Reductive Activation of Tripod Cobalt Compounds: Oxidative Addition of H−H, P−H, and Sn−H Functions

Winterhalter, Ute; Zsolnai, László; Kircher, Peter; Heinze, Katja; Hüttner, Gottfried

doi:10.1002/1099-0682(20011)2001:1<89::aid-ejic89>3.0.co;2-2

Cited by 25 publications

(30 citation statements)

References 32 publications

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“…4 had been fully characterised by standard analytical techniques 5. The solid‐state structure of 4 6 referred to in this work (Table 1) was found to be analogous to that of 3 in all comparable details.…”

Section: Resultsmentioning

confidence: 72%

“…THF solutions of the species described as [“ tripod Co 0 ”] ( A ) were prepared as reported 5. From these solutions [ tripod Co(H) 2 (SnBu 3 )] ( 4 ) was obtained following the published procedures (Scheme ) 5…”

Section: Resultsmentioning

confidence: 99%

“…It has been reported that reduction of a solution of [ tripod CoCl 2 ] ( 1 )4 (Scheme ) in THF by potassium graphitate, KC 8 , in an atmosphere of argon leads to a compound which behaves as expected for the species [“ tripod Co 0 ”] ( A ): with HSnPh 3 it reacts to produce [ tripod Co(SnPh 3 )] ( 2 ), which, under an atmosphere of H 2 yields the cobalt(III) species [ tripod Co(H) 2 (SnPh 3 )] ( 3 ) 5. If HSnBu 3 is used instead of HSnPh 3 , [ tripod Co(H) 2 (SnBu 3 )] ( 4 ), an analogue of 3 , is immediately obtained 5…”

Section: Introductionmentioning

confidence: 99%

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Reductive Activation of tripod Metal Compounds: Identification of Intermediates and Preparative Application

et al. 2008

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)] (E = Si, R = Ph; E = Sn, R = Ph, Bu) are rather similar. While they contain six-coordinate cobalt with the formal oxidation state of cobalt being +III the coordination geometry is not octahedral: the heteroelement E deviates from the position which it would have in octahedral coordination by around 40°while the other five ligands, three phosphorus and two hydrogen, have the expected interligand angles of around 90°and 180°, respectively. The deviation of the heteroelement E is such that it approaches the

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Section: Resultsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reductive Activation of tripod Metal Compounds: Identification of Intermediates and Preparative Application

et al. 2008

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“…The scope of the catalytic system was extended to different secondary and tertiary phosphanes, including aromatic, aliphatic and vinylic substrates as well as diphosphanes (Table , entries 2–8). Interestingly, the clean conversion of the aliphatic and highly flammable secondary phosphanes such as diphenylphosphane (entry 3) and di‐ tert ‐butylphosphane (entry 4) to their corresponding oxides is observed without affecting the P−H bond as indicated by both 31 P{ 1 H} NMR ( 1 J PH =475 Hz and 1 J PH =426 Hz, respectively) and HR‐MS (see the SI) . While di‐phenylphosphane can be selectively oxidized with tert ‐butyl peroxide, to date, no records have been found in the literature for the direct oxidation of ( t Bu) 2 PH to (O)PH( t Bu) 2 .…”

Section: Methodsmentioning

confidence: 99%

Zero‐Valent Amino‐Olefin Cobalt Complexes as Catalysts for Oxygen Atom Transfer Reactions from Nitrous Oxide

Gianetti,

Rodríguez‐Lugo,

Harmer

et al. 2016

Angew Chem Int Ed

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The synthesis and characterization of several zero-valent cobalt complexes with a bis(olefin)-amino ligand is presented. Some of these complexes proved to be efficient catalysts for the selective oxidation of secondary and allylic phosphanes, as well as diphosphanes, even with a direct P-P bond. With 5 mol % catalyst loadings the oxidations proceed under mild conditions (25-70 °C, 7-22 h, 2 bar N O) and afford good to excellent yields (65-98 %). In this process, the greenhouse gas N O is catalytically converted into benign N and added-value organophosphorus compounds, some of which are difficult to obtain otherwise.

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“…The following species [68], obtained and characterized in the solid-state by crystallographic studies (Fig. 21).…”

Section: Group Ixb -Co Rh Irmentioning

confidence: 99%

Polydentate phosphines

Pascariu¹,

Iliescu²,

Popa³

et al. 2009

Journal of Organometallic Chemistry

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a b s t r a c tPhosphines are one of the most important classes of ligands in chemistry, in both the industrial and academic spheres. This review deals with the design and properties of polydentate phosphines, an original and broad class of multidentate ligands. The multidentate nature of these species has led to special properties, in which the spatial proximity of phosphorus atoms is crucial. The first part gives an overview of oligodentates polyphosphines in which is discussed the types and the basic routes for their synthesis. The review continues with the most important synthetic routes for obtaining complexes. Because of huge amount of literature data this review is not exhaustive, but it collects the most relevant findings in this area. The restriction to structural and spectroscopic properties allows us for a well organized handling of the complex material.

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Reductive Activation of Tripod Cobalt Compounds: Oxidative Addition of H−H, P−H, and Sn−H Functions

Cited by 25 publications

References 32 publications

Reductive Activation of tripod Metal Compounds: Identification of Intermediates and Preparative Application

Reductive Activation of tripod Metal Compounds: Identification of Intermediates and Preparative Application

Zero‐Valent Amino‐Olefin Cobalt Complexes as Catalysts for Oxygen Atom Transfer Reactions from Nitrous Oxide

Polydentate phosphines

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