Ziegler's announce ment (18) of the low pressure polymerization of ethylene by means of catalysts formed by the interaction of organometallic reagents, such as org a no aluminum compounds, with various derivatives of titanium.The initial attempt to prepare a stable and isolatable organotitanium compound was made in 1861 by Cahours (3). Many further attempts were also unsuccessful (1,2,4,7,(10)(11)(12)(13)(14)16)· Under some circumstances, organotitanium products of a transi tory nature may have been formed in solution, especially in the reactions of titanium 265Downloaded by MICHIGAN STATE UNIV on February 18, 2015 |

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Neue Versuche zur Darstellung von Titanäthyl

Cited by 9 publications

References 0 publications

Alkyls And Aryls of Transition Metals

Alkyls And Aryls of Transition Metals

ORGANOMETALLIC COMPOUNDS OF TITANIUM, ZIRCONIUM, AND LANTHANUM¹

Formation of Alkyl and Aryl Titanium-Carbon Bond Compounds

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Neue Versuche zur Darstellung von Titanäthyl

Cited by 9 publications

References 0 publications

Alkyls And Aryls of Transition Metals

Alkyls And Aryls of Transition Metals

ORGANOMETALLIC COMPOUNDS OF TITANIUM, ZIRCONIUM, AND LANTHANUM1

Formation of Alkyl and Aryl Titanium-Carbon Bond Compounds

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ORGANOMETALLIC COMPOUNDS OF TITANIUM, ZIRCONIUM, AND LANTHANUM¹