Eine 1-Silyl-1H-phosphiren/1,2-Dihydro-1,2-phosphasilet-Umlagerung — der entscheidende Schritt zur Synthese von Heterocyclen mit 2-Phospha-1,3-dien-Einheiten

Haber, S.; Boese, Roland; Regitz, Manfred

doi:10.1002/ange.19901021254

Cited by 16 publications

(4 citation statements)

References 10 publications

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“…rearrangement is easily followed by 31P NMR spectroscopy; the high-field resonance of the X5-phosphorus between -41 and -43 ppm is drastically shifted downfield (-*-+160 ppm), and the P-P coupling constant drops from ca. 180 to ca. 68 Hz whereas the resonance of the 2-coordinate phosphorus remains at very low fields (ca.…”

Section: Synthesis Of Polycyclic Diphosphiranesmentioning

confidence: 98%

Chemistry of 3-membered carbon-phosphorus heterocycles

Mathey¹

1990

Chem. Rev.

263

114

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Section: Synthesis Of Polycyclic Diphosphiranesmentioning

confidence: 98%

Chemistry of 3-membered carbon-phosphorus heterocycles

Mathey¹

1990

Chem. Rev.

263

114

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“…127 The reaction of TTS-Li with 1-chloro-1H-phosphyrene 33 yielded the TTS-derivative 34, which is relatively stable at 20 8C, but decomposes in light. 128 Sodium-potassium phosphide prepared from white or red phosphorus and a Na/K alloy reacts with chloro tris(trimethylsilyl)silane to give [(Me 3 Si) 3 Si] 3 P 7 (35), a colourless crystalline compound in which the nortricyclane cell P 7 contains three TTS substituents. 129 The phosphanortricyclanic cell is a relatively stable structure.…”

Section: B Phosphorusmentioning

confidence: 99%

“…Photochemical (l = 280 nm) expansion of the three-membered phosphorus-containing ring 34 involving the tris(trimethylsilyl)silyl group is known. 128 Low-valent transition metal complexes containing a TTS group are usually unstable; their stabilisation occurs at the expense of the migration of the silyl group. 215 Me(Me2Si)4Me Similar migration is observed in the case of the TTS platinum complex 124.…”

Section: Rearrangements Of Organoelement Derivativesmentioning

confidence: 99%

The tris(trimethylsilyl)silyl group in organic, coordination and organometallic chemistry

Корнев¹

2004

Russ. Chem. Rev.

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The signal properties of polycrystalline mercuric iodide (HgI 2 ) film detectors, under irradiation conditions relevant to mammographic, radiographic, fluoroscopic and radiotherapy x-ray imaging, are reported. Each film detector consists of an ∼230 to ∼460 µm thick layer of HgI 2 (fabricated through physical vapour deposition or a screen-print process) and a thin barrier layer, sandwiched between a pair of opposing electrode plates. The high atomic number, high density and low effective ionization energy, W EFF , of HgI 2 make it an attractive candidate for significantly improving the performance of active matrix, flat-panel imagers (AMFPIs) for several x-ray imaging applications. The temporal behaviour of current from the film detectors in the presence and in the absence of radiation was used to examine dark current levels, the lag and reciprocity of the signal response, x-ray sensitivity and W EFF . The results are discussed in the context of present AMFPI performance. This study provides performance data for a wide range of potential medical x-ray imaging applications from a single set of detectors and represents the first investigation of the signal properties of polycrystalline mercuric iodide for the radiotherapy application.Z Su et al

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“…Here, we report on the isomerization of 2-phospha-4-silabicyclo[1.1.0]butane A to its valence isomers 1-phospha-4-sila-1,3-butadiene B and 1,2-dihydro-1,2-phosphasilete C (only one other synthesis of 1,2-dihydro-1,2-phosphasiletes was reported: [ 26 – 28 ]), using high-level ab initio calculations at the (U)QCISD(T)/6-311+G**//(U)QCISD/6-31G* level of theory. We will compare the differences between a direct A → C pathway versus the isomerization via butadiene B .…”

Section: Introductionmentioning

confidence: 99%

Valence isomerization of 2-phospha-4-silabicyclo[1.1.0]butane: a high-level ab initio study

2006

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The rearrangements for 2-phospha-4-silabicyclo[1.1.0]butane, analogous to the valence isomerization of the hydrocarbons bicyclobutane, 1,3-butadiene, and cyclobutene, were studied at the (U)QCISD(T)/6-311+G**//(U)QCISD/6-31G* level of theory. The monocyclic 1,2-dihydro-1,2-phosphasiletes are shown to be the thermodynamically preferred product, in contrast to the isomerization of the hydrocarbons, which favors the 1,3-butadiene structure. Furthermore, an unprecedented direct isomerization pathway to the 1,2-dihydro-1,2-phosphasiletes was identified. This pathway is competitive with the isomerization via the open-chain butadienes and becomes favorable when electron-donating substituents are present on silicon.

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Eine 1-Silyl-1H-phosphiren/1,2-Dihydro-1,2-phosphasilet-Umlagerung — der entscheidende Schritt zur Synthese von Heterocyclen mit 2-Phospha-1,3-dien-Einheiten

Cited by 16 publications

References 10 publications

Chemistry of 3-membered carbon-phosphorus heterocycles

Chemistry of 3-membered carbon-phosphorus heterocycles

The tris(trimethylsilyl)silyl group in organic, coordination and organometallic chemistry

Valence isomerization of 2-phospha-4-silabicyclo[1.1.0]butane: a high-level ab initio study

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