ChemInform Abstract: Cesium Dithiolate Based Syntheses of Keto-Functionalized Thio-Crown Ethers Employing the Novel Building Block 1,3-Dimercaptoacetone. Molecular Structures of 2,5,9,12-Tetrathia-7-oxo-(13)-m-benzenophane and 1,4,7,10,13-Pentathiacyclohe

ChemInform ◽  
2010 ◽  
Vol 25 (5) ◽  
pp. no-no
Author(s):  
J. J. H. EDEMA ◽  
J. BUTER ◽  
F. S. SCHOONBEEK ◽  
A. MEETSMA ◽  
F. VAN BOLHUIS ◽  
...  
Keyword(s):  
Crown Ethers ◽  
Building Block ◽  
Molecular Structures ◽  
The Novel

scholarly journals Thermodynamically stable [4 + 2] cycloadducts of lanthanum-encapsulated endohedral metallofullerenes

2014 ◽  
Vol 10 ◽  
pp. 714-721 ◽  
Author(s):  
Yuta Takano ◽  
Yuki Nagashima ◽  
M Ángeles Herranz ◽  
Nazario Martín ◽  
Takeshi Akasaka
Keyword(s):  
Thermal Stability ◽  
Material Science ◽  
Molecular Structures ◽  
Spectroscopic Methods ◽  
Dynamic Nmr ◽  
The Novel ◽  
Endohedral Metallofullerenes ◽  
Derivatives Of ◽  
Paramagnetic Properties

The [4 + 2] cycloaddition of o-quinodimethanes, generated in situ from the sultine 4,5-benzo-3,6-dihydro-1,2-oxathiin 2-oxide and its derivative, to La metal-encapsulated fullerenes, La2@C80 or La@C82, afforded the novel derivatives of endohedral metallofullerenes (3a,b, 4a,b and 5b). Molecular structures of the resulting compounds were elucidated using spectroscopic methods such as MALDI–TOF mass, optical absorption, and NMR spectroscopy. The [4 + 2] adducts of La2@C80 (3a,b, and 4a,b) and La@C82 (5b), respectively, retain diamagnetic and paramagnetic properties, as confirmed by EPR spectroscopy. Dynamic NMR measurements of 4a at various temperatures demonstrated the boat-to-boat inversions of the addend. In addition, 5b revealed remarkable thermal stability in comparison with the reported [4 + 2] cycloadduct of pentamethylcyclopentadiene and La@C82 (6). These findings demonstrate the utility of sultines to afford thermodynamically stable endohedral metallofullerene derivatives for the use in material science.

Copolymers based on trialkylsilylethynyl-phenyl substituted benzodithiophene building block for efficient organic solar cells

2021 ◽  
Author(s):  
Haifen Liu ◽  
Zixuan Zhu ◽  
Huafeng Li ◽  
Weili Fan ◽  
Kaihua Ning ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Building Block ◽  
Power Conversion ◽  
Molecular Structures ◽  
The Past ◽  
Conversion Efficiencies

Non-fullerene acceptors have received a great deal of attention over the past several years, and numerous modifications on the molecular structures significantly boosted the power conversion efficiencies (PCEs). To be...

Azaborolyl-Komplexe, 25 Das (1-tert-Butyl-2-methyl-1 H-1,2-azaborolyl)cobalt-Fragment (AbCo) als Synthesebaustein / Azaborolyl Complexes, 25. The (1-tert-Butyl-2-methyl-1 H-1,2-azaborolyl)cobalt Fragment (AbCo) as Building Block in Synthesis

1990 ◽  
Vol 45 (9) ◽  
pp. 1235-1242 ◽  
Author(s):  
Günter Schmid ◽  
Abdel K. Boutrid ◽  
Eva-Maria Kreuzer
Keyword(s):  
Mass Spectrometry ◽  
Ir Spectroscopy ◽  
Building Block ◽  
Molecular Structures ◽  
Dinuclear Complex ◽  
Tetranuclear Cluster ◽  
Tert Butyl ◽  
Trinuclear Cluster ◽  
Mononuclear Complexes

The (1-tert-butyl-2-methyl-1 H-1,2-azaborolyl)cobalt fragment (AbCo), available from AbCo(C2H4)2 (1), serves as a building block in a series of complexes and clusters. The mononuclear complexes AbCo(C2H4)PMe3 (2), AbCo(PMe3)2 (3), AbCo(C2H4)P(OMe)3 (4), AbCo(P(OMe)3)2 (5), AbCo(C2H4)CO (6), and AbCo(CO)2 (7) are easily prepared from 1. AbCo(CpH) (8) is formed from 1 and CpCo(C2H4)2 together with AbCp3Co4H4 (9). The tetranuclear cluster Ab4Co4H4 (10) results, if 1 is warmed to 80 °C without a solvent. Ab3(CO)3Co3 (11) is available by a co-thermolysis of 1 and 7. Thermolysis of 6 leads to the trinuclear cluster Ab3(CO)2Co3 (12). Photolytical degradation of 7 forms the dinuclear complex Ab2(CO)3Co2 (13). Mass spectrometry, IR spectroscopy, and NMR investigations serve to elucidate the molecular structures.

Complexation of metal ions with the novel azathia crown ethers carrying anthracene pendant in acetonitrile–dichloromethane

Polyhedron ◽  
2010 ◽  
Vol 29 (3) ◽  
pp. 1069-1077 ◽  
Author(s):  
Ümmühan Ocak ◽  
Miraç Ocak ◽  
Aysel Başoğlu ◽  
Semanur Parlayan ◽  
Dilek Başaran ◽  
...  
Keyword(s):  
Metal Ions ◽  
Crown Ethers ◽  
The Novel
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