General method for stereoselective coupling of an alkyl, aryl, or vinyl group with a vinylidene unit at a transition-metal center

1993 ◽  
Vol 115 (21) ◽  
pp. 9864-9865 ◽  
Author(s):  
Ralf Wiedemann ◽  
Paul Steinert ◽  
Martin Schaefer ◽  
Helmut Werner
Keyword(s):  
Transition Metal ◽  
Metal Center ◽  
Alkyl Aryl ◽  
Vinyl Group ◽  
General Method

Some Problems in the Oxidative Addition and Binding of an Ethylene to a Transition Metal Center.

1987 ◽  
Vol 6 (4) ◽  
pp. 902-902
Author(s):  
Jerome Silestre ◽  
Maria Calhorda ◽  
Roald Hoffman ◽  
Page Stoutland ◽  
Robert Bergman
Keyword(s):  
Transition Metal ◽  
Oxidative Addition ◽  
Metal Center

A general method towards transition metal monoboride nanopowders

2017 ◽  
Vol 108 (4) ◽  
pp. 335-338 ◽  
Author(s):  
Weixiao Cao ◽  
Ya'nan Wei ◽  
Xin Meng ◽  
Yuexia Ji ◽  
Songlin Ran
Keyword(s):  
Transition Metal ◽  
General Method

The First Coordination of an (α-Diazo)phosphine to a Transition-Metal Center

2003 ◽  
Vol 22 (7) ◽  
pp. 1358-1360 ◽  
Author(s):  
Emmanuelle Despagnet-Ayoub ◽  
Heinz Gornitzka ◽  
John Fawcett ◽  
Philip W. Dyer ◽  
Didier Bourissou ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Center

Transition-Metal-Catalyzed Transformation of Sulfonates via S–O Bond Cleavage: Synthesis of Alkyl Aryl Ether and Diaryl Ether

2019 ◽  
Vol 21 (22) ◽  
pp. 8879-8883 ◽  
Author(s):  
Xuemeng Chen ◽  
Xue Xiao ◽  
Haotian Sun ◽  
Yue Li ◽  
Haolin Cao ◽  
...  
Keyword(s):  
Transition Metal ◽  
Bond Cleavage ◽  
Aryl Ether ◽  
Alkyl Aryl ◽  
Diaryl Ether ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

scholarly journals Metallacarboranes: New synthetic strategies and structural patterns

2006 ◽  
Vol 78 (7) ◽  
pp. 1333-1340 ◽  
Author(s):  
Narayan S. Hosmane ◽  
John A. Maguire
Keyword(s):  
Transition Metal ◽  
Systematic Study ◽  
Metal Salts ◽  
Late Transition Metal ◽  
Structural Patterns ◽  
Transition Metal Salts ◽  
Late Transition ◽  
Synthesis Reactions ◽  
Oxide Ion ◽  
General Method

A summary of the latest results in the authors' laboratories covering three areas is presented. The results of the controlled syntheses of oxide ion encapsulating lanthanacarboranes, by the introduction of stoichiometric amounts of H2O in the synthesis reactions, and the strictures of the resulting compounds were discussed. The scope and limitations of a general method for the synthesis of the open pentadienyl complexes were presented. In addition, the results of a systematic study of the reactions of the [2,n-(SiMe3)2-nido-2,n-C2B4H4]2- (n = 3, 4) with the late transition-metal salts MCl2 (M = Fe, Co, Ni) were discussed.

Übergangsmetallkomplexe mit Schwefelliganden, LXV. Diastereospezifische Alkylierung von [Mo(NO)2(′S2′)2]2- zu chiralen [Mo(NO)2(′RS4')]-Komplexen mit chirotopen und prostereogenen Mo-Zentren / Transition Metal Complexes with Sulfur Ligands, LXV. Diastereospecific Alkylation of [Mo(NO)2(′S2')2]2- to Chiral [Mo(NO)2(′RS4')] Complexes with Chirotopic and Prostereogenic Mo-Centers

1991 ◽  
Vol 46 (10) ◽  
pp. 1343-1348 ◽  
Author(s):  
Dieter Sellmann ◽  
Franz Grasser ◽  
Falk Knoch ◽  
Matthias Moll
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Parent Compound ◽  
Metal Center ◽  
Chiral Complexes ◽  
Metal Centers ◽  
Electronic Character

In order to investigate how chirotopicity and stereogenicity of metal centers influence the enantioselectivity of metal centered reactions the stereogenic properties of metal centers in chiral complexes have to be varied without changing their electronic character. Diastereospecific alkylation of [Mo(NO)2(′S2′ )2]2- by racemic 1,2-dibromopropane and 1,2-dibromobutane yields the title complexes [Mo(NO)2(′MeS4′ )] and [Mo(NO)2(′EtS4′)] that differ from the parent compound [Mo(NO)2('S4′)] with respect to the stereogenicity of the metal center and allow future investigations of the question raised above.

Cationic rhodium(I) sulfoxide complexes. Synthesis and spectroscopic properties

1977 ◽  
Vol 55 (12) ◽  
pp. 2353-2359 ◽  
Author(s):  
Brian R. James ◽  
Robert H. Morris ◽  
Kenneth J. Reimer
Keyword(s):  
Transition Metal ◽  
Frequency Shift ◽  
Spectroscopic Properties ◽  
Alkyl Aryl ◽  
H Nmr ◽  
Methyl Sulfoxide ◽  
Solid Compounds ◽  
Oxygen Bond ◽  
Infrared Data ◽  
Methyl Phenyl

Displacement of the labile acetone ligand from [Rh(diene)(PPh3)(acetone)]A (diene = 1,5-cyclooctadiene (COD), norbornadiene (NBD); A = PF6−, SbF6−) allows facile coordination of dialkyl or alkyl aryl sulfoxides, and [Rh(diene)(PPh3)(sulfoxide)]+ complexes have been synthesized using dimethyl sulfoxide (DMSO), tetramethylene sulfoxide (TMSO), di-n-propyl sulfoxide (NPSO), (S,S;S,R)-(+)-2-methylbutyl methyl sulfoxide (MBMSO), methyl phenyl sulfoxide (MPSO), (R)-(+)-methyl-p-tolyl sulfoxide (MPTSO), and (R)-t-butyl p-tolyl sulfoxide (TBPTSO).Diaryl sulfoxides appear to coordinate in solution but no solid compounds could be isolated. The upfield shifts of the sulfoxide resonances (1H nmr), reflecting shielding by the adjacent phenyl groups of PPh3, and the decrease in ν(SO) on coordination, are indicative of O-bonding in all cases. Infrared data indicate that the frequency shift of ν(SO) upon O-coordination is roughly proportional to the strength of the metal–oxygen bond for a range of transition metal DMSO and TMSO complexes.

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