Transition-metal sulfur ylide complexes. 23. Methylene transfer from sulfur ylides to transition-metal complexes: a parallel between sulfur ylides and diazomethane to organometallic chemistry

1986 ◽  
Vol 5 (10) ◽  
pp. 2114-2116 ◽  
Author(s):  
Lothar. Weber ◽  
Ewald. Luecke
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Organometallic Chemistry ◽  
Transition Metal Complexes ◽  
Sulfur Ylides ◽  
Sulfur Ylide ◽  
Ylide Complexes

Übergangsmetall-Schwefelylid-Komplexe, XXII [1] Zur Reaktivität von DicarbonylnitrosyI-η5-thiacyclohexadienyl-1-oxid- Chromkomplexen gegenüber Phosphor- und Schwefelyliden / Transition Metal Sulfur Ylide Complexes, XXII [1] Reactivity Studies of Dicarbonylnitrosyl-η5-thiacyclohexadienyl-1-oxide Chromium Complexes with Phosphorus and Sulfur Ylides

1985 ◽  
Vol 40 (3) ◽  
pp. 373-379 ◽  
Author(s):  
Lothar Weber
Keyword(s):  
Transition Metal ◽  
Chromium Complexes ◽  
Carbonyl Ligand ◽  
Sulfur Ylides ◽  
Sulfur Ylide ◽  
Ylide Complexes

3a-dη5-Thiacyclohexadienyl-1-oxide chromium complexes are generated by treatment of the 1-methyl-thiabenzene-1-oxide complexes 1a-d with Li[BHEt3] and successive nitrosylation of the intermediates 2a-d. 3a-d react with Me2S(O) = CH2 or Ph3P=CH2 at a carbonyl ligand in an additon/transylidation process to yield the very sensitive products 5, 6a-d.

Some Organometallic Chemistry of Tetracyanoethene: CN-displacement and Cycloaddition Reactions with Alkynyl - Transition Metal Complexes and Related Chemistry

2011 ◽  
Vol 64 (1) ◽  
pp. 77 ◽  
Author(s):  
Michael I. Bruce
Keyword(s):  
Optical Properties ◽  
Transition Metal ◽  
Metal Complexes ◽  
Organometallic Chemistry ◽  
Transition Metal Complexes ◽  
Ring Opening ◽  
Metal Centre ◽  
Weakly Bound ◽  
Electronic And Optical Properties ◽  
Electrocyclic Reactions

The highly electron-deficient cyanocarbons tetracyanoethene (tcne) and, to a lesser extent, tetracyanoquinodimethane (tcnq), display a fascinating chemistry with transition metal substrates. In particular, the [2 + 2]-cycloadditions of the cyanocarbons with alkynyl- or poly-ynyl–metal complexes have been extensively studied by the author’s group. These reactions proceed via polar adducts to give σ-cyclobutenyl complexes, which then undergo facile ring-opening (retro-electrocyclic) reactions to form the corresponding butadienyl derivatives. In some cases, further reactions can occur by displacement of weakly bound ligands from the metal centre. The subsequent chemistry of these derivatives has been only cursorily investigated, while related studies of organic analogues have produced molecules with interesting electronic and optical properties.

scholarly journals Syntheses and Characterization of the First Cycloheptatrienyl Transition-Metal Complexes with a M-CF3 Bond

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6838
Author(s):  
Christos Lampropoulos ◽  
Gabriel Rashad ◽  
Chris Douvris
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Organometallic Chemistry ◽  
Transition Metal Complexes ◽  
Thermal Instability ◽  
Synthesis And Characterization ◽  
Metal Chemistry ◽  
Cyclopentadienyl Ligands ◽  
Considerable Depth

The organometallic chemistry of metal complexes with organocyclic ligands of higher than five hapticity is much more lacking than the chemistry of metal complexes with η5-cyclopentadienyl ligands, which has been explored in considerable depth, resulting in novel advances. The main reason for this is stability. In particular, reports indicate that (η7-C7H7)MLn complexes are considerably less stable than analogous (η5-C5H5)MLn. In perfluoroalkyl metal chemistry, there is currently no reported (η7-C7H7)MLn derivative, whereas a number of alkylated ones are known and important conclusions have been drawn about their stability. Responding to this void, and using Morrison’s trifluoromethylating reagent, the present study reports the synthesis and characterization of the first cycloheptatrienyl molybdenum complexes bearing the trifluoromethyl moiety; (η7-C7H7)Mo(CO)2CF3 (I), and (η7-C7H7)Mo(CO)(PMe3)CF3 (II) and discusses their low thermal instability.

Organometallic chemistry. Past, present, and future

2001 ◽  
Vol 73 (2) ◽  
pp. 205-208 ◽  
Author(s):  
Akio Yamamoto
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Organometallic Chemistry ◽  
Transition Metal Complexes ◽  
Half Century ◽  
The Past ◽  
Past Half Century ◽  
Further Development ◽  
Past Half ◽  
Personal Viewpoint

Development of organometallic chemistry in the past half century is reviewed from the author's personal viewpoint with focus on the establishment of fundamental concepts relevant to catalysis. Further development in the coming century is expected in view of the diversity of transition-metal complexes and their unique properties.

Sign in / Sign up

Export Citation Format

Share Document