Der 2,4,6-Tris(trifluormethyl)phenylsubstituent; Beispiele für elektronisch und sterisch stabilisierte niederkoordinierte Hauptgruppenelemente

Scholz, M.; Roesky, Herbert W.; Keller, K.; Edelmann, Frank T.

doi:10.1016/0022-328x(89)87317-6

Cited by 83 publications

(37 citation statements)

References 17 publications

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“…[26] The endocyclic P-P-P angles span the range from 78.99(5)°(P4) to 84.35(5)°(P3) and are compatible with those of other cyclotetraphosphanes. [25][26][27][28] The fourmembered ring is not uniformly bent, however, as the nonbonding P-P distances are 3.6 Å for P2-P4 and 2.8 Å for P1-P3. Table 9.…”

Section: X-ray Structuresmentioning

confidence: 96%

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N‐(2,4,6‐Trimethylborazinyl)‐Substituted Phosphanes, Arsanes, and Stibanes

2007

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Reaction of the N‐lithioborazine LiH2N3B3Me3·OEt2 (2) in diethyl ether with PCl3 or PBr3 leads to the borazinylphosphanes (Me3B3N3H2)PX2, (Me3B3N3H2)2PX (X = Cl, Br), and (Me3B3N3H2)3P, depending on the initial stoichiometry. The analogous arsane and stibane derivatives were obtained in a similar manner. While (Me3B3N3H2)2PBr is reduced byLiAlH4 in diethyl ether/hexane to give the monophosphane (Me3B3N3H2)2PH (13), the reaction of (Me3B3N3H2)PBr2 (5) with LiAlH4 in diethyl ether/hexane produces the zwitterionic compound [Me3B3N2(HN)]–P+H2Et (14). Dehalogenation of (Me3B3N3H2)2PBr (6) with Na yields the diphosphane (Me3B3N3H2)2PP(H2N3B3Me3)2 (18), while the mixed diphosphane (Me3B3N3H)2PPmes2 (17) is obtained from 6 and LiPmes2. Dehalogenation of Me3B3N3H2PBr2 with Na results in the exclusive formation of (Me3B3N3H2)4P4 (19), while the reaction of 5 with Li2Pmes leads to a mixture of cyclotetraphosphanes (mes)4–n(Me3B3N3H2)nP4 (A–F) along with bicyclic P4mes2. The new compounds have been characterized by NMR and IR spectroscopy and partly by mass spectrometry. X‐ray structures for compounds, 4, 5, 6, 9, 13, 14, 17, 18, 19, and E have been determined. All show different B–N bond lengths within the borazine rings, and some have borazine rings in a half‐chair conformation.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

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Section: X-ray Structuresmentioning

confidence: 96%

“…[25][26][27][28] The rings at atoms P1 and P3 are twisted against each other by 20°while those at atoms P2 and P4 make an angle of 93°. Amongst the P-P bonds, those to atom P4 are significantly longer than those to atom P2.…”

Section: X-ray Structuresmentioning

confidence: 99%

N‐(2,4,6‐Trimethylborazinyl)‐Substituted Phosphanes, Arsanes, and Stibanes

2007

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“…[2,3] They can bind to transition metal fragments either in an η 1 fashion, via a lone pair on phosphorus, or in an η 2 mode, utilising the π system of the P=P double bond; some examples of both coordination types for Ar F P=PAr F 9 (Ar F = 2,4,6-(CF 3 ) 3 C 6 H 2 ), [4] with strongly electron-withdrawing substituents, have been reported by us. [5,6] Occasionally it is possible to coordinate a metal to each of the phosphorus atoms in an η 1 mode, as in the mono-and di-AuCl complexes of Ar*P=PAr* 5 (Ar* = 2,4,6-t Bu 3 C 6 H 2 ).…”

Section: Introductionmentioning

confidence: 99%

“…[7] For an unsymmetrical diphosphene R 1 P=PR 2 there is the additional possibility of η 1 coordination by either of the inequivalent phosphorus atoms. Cowley et al showed that the diphosphene 2,4,6-t Bu 3 C 6 H 2 P(1)=P(2)CH(SiMe 3 ) 2 reacted with Fe 2 (CO) 9 to afford a single product in 63% yield, with Fe(CO) 4 coordinated to P(2). [8] This observation is consistent with M A N U S C R I P T…”

Section: Introductionmentioning

confidence: 99%

Platinum(II) complexes of some unsymmetrical diphosphenes

Dillon

Fox

Gibson

et al. 2017

Journal of Organometallic Chemistry

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“…[7] Until now only little is known about electron-deficient bis(phosphaalkenes), [8][9][10] although many electron-rich low-coordinated phosphanes have been reported in the last decades. [11][12][13] A special focus of experimental and theoretical work was set on push-pull-substituted low-coordinated phosphanes, especially iminophosphanes, [14,15] diphosphenes, [16,17] and phosphaalkenes. [9] Recently, the twist angle of diphosphenes was studied theoretically, but a detailed explanation highlighting the influence of the electron-accepting groups remains still elusive.…”

Section: Introductionmentioning

confidence: 99%

2,3,5,6‐Tetrafluoro‐p‐phenylenebis(phosphanes) – Preparation and Structure of an Electron‐Poor P–R_F–P Linker

et al. 2009

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A general synthetic access to functional 2,3,5,6‐tetrafluoro‐p‐phenylenebis(phosphanes) is presented, which should open the way to linear phosphorus‐based conjugated systems incorporating an electron‐deficient aryl moiety. 1,4‐Bis[bis(diethylamino)phosphanyl]‐2,3,5,6‐tetrafluorobenzeneand 1,4‐bis(dichlorophosphanyl)‐2,3,5,6‐tetrafluorobenzene have been synthesized in good yields and were characterized by spectroscopic methods and X‐ray crystallography.

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Der 2,4,6-Tris(trifluormethyl)phenylsubstituent; Beispiele für elektronisch und sterisch stabilisierte niederkoordinierte Hauptgruppenelemente

Cited by 83 publications

References 17 publications

N‐(2,4,6‐Trimethylborazinyl)‐Substituted Phosphanes, Arsanes, and Stibanes

N‐(2,4,6‐Trimethylborazinyl)‐Substituted Phosphanes, Arsanes, and Stibanes

Platinum(II) complexes of some unsymmetrical diphosphenes

2,3,5,6‐Tetrafluoro‐p‐phenylenebis(phosphanes) – Preparation and Structure of an Electron‐Poor P–R_F–P Linker

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Der 2,4,6-Tris(trifluormethyl)phenylsubstituent; Beispiele für elektronisch und sterisch stabilisierte niederkoordinierte Hauptgruppenelemente

Cited by 83 publications

References 17 publications

N‐(2,4,6‐Trimethylborazinyl)‐Substituted Phosphanes, Arsanes, and Stibanes

N‐(2,4,6‐Trimethylborazinyl)‐Substituted Phosphanes, Arsanes, and Stibanes

Platinum(II) complexes of some unsymmetrical diphosphenes

2,3,5,6‐Tetrafluoro‐p‐phenylenebis(phosphanes) – Preparation and Structure of an Electron‐Poor P–RF–P Linker

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2,3,5,6‐Tetrafluoro‐p‐phenylenebis(phosphanes) – Preparation and Structure of an Electron‐Poor P–R_F–P Linker