Synthesis of two crystalline species of the Friedel-Crafts intermediate antimony pentachloride-p-toluoyl chloride. Crystal structures of the donor-acceptor complex and of the ionic salt

1972 ◽  
Vol 94 (16) ◽  
pp. 5718-5723 ◽  
Author(s):  
Bernard Chevrier ◽  
Jean Marie Le Carpentier ◽  
Raymond Weiss
Keyword(s):  
Crystal Structures ◽  
Antimony Pentachloride ◽  
Acceptor Complex ◽  
Chloride Crystal ◽  
Ionic Salt ◽  
Donor Acceptor

scholarly journals Notizen: Darstellung und IR-Spektrum von OsO4 · 2 SbCl5 / Preparation and IR Spectrum of OsO4 · 2 SbCl5

1980 ◽  
Vol 35 (12) ◽  
pp. 1587-1588 ◽  
Author(s):  
Kurt Dehnicke ◽  
Rainer Lößberg
Keyword(s):  
Ir Spectrum ◽  
Ligand Exchange ◽  
Exchange Reactions ◽  
Antimony Pentachloride ◽  
Acceptor Complex ◽  
Donor Acceptor

Abstract Osmiumtetroxide and antimony pentachloride form a donor acceptor complex, OsO4 · 2 SbCl5. According to the IR spectrum the complex contains OsOSb bridges. With VCl4, TiCl4, MOCl5 and osmiumtetroxide rapid ligand exchange reactions occur, forming VOCl3, TiOCl2 and several oxochlorides of molybdenum and OsCl4, respectively.

Metal-Free Photoinduced Hydroalkylation Cascade Enabled by an Electron-Donor-Acceptor Complex

2020 ◽  
Author(s):  
José Tiago Menezes Correia ◽  
Gustavo Piva da Silva ◽  
Camila Menezes Kisukuri ◽  
Elias André ◽  
Bruno Pires ◽  
...  
Keyword(s):  
Electron Donor ◽  
Functional Group ◽  
Photoexcited Electron ◽  
One Pot ◽  
Quaternary Centers ◽  
Metal Free ◽  
Acceptor Complex ◽  
Catalyst Free ◽  
Donor Acceptor ◽  
Radical Cascade

A metal- and catalyst-free photoinduced radical cascade hydroalkylation of 1,7-enynes has been disclosed. The process is triggered by a SET event involving a photoexcited electron-donor-aceptor complex between NHPI ester and Hantzsch ester, which decomposes to afford a tertiary radical that is readily trapped by the enyne. <a>The method provides an operationally simple, robust and step-economical approach to the construction of diversely functionalized dihydroquinolinones bearing quaternary-centers. A sequential one-pot hydroalkylation-isomerization approach is also allowed giving access to a family of quinolinones. A wide substrate scope and high functional group tolerance was observed in both approaches</a>.

Donor–Acceptor Complex Enables Cascade Radical Cyclization of N-Arylacrylamides with Katritzky Salts

2021 ◽  
Author(s):  
Yu Lu ◽  
Chang-Zhen Fang ◽  
Qiang Liu ◽  
Bao-Lin Li ◽  
Zhi-Xiang Wang ◽  
...  
Keyword(s):  
Radical Cyclization ◽  
Acceptor Complex ◽  
Donor Acceptor

Crystal structures of highly stabilized ylides: methyl(3-methoxy,2-methoxycarbonylbenzoyl) triphenyl- phosphoranylideneacetate and methyl(2-methoxycarb-6-nitrobenzoyl)triphenyl phos phoranyl ideneacetate and the salt methyl(triphenylphosphoranylidene)acetate tetrafluoroborate

1998 ◽  
Vol 76 (12) ◽  
pp. 1844-1852
Author(s):  
Fernande D Rochon ◽  
Robert Melanson ◽  
Margaret M Kayser
Keyword(s):  
Key Words ◽  
Crystal Structures ◽  
Nitro Derivative ◽  
Transient Species ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ionic Salt ◽  
Higher Temperature ◽  
Cyclic Anhydrides ◽  
Wittig Reactions

At lower temperatures stabilized ylides react with unsymmetrically substituted phthalic anhydrides to give two acyclic adducts. When the reactions are allowed to proceed at higher temperature enol lactones are formed. Identification of the acyclic intermediates was necessary to understand the mechanism of these Wittig reactions. The transient species trapped in the reaction with trimethyloxonium tetrafluoroborate were unambiguously identified by crystallographic methods. The crystal structures of the tetrafluoroborate salt of methyl(triphenylphosphoranyl idene)- acetate (8), methyl(3-methoxy,2-methoxycarbonylbenzoyl)triphenylphosphoranylideneacetate (6β), and methyl(2-methoxycarbonyl,6-nitrobenzoyl)triphenylphosphoranylideneacetate (7α) were studied by X-ray diffraction. The ionic salt (8) is monoclinic, P21c,a= 12.640(5), b = 13.945(9), c = 14.825(6) Å, β = 125.32(3)°, Z = 4, and R = 0.065 (F >5.4 σ(F)). Crystal 6 β is monoclinic, P21c,a = 16.391(16), b = 9.029(6), c = 19.835(19) Å, β = 116.60(6)°, Z = 4, and R = 0.070 (F > 4.6 σ(F)), while crystal 7α is also monoclinic, P21c,a = 9.513(5), b = 9.361(3), c = 30.908(13) Å, β = 98.42(3)°, Z = 4, and R = 0.057 (F >5 σ(F)). In the BF 4- salt (12), the four P-C distances are equal (1.791(5)-1.801(7) Å) with identical tetrahedral angles. For the two triphenylphosphoranylideneacetate compounds, the fourth P-C(1) bond is shorter (1.762(6)-1.734(5) Å) than the three P-C(Ph) bonds (avg. 1.809(5) Å). The angles C(1)-P-C(Ph) are also larger (avg. 112.9(2)° for 6β and 111.9(2)° for 7α) than the C(Ph)-P-C(Ph) angles (avg. 105.8(2)° for 6 β and 106.9(2)° for 7α). These values suggest a multiple nature for the P-C(1) bond. In the nitro derivative, the nitro and the ester groups are disordered equally in positions 2 and 6. Key words: Wittig reactions, cyclic anhydrides, stabilized ylide, phosphoranylidenes, crystal structures.

[Me3SiN(PPh3)·ICN]:  A New Labile Donor−Acceptor Complex

2001 ◽  
Vol 40 (20) ◽  
pp. 5182-5187 ◽  
Author(s):  
Rhett Kempe ◽  
Elmar Kessenich ◽  
Axel Schulz
Keyword(s):  
Acceptor Complex ◽  
Donor Acceptor

Molecular Tetrominoes: Selective Masking of Donor pi-face to Control Configuration of Donor-Acceptor Complex

2021 ◽  
Author(s):  
Jenna L Sartucci ◽  
Arindam Maity ◽  
Manikandan Mohanan ◽  
Jeffery A. Bertke ◽  
Miklos Kertesz ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Organic Electronics ◽  
Molecular Design ◽  
Design Rules ◽  
Acceptor Complex ◽  
Donor Acceptor ◽  
Doping Mechanism ◽  
Control Configuration

Understanding the doping mechanism in organic semiconductors and generating molecular design rules to control the doping process is crucial to improve the performance of organic electronics. Even though controlling the...

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