Übergangsmetall-Carben-Komplexe, CXXXI. Umsetzung von [(CO)5WCNEt2]BF4 mit anionischen Organylverbindungen von Elementen der V. Hauptgruppe/ Transition Metal Carbene Complexes, CXXXI. Reaction of [(CO)sWCNEt2]BF4 with Anionic Organyl Compounds of Group V Elements

1983 ◽  
Vol 38 (5) ◽  
pp. 582-586 ◽  
Author(s):  
Ernst Otto Fischer ◽  
Rudolf Reitmeier
Keyword(s):  
Transition Metal ◽  
Nucleophilic Addition ◽  
Spectroscopic Data ◽  
The Novel ◽  
Reaction Conditions ◽  
Group V ◽  
Carbene Complexes ◽  
Carbene Complex ◽  
Reductive Dimerization ◽  
New Compounds

AbstractThe cationic carbyne complex [(CO)5WCNEt2]BF4 (1) reacts with potassiumdiphenylamide, KNPh2, with nucleophilic addition of the amide anion to give (CO)5W[C(NEt2)NPh2] (2). The corresponding reactions with KPPh2, KPEt2, KPMePh, NaSbPh2 and NaBiPh2 yield the complex [(CO)5W(CNEt2)]2 (3), which is formed by reductive dimerization of two carbyne fragments. In case of KPMePh the carbene complexes (CO)5W[C(NEt2)PMePh (4) and trans-(MePhPH)(CO)4W[C(NEt2)PMePh] (5) are also obtained. On warming in solution 5 spontaneously rearranges to the novel cyclic carbene complex (6). Reaction conditions, properties and spectroscopic data of the new compounds are reported.

scholarly journals Übergangsmetall-Carben-Komplexe, CXXXIV [1]. Synthese neuer Mono- und Biscarben-Komplexe der VI. Nebengruppe; Röntgenstruktur des ersten Bis[amino(alkoxy)carben]-Komplexes / Transition Metal Carbene Complexes, CXXXIV [1]. Synthesis of New Mono- and Bis-Carbene Complexes of Group VIb Elements; Structure of the First Bis[amino(alkoxy)carbene]-Complex

1984 ◽  
Vol 39 (5) ◽  
pp. 668-674 ◽  
Author(s):  
Ernst Otto Fischer ◽  
Rudolf Reitmeier ◽  
Klaus Ackermann
Keyword(s):  
Molecular Structure ◽  
Transition Metal ◽  
Spectroscopic Data ◽  
The Novel ◽  
Nucleophilic Agent ◽  
Reaction Conditions ◽  
Carbene Complexes ◽  
X Ray ◽  
X Ray Crystallography ◽  
New Compounds

The hexacarbonyl compounds of chromium, molybdenum and tungsten react with the highly nucleophilic agent Li NiPr2 and in a subsequent alkylation with (Et3O)BF4 to give the carbene complexes (CO)5M[C(N′Pr2)OEt] (1, 3, 4). In case of W(CO)6 and Mo(CO)6 the novel biscarbene complexes cis(CO)4M[C(NiPr2)OEt]2 (2, 5) are additionally obtained. Reaction conditions, properties and spectroscopic data of the new compounds are reported. The molecular structure of cis(CO)4W[C(NiPr2)OEt]2 (4) was determined by X-ray crystallography

Übergangsmetall-Carben-Komplexe, CXXIII [1] Dicarbenoktacarbonyldirhenium-Komplexe / Transition Metal Carbene Complexes, CXXIII [1] Dicarbeneoctacarbonyldirhenium Complexes

1982 ◽  
Vol 37 (5) ◽  
pp. 627-630 ◽  
Author(s):  
Ernst Otto Fischer ◽  
Paul Rustemeyer
Keyword(s):  
Transition Metal ◽  
Spectroscopic Data ◽  
Reaction Conditions ◽  
Carbene Complexes ◽  
New Compounds

The reaction of Re2(CO)10 with LiSi(C6H5)3 and subsequent alkylation by (C2H5)3OBF4 yields not only (CO)9Re2C(OC2H5)Si(C6H5)3 but also Re1-ax,Re2-eq-[C(OC2H5)Si(C6H5)3]2(CO)8Re2 (1). The analogous isomeric complexes Re1-ax-[C(OC2H5)C6H4CH3]-Re2-eq-[C(OC2H5)Si(C6H5)3](CO)8Re2 (2) and Re1-ax-[C(OC2H5)Si(C6H5)3]-Re2-eq-[C(OC2H5)C6H4CH3](CO)8Re2 (3) are obtained by treatment of eq- or ax-(CO)9Re2C(OC2H5)Si(C6H5)3 with LiC6H4CH3 and subsequent alkylation by (C2H5)3OBF4. Reaction conditions, and properties and spectroscopic data of the new compounds are reported

Übergangsmetall-Carben-Komplexe, CXXXIII [1] Darstellung, spektroskopische Daten und Molekülstrukturen neuartiger Eisencarben-Komplexe/Transition Metal Carbene Complexes, CXXXIII [1] Preparation, Spectroscopic Data and Molecular Structures of Novel Iron Carbene Complexes

1984 ◽  
Vol 39 (4) ◽  
pp. 468-473 ◽  
Author(s):  
Ernst Otto Fischer ◽  
Johannes Schneider ◽  
Klaus Ackermann
Keyword(s):  
Transition Metal ◽  
Spectroscopic Data ◽  
Subsequent Treatment ◽  
Molecular Structures ◽  
Carbene Complexes ◽  
Carbene Complex

The reaction of Fe(CO)5 with LiNiPr2 and subsequent treatment with Et3OBF4 results in the formation of (CO)4 Fe[C(NiPr2)OC2H5] (1). As a second product the cyclic carbene complex (2) is formed.

Übergangsmetall-Carbin-Komplexe, LX [1]. Neue Triphenylsilyl-Carben-Komplexe des Rheniums durch Umsetzung eines kationischen Carbinkomplexes mit Nucleophilen / Transition Metal Carbyne Complexes, LX [1] Novel Triphenylsilyl Carbene Complexes of Rhenium by Reaction of a Cationic Carbyne Complex with Nucleophiles

1980 ◽  
Vol 35 (9) ◽  
pp. 1083-1087 ◽  
Author(s):  
Ernst Otto Fischer ◽  
Paul Rustemeyer ◽  
Dietmar Neugebauer
Keyword(s):  
Transition Metal ◽  
Structure Determination ◽  
Spectroscopic Data ◽  
Reaction Conditions ◽  
Carbene Complexes ◽  
X Ray ◽  
Compound C ◽  
Carbyne Complexes

The reaction between C5H5Re(CO)3 and LiSi(C6H5)3 affords the compound C5H5(CO)2ReC(OCH3)Si(C6H5)3 after subsequent alkylation with CH3SO3F. This complex reacts with BF3 to yield [C5H5(CO)2ReCSi(C6H5)3]BF4. This cationic carbyne complex yields C5H5(CO)2ReC(CH1)Si(C6H5)3 with LiCH3 and C5H5(CO)2ReC(H)Si(C6H5)3 with (C4H9)4NBH4. Reaction conditions, properties and spectroscopic data of the new com­pounds as well as an X-ray structure determination of C5H5(CO)2ReC(H)Si(C6H5)3 are reported.

Synthesis of the Novel Thienopyrimidine-Based S-Glycoside Analogues via Nucleophilic Addition/Cyclization/Glycosylation Reactions

2013 ◽  
Vol 781-784 ◽  
pp. 999-1002
Author(s):  
Qiu Hong Dai ◽  
Kun Zou ◽  
Ming Guo Liu ◽  
Lin Luo ◽  
Nian Yu Huang
Keyword(s):  
Elemental Analysis ◽  
Nucleophilic Addition ◽  
The Novel ◽  
Reaction Conditions ◽  
Biological Screening ◽  
Structural Motifs ◽  
Efficient Approach

The title compounds thienopyrimidine-basedS-glycoside analogues were synthesized through the nucleophilic addition/cyclization/glycosylation reactions in good yields from easily accessible starting materials under mild reaction conditions. All of compounds were characterized by NMR, MS, IR and elemental analysis. The efficient approach allowed the facial synthesis of small libraries of thienopyrimidine-basedS-glycoside analogues with different structural motifs for biological screening.

Übergangsmetall-Carbin-Komplexe, LXXII [1]. Reaktionen von trans-Bromotetracarbonyl(phenylcarbin)chrom mit Lithiumthiokresolat und Lithiumselenophenolat / Transition Metal Carbyne Complexes, LXXII [1]. Reactions of trans-Bromotetracarbonyl(phenylcarbyne)chromium with Lithium Thiocresolate and Lithium Phenylselenolate

1982 ◽  
Vol 37 (10) ◽  
pp. 1274-1278 ◽  
Author(s):  
Werner Roll ◽  
Ernst Otto Fischer ◽  
Dietmar Neugebauer ◽  
Ulrich Schubert
Keyword(s):  
Hydrochloric Acid ◽  
Transition Metal ◽  
Structure Determination ◽  
Binuclear Complex ◽  
Spectroscopic Data ◽  
Reaction Conditions ◽  
X Ray ◽  
Carbyne Complexes ◽  
Ether Complex

The reaction of trans-bromotetracarbonyl(phenylcarbyne)chromium (1) with lithium phenylselenolate and subsequent protonation with aqueous hydrochloric acid leads to (CO)5Cr[Se2(C6H5)2] (3) and (CO)4Cr(μ-SeC6H5)2Cr(CO)4 (4). From 1 and lithium 4-methylphenylthiolate (CO)5CrC(C6H5)SC6H4CH3 (5) and (CO)5CrS(C2H5)(4-CH3C6H4) (6) are obtained, if triethyloxonium tetrafluoroborate is used instead of hydrochloric acid. The analoguous reaction of 1 with lithium phenylselenolate yields the seleno ether complex (7). Reaction conditions, properties, spectroscopic data and the results of an X-ray structure determination of the binuclear complex (4) are reported.

Übergangsmetallketen-Verbindungen, XII [1] Darstellung und Struktur von η5-C5H5(CO)2 [P(CH3)3]W-C≡C-C3H5 / Compounds of Transition Metal Ketenes, XII [1] Synthesis and Structure of η5-C5H5(CO)2 [P(CH3)3]W-C≡C-C3H5

1983 ◽  
Vol 38 (1) ◽  
pp. 67-70 ◽  
Author(s):  
Werner Sieber ◽  
Mathias Wolfgruber ◽  
Dietmar Neugebauer ◽  
Olli Orama ◽  
Fritz R. Kreißl
Keyword(s):  
Carbon Monoxide ◽  
Transition Metal ◽  
Spectroscopic Data ◽  
Reaction Conditions ◽  
X Ray ◽  
Acetylene Compound

Abstract Dicarbonyl(η5-cyclopentadienyl)(η1 -cyclopropylketenyl)(trimethylphosphane)tungsten reacts with carbon monoxide under reduction of the ketene moiety forming a (σ-bonded acetylene compound. Reaction conditions, spectroscopic data and the X-ray structure of the new compound are reported.

scholarly journals Übergangsmetallketen-Verbindungen, XXYI[1] Darstellung und Struktur eines Dekaboran(14)oxyalkin-Komplexes / Compounds of Transition Metal Ketenes, XXVI[1] Synthesis and Structure of a Decaboran(14)oxyalkyne Complex

1985 ◽  
Vol 40 (11) ◽  
pp. 1500-1503 ◽  
Author(s):  
Werner J. Sieber ◽  
Dietmar Neugebauer ◽  
Fritz R. Kreißl
Keyword(s):  
Transition Metal ◽  
Spectroscopic Data ◽  
Complex Reaction ◽  
Reaction Conditions ◽  
X Ray

Carbonyl(η5-cyclopentadienyl)(η2-4-methylphenylketenyl)trimethylphosphinetungsten reacts with decaborane(14) under conversion of the η2-ketenyl into a η2-alkyne complex. Reaction conditions, spectroscopic data and the X-ray structure of the new compound are reported.

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