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Baudler, M.; Winzek, P.

doi:10.1002/(sici)1521-3749(199903)625:3<417::aid-zaac417>3.3.co;2-w

Cited by 16 publications

(28 citation statements)

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“…To the best of our knowledge, 16 is the first structurally characterized cyclo ‐triphosphane with a chloro substituent at the P 3 ring system. Other similar species were only characterized by NMR spectroscopy so far 31. 32, 45–48…”

Section: Resultsmentioning

confidence: 99%

“…Only two examples of this class of compounds are described in the literature. The chloro-substituted cyclo-tetraphosphane [ClP(m-PSitBu 3 )] 2 (3 a) was identified by 31 P NMR spectroscopy as an intermediate of the reaction of PCl 3 with NaSitBu 3 , but was neither isolated nor further characterised. [17] In contrast, the iodo-substituted analogue [IP(m-Scheme 1.…”

Section: Introductionmentioning

confidence: 99%

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Dimers and Trimers of Diphosphenes: A Wealth of Cyclo‐Phosphanes

Bresien

Hering

Schulz

et al. 2014

Chemistry A European J

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Various new P-based ring systems were synthesised by transferring established reaction routes from NP chemistry to the analogous PP compounds. Due to the different electronic situations of phosphorus and nitrogen with respect to s and p character of the lone pair, different reactivity of the phosphorus compounds was observed, especially with regard to the specificity of the reactions and the stability of the products. Whereas Mes*NPCl (Mes*=2,4,6-tri-tert-butylphenyl) is stable in the solid state and in solution, the formal phosphorus congener Mes*PPCl is highly reactive and could not be observed. Instead, several formal dimers and trimers of Mes*PPCl could be isolated, which constitute an intriguing variety of three- and four-membered ring systems.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dimers and Trimers of Diphosphenes: A Wealth of Cyclo‐Phosphanes

Bresien

Hering

Schulz

et al. 2014

Chemistry A European J

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“…While the first example of this class of compounds, cyclo‐ (PPh) 5 , was synthesised as early as 1877,2 the first cyclooligophosphanide anions cyclo ‐(P n R n −1 ) − were reported only about 100 years later 3. 4 Even today, the number of readily accessible, pure compounds is still small 5. Thus, the alkali metal compounds K[ cyclo ‐(P 3 t Bu 2 )],3 K[ cyclo ‐(P 5 Ph 4 )]5 and Li[ cyclo ‐(P n t Bu n −1 )] ( n =3–5)6, 7 were obtained only in inseparable mixtures, and characterised by 31 P NMR spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

The Versatile Reactivity of cyclo‐(P₅tBu₄)⁻ with Complexes of the Nickel Triad

Gómez‐Ruiz

Schisler

Lönnecke

et al. 2007

Chemistry A European J

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Na[cyclo-(P(5)tBu(4))] (1) reacts with [NiCl(2)(PEt(3))(2)] and [PdCl(2)(PMe(2)Ph)(2)] with elimination of tBuCl and formation of the corresponding metal(0) cyclopentaphosphene complexes [Ni{cyclo-(P(5)tBu(3))}(PEt(3))(2)] (2) and [Pd{cyclo-(P(5)tBu(3))}(PMe(2)Ph)(2)] (3). In contrast, complexes with the more labile triphenylphosphane ligand, such as [MCl(2)(PPh(3))(2)] (M=Ni, Pd), react with 1 with formation of [NiCl{cyclo-(P(5)tBu(4))}(PPh(3))] (4) and [Pd{cyclo-(P(5)tBu(4))}(2)] (5), respectively, in which the cyclo-(P(5)tBu(4)) ligand is intact. In the case of palladium, the cyclopentaphosphene complex [Pd{cyclo-(P(5)tBu(3))}(PPh(3))(2)] (6) in trace amounts is also formed. However, [Ni{cyclo-(P(5)tBu(4))}(2)] (7) is easily obtained by reaction of two equivalents of 1 and one equivalent of [NiCl(2)(bipy)] at room temperature. Complex 7 rearranges on heating in n-hexane or toluene to the previously unknown [Ni{cyclo-(P(5)tBu(4))PtBu}{cyclo-(P(4)tBu(3))}] (8), which presumably is formed via the intermediate [Ni{cyclo-(P(5)tBu(4))}{cyclo-(P(4)tBu(3))PtBu}], which, after an unexpected and unprecedented phosphanediide migration, gives 8, but always as an inseparable mixture with 7. In the reaction of 1 with [PtCl(2)(PPh(3))(2)], ring contraction and formation of [PtCl{cyclo-(P(4)tBu(3))PtBu}(PMe(2)Ph)] (9) is observed. Complexes 3-5 and 7-9 were characterised by (31)P NMR spectroscopy, and X-ray structures were obtained for 5-9.

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“…[3] The second reason is that the synthesis of many oligophosphanes is rather unselective, and extremely tedious procedures may be required to obtain a pure compound, as for instance in the isolation of {cyclo-(P 4 tBu 3 )} 2 PtBu. [7] Nevertheless, due to the variety of donor atoms and thus binding modes the coordination chemistry of these compounds is fascinating as the very few investigations already show. [2] For example, the reaction of P 7 Et 3 with [Cr(CO) 5 (thf )] yields five different mono-, bi-, tri-and tetrametallic complexes.…”

mentioning

confidence: 99%

“…Octaphosphane 1 was prepared by reductive coupling of cyclo-(P 4 tBu 3 Cl), which is prepared from cyclo-(P 3 tBu 3 ) by a PCl insertion reaction, [17] in an overall yield of 28 %. The major advantage of this method compared to the procedure reported previously by Baudler is a higher yield and avoiding the highly reactive phosphorus hydride PHtBuPtBuPHtBu [18] as an intermediate. [19] In the solid state, an all-trans configuration of the tBu groups and a butterfly conformation of the four-membered rings are observed.…”

mentioning

confidence: 99%

Dynamic Gold(I) Complexes of Hexa‐tert‐butyl‐octaphosphane

Grell

Hey‐Hawkins

2020

Eur J Inorg Chem

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A facile synthesis for {cyclo‐(P4tBu3)}2 (1) is reported making the phosphane available for follow‐up chemistry. Octaphosphane 1 reacts with [AuCl(tht)] (tht = tetrahydrothiophene) to give a monometallic {[AuCl(1‐κ2P2,P4')], 2}, bimetallic {[(AuCl)2(1‐κ2P2,P4',κP2')], 3} and trimetallic complex {[(AuCl)3(1‐κ2P2,P4',κP2',κP4)], 4} in which up to four phosphorus atoms of the ligand are involved in coordination. In each of these complexes one gold(I) atom is chelated in an unusual distorted T‐shaped coordination mode which undergoes a rapid exchange between both donor atoms in solution. This mode of coordination in combination with the flexibility of the phosphane ligand moreover gives rise to an interesting dynamic behavior of the monometallic complex 2 which was elucidated by NMR spectroscopy, X‐ray crystallography and DFT calculations.

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Cited by 16 publications

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Dimers and Trimers of Diphosphenes: A Wealth of Cyclo‐Phosphanes

Dimers and Trimers of Diphosphenes: A Wealth of Cyclo‐Phosphanes

The Versatile Reactivity of cyclo‐(P₅tBu₄)⁻ with Complexes of the Nickel Triad

Dynamic Gold(I) Complexes of Hexa‐tert‐butyl‐octaphosphane

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Cited by 16 publications

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Dimers and Trimers of Diphosphenes: A Wealth of Cyclo‐Phosphanes

Dimers and Trimers of Diphosphenes: A Wealth of Cyclo‐Phosphanes

The Versatile Reactivity of cyclo‐(P5tBu4)− with Complexes of the Nickel Triad

Dynamic Gold(I) Complexes of Hexa‐tert‐butyl‐octaphosphane

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The Versatile Reactivity of cyclo‐(P₅tBu₄)⁻ with Complexes of the Nickel Triad