ChemInform Abstract: DURCH UMSETZUNG MIT TERT.-BUTYL-LITHIUM IN BENZOL ERHAELTLICHE OLIGOMERE DES 2,4-DIMETHYL-PENTADIENS-(1,3) UND DES TRANS-PENTADIENS-(1,3)

1974 ◽  
Vol 5 (7) ◽  
pp. no-no
Author(s):  
ANNIE ULRICH
Keyword(s):  
Butyl Lithium ◽  
Tert Butyl

ChemInform Abstract: KREUZASSOZIATION VON TERT.-BUTYL-LITHIUM, KINETIK DER DISSOZIATION VON TERT.-BUTYL-LITHIUM

1970 ◽  
Vol 1 (23) ◽  
pp. no-no
Author(s):  
MARCETTA Y. DARENSBOURG ◽  
BERT Y. KIMURA ◽  
GEORGE E. HARTWELL ◽  
THEODORE L. BROWN
Keyword(s):  
Butyl Lithium ◽  
Tert Butyl

Reaktionen von Dicarbonyl (η-cyclopentadienyl)(propiolsäuremethylester)niangan(I) mit Basen. Isolierung von Vinyliden- und Carbenkomplexen / Reactions of Dicarbonyl(η-cyclopentadienyl)(methylpropiolate)manganese(I) with Bases The Isolation of Vinylidene and Carbene Complexes

1980 ◽  
Vol 35 (1) ◽  
pp. 86-90 ◽  
Author(s):  
Heinz Berke
Keyword(s):  
General Type ◽  
Carbene Complexes ◽  
Butyl Lithium ◽  
Tert Butyl ◽  
Vinylidene Complexes ◽  
Subsequent Addition

Abstract Reaction of dicarbonyl(η-cyclopentadienyl)(methylpropiolate)manganese(I) with various stoichiometric quantities of tert-butyl lithium and subsequent addition of HCl or CH3OSO2F allows the isolation of vinylidene complexes of the general type CpMn(CO)2=C=CR1R2 R1=H, CH3; R2 = COOCH3, COt-Bu, COH(t-Bu)2). The compound with R1=H, R2=COOCH3 adds another CpMn(CO)2 fragment, with formation of a bridged vinylidene species with a Cp2Mn2(CO)4 unit. The reaction with amide or methoxide leads to the formation of carbene complexes CpMn(CO)2 = C(R1)CH2-COOCH3 (Rx = NH2, OCH3).

Metallorganische Verbindungen der Lanthanoide, XXXIII [1] Dicyclopentadienyllanthanoid-alkyle und -hydride von Neodym, Samarium und Lutetium [2] / Organometallic Compounds of the Lanthanides, XXXIII [1] Dicyclopentadienyllanthanide Alkyls and Hydrides of Neodymium, Samarium and Lutetium [2]

1985 ◽  
Vol 40 (11) ◽  
pp. 1490-1494 ◽  
Author(s):  
Herbert Schumann ◽  
Gerald Jeske
Keyword(s):  
Organometallic Compounds ◽  
Butyl Lithium ◽  
Hydride Complexes ◽  
Tert Butyl

Tricyclopentadienylneodymium and -lutetium react with sec-butyl lithium and terf-butyl lithium to form sec-butyl- and tert-butyl(dicyclopentadienyl)neodymium and -lutetium, which decompose to the corresponding dicyclopentadienyllanthanide hydride complexes. Dicyclopentadienyl-bis-(trimethylsilyl)methylsamarium and -lutetium are made from dicyclopentadienylsamarium or -lutetium chloride and bis(trimethylsilyl)methyl lithium. They react with hydrogen to form the corresponding dicyclopentadienyllanthanide hydride complexes.

Ruthenocene mit sterisch anspruchsvollen Cyclopentadienylliganden

2003 ◽  
Vol 58 (6) ◽  
pp. 514-520 ◽  
Author(s):  
Herbert Schumann ◽  
Susanne Stenz ◽  
Stefan H. Mühle
Keyword(s):  
Single Crystal ◽  
Nmr Spectra ◽  
Butyl Lithium ◽  
X Ray ◽  
Tert Butyl ◽  
Tributyltin Chloride ◽  
C Nmr

1-tert-Butyl-2,4-cyclopentadiene (1), 1,3-di(tert-butyl)-2,4-cyclopentadiene (2), 1-ethyl-2,3,4,5- tetramethyl-2,4-cyclopentadiene (3), 1-iso-propyl-2,3,4,5-tetramethyl-2,4-cyclopentadiene (4), 1- tert-butyl-2,3,4,5-tetramethyl-2,4-cyclopentadiene (5), and 1-phenyl-2,3,4,5-tetramethyl-2,4-cyclopentadiene (6) react with n-butyl lithium followed by tributyltin chloride to give the corresponding tributyl(cyclopentadienyl)stannanes Bu3SnCp# 1a to 6a. The reactions of 1a to 6a with Ru(COD)Cl2 result in the formation of the corresponding ruthenocenes RuCp2# 1b to 6b. Ru(C5H3Ph2)2 (7b) is prepared from [Ru(p-cymol)Cl2]2 and Na[C5H3Ph2]. The 1H and 13C NMR spectra of the new stannanes 1a to 6a and the ruthenocenes 1b to 7b as well as the single crystal X-ray structure of 4b are reported and discussed.

Asymmetrische Synthesen durch Substitution: Diastereomere Arsinite aus homochiral substituierten Arsoniten / Asymmetrie Synthesis via Substitution: Diastereomeric Arsinites from Homochirally Substituted Arsonites

1995 ◽  
Vol 50 (3) ◽  
pp. 339-341 ◽  
Author(s):  
Wolf Jürgen Richter
Keyword(s):  
Asymmetric Induction ◽  
Butyl Lithium ◽  
Tert Butyl ◽  
Double Substitution

Conceptually novel access to chiral arsinites is provided by reacting phenyl-O,O-dimenthylarsonite (1) with bulky nucleophiles e. g. tert-butyl-lithium or iso-propyl-lithium to yield the arsinites 3 and 4. The asymmetric induction determined by GC and NMR is 50% and 30% d.e. A small nucleophile effects double substitution.

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