Reductions with Potassium Graphitate. I. Preparation of Nickel(0) Complexes of Trialkyl Phosphites.

Jensen, Kim Ebensgaard; Nygaard, Børge; Elisson, G.; Nielsen, Per Halfdan; Sjöberg, Berndt; Larsen, Erik

doi:10.3891/acta.chem.scand.19-0768

Cited by 27 publications

(15 citation statements)

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“…It was concluded that, as a reducing agent, it behaved similarly or poorly compared to its homogeneous analogue sodium naphthalenide, but it had the advantage that it did not form any soluble byproducts. This advantage is particularly important in organometallic chemistry (Jensen et al, 1965;Schwindt et al, 1990;Ungurenasu and Palie, 1975).…”

Section: Reaction Conditions For Reduction Chemistrymentioning

confidence: 99%

Rare Earth Arene-Bridged Complexes Obtained by Reduction of Organometallic Precursors

Huang

Diaconescu

2014

Including Actinides

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Rare earth chemistry has witnessed remarkable advances in recent years. In particular, ancillary ligands other than cyclopentadienyl derivatives have been introduced to the organometallic chemistry and their complexes exhibit distinct reactivity and properties compared to the metallocene or half-sandwiched analogues. The present chapter reviews arene-bridged rare earth complexes with an emphasis on those compounds obtained by reduction reactions. A particular emphasis is placed on rare earth complexes supported by 1,1′-ferrocenediyl diamides since they show the most diverse chemistry with arenes: fused arenes, such as naphthalene and anthracene, formed inverse-sandwiched complexes, in which the arene is dianionic; weakly conjugated arenes, such as biphenyl, p-terphenyl, and 1,3,5-triphenylbenzene, were unexpectedly reduced by four electrons and led to 6-carbon, 10- electron aromatic systems; on the contrary, (E)-stilbene, which has a carbon-carbon double bond between the two phenyl rings, could only be reduced by two electrons, which were located on the carbon-carbon double bond instead of the phenyl rings.

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Section: Reaction Conditions For Reduction Chemistrymentioning

confidence: 99%

Rare Earth Arene-Bridged Complexes Obtained by Reduction of Organometallic Precursors

Huang

Diaconescu

2014

Including Actinides

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“…e conventional procedure is a bottom-up approach for the synthesis of the catalyst complex starting from nickel(II) dibromide and two equivalents of the P-ligand as previously described for the triphenylphosphane complex K2 [17], marked in Scheme 1 as reaction pathway B1. First a Venanzitype complex [NiBr 2 (PR a R b R c ) 2 ] is synthesized (Scheme 1, reaction step B1, and Figure 2 [34][35][36][37][38][39][40]). Complexes of this type containing a tetrahedral nickel centre with two halides and two triphenylphosphane ligands were �rst investigated by Venanzi in 1958 [34].…”

Section: Resultsmentioning

confidence: 99%

“…All [NiBrMes(PR a R b R c ) 2 ] complexes ( Figure 3) are diamagnetic and square-planar, and they can be easily characterized by NMR spectroscopy. 2a [34 ] 3a [35] 4a [36] 5a [37] 6a [38] 7a [39] 8a [39] 9a [40] F 2: Synthesized Venanzi-type complexes.…”

Section: Resultsmentioning

confidence: 99%

Influence of the Steric Demand of Coligands on the Catalytic Activity of Nickel(II) Complexes in the Copolymerization of Ethene and Carbon Monoxide

Lindner

Beckmann

Frank

et al. 2013

ISRN Inorganic Chemistry

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e copolymerization of ethene and carbon monoxide can be catalyzed with square planar arenidotriphenylphosphane nickel(II) complexes containing an N,O-chelate ligand. To examine the in�uence of the phosphorus ligand on the catalytic activity, �ve new nickel(II) complexes with P-ligands of different basicities and different steric demands were synthesized and fully characterized including the determination of the crystal structures of three of the complexes. e investigation of the catalytic activity of the new compounds showed a decisive in�uence of the steric properties of the P-ligand. A minimum steric demand is essential to ensure catalytic activity.

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“…Jensen et al 92 demonstrated the reducing properties of C 8 K in its reaction with bis(trialkyl phosphite )nickel (II) dichlorides and excess of the trialkyl phosphite to form a zerovalent nickel complex-tetrakis(triethy 1 phosphite) nickel(O).…”

Section: Chemical Propertiesmentioning

confidence: 99%

Lamellar Compounds of Graphite with Alkali Metals

Novikov¹,

Vol'pin²

1971

Russ. Chem. Rev.

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Reductions with Potassium Graphitate. I. Preparation of Nickel(0) Complexes of Trialkyl Phosphites.

Cited by 27 publications

References 0 publications

Rare Earth Arene-Bridged Complexes Obtained by Reduction of Organometallic Precursors

Rare Earth Arene-Bridged Complexes Obtained by Reduction of Organometallic Precursors

Influence of the Steric Demand of Coligands on the Catalytic Activity of Nickel(II) Complexes in the Copolymerization of Ethene and Carbon Monoxide

Lamellar Compounds of Graphite with Alkali Metals

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