Nucleophilic Additions of Trimethylsilyl Cyanide to Cyclic Oxocarbenium Ions:  Evidence for the Loss of Stereoselectivity at the Limits of Diffusion Control

2006 ◽  
Vol 128 (26) ◽  
pp. 8671-8677 ◽  
Author(s):  
Siddhartha R. Shenoy ◽  
Deborah M. Smith ◽  
K. A. Woerpel
Keyword(s):  
Diffusion Control ◽  
Nucleophilic Additions ◽  
Trimethylsilyl Cyanide ◽  
Oxocarbenium Ions

scholarly journals Nucleophilic Additions to Fused Bicyclic Five-Membered Ring Oxocarbenium Ions: Evidence for Preferential Attack on the Inside Face.

ChemInform ◽  
2004 ◽  
Vol 35 (11) ◽  
Author(s):  
Deborah M. Smith ◽  
Michelle B. Tran ◽  
K. A. Woerpel
Keyword(s):  
Membered Ring ◽  
Nucleophilic Additions ◽  
Oxocarbenium Ions ◽  
Inside Face

Nucleophilic Additions to Fused Bicyclic Five-Membered Ring Oxocarbenium Ions:  Evidence for Preferential Attack on the Inside Face

2003 ◽  
Vol 125 (46) ◽  
pp. 14149-14152 ◽  
Author(s):  
Deborah M. Smith ◽  
Michelle B. Tran ◽  
K. A. Woerpel
Keyword(s):  
Membered Ring ◽  
Nucleophilic Additions ◽  
Oxocarbenium Ions ◽  
Inside Face

Inhibition Effects of Some Organic Compounds on Zinc Corrosion in 3.5% NaCl

2008 ◽  
Vol 59 (5) ◽  
Author(s):  
Viorel Branzoi ◽  
Alina Pruna ◽  
Florina Branzoi
Keyword(s):  
Organic Compounds ◽  
Electrochemical Impedance ◽  
Corrosion Process ◽  
Diffusion Control ◽  
Cathodic Reaction ◽  
Zinc Electrode ◽  
Electrochemical Studies ◽  
Nacl Solution ◽  
Sodium Dodecylsulphate ◽  
Zinc Corrosion

The inhibition of zinc corrosion in 3.5% NaCl solution by some organic compounds (sodium dodecylsulphate (SDS), sodium dodecylbenzosulphonate (SDBS) and sodium 1,4-bis(2-etylhexyl) sulphosuccinate (AOT)) was investigated. The inhibition efficiencies were determined by polarization measurements of the zinc electrode in the solution. Electrochemical impedance spectroscopy (EIS) was also used for electrochemical studies of zinc electrode in this medium. The results showed that the used surfactants inhibit the cathodic reaction of hydrogen evolution and at low anodic overvoltage the corrosion process is under activation control, while at high anodic overvoltage the process is under diffusion control.

scholarly journals Metal(II) Coordination Polymers from Tetracarboxylate Linkers: Synthesis, Structures, and Catalytic Cyanosilylation of Benzaldehydes

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 204
Author(s):  
Yu Li ◽  
Chumin Liang ◽  
Xunzhong Zou ◽  
Jinzhong Gu ◽  
Marina V. Kirillova ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Polycarboxylic Acid ◽  
X Ray Diffraction ◽  
X Ray ◽  
Trimethylsilyl Cyanide ◽  
Effect Of Solvent ◽  
Highly Active ◽  
Solvent Type ◽  
Metal Organic ◽  
Chloride Salts

Three 2D coordination polymers, [Cu2(µ4-dpa)(bipy)2(H2O)]n∙6nH2O (1), [Mn2(µ6-dpa)(bipy)2]n (2), and [Zn2(µ4-dpa)(bipy)2(H2O)2]n·2nH2O (3), were prepared by a hydrothermal method using metal(II) chloride salts, 3-(2′,4′-dicarboxylphenoxy)phthalic acid (H4dpa) as a linker, as well as 2,2′-bipyridine (bipy) as a crystallization mediator. Compounds 1–3 were obtained as crystalline solids and fully characterized. The structures of 1–3 were established by single-crystal X-ray diffraction, revealing 2D metal-organic networks of sql, 3,6L66, and hcb topological types. Thermal stability and catalytic behavior of 1–3 were also studied. In particular, zinc(II) coordination polymer 3 functions as a highly active and recoverable heterogeneous catalyst in the mild cyanosilylation of benzaldehydes with trimethylsilyl cyanide to give cyanohydrin derivatives. The influence of various parameters was investigated, including a time of reaction, a loading of catalyst and its recycling, an effect of solvent type, and a substrate scope. As a result, up to 93% product yields were attained in a catalyst recoverable and reusable system when exploring 4-nitrobenzaldehyde as a model substrate. This study contributes to widening the types of multifunctional polycarboxylic acid linkers for the design of novel coordination polymers with notable applications in heterogeneous catalysis.

ChemInform Abstract: Nucleophilic Additions to Pyridinium Salts. Reduction of the Intermediate Dihydropyridines.

ChemInform ◽  
2010 ◽  
Vol 25 (39) ◽  
pp. no-no
Author(s):  
R. LAVILLA ◽  
T. GOTSENS ◽  
F. GULLON ◽  
J. BOSCH
Keyword(s):  
Nucleophilic Additions ◽  
Pyridinium Salts

Nucleophilic Additions toN-Glycosylnitrones. Asymmetric Synthesis of ?-Aminophosphonic Acids

1985 ◽  
Vol 68 (6) ◽  
pp. 1730-1747 ◽  
Author(s):  
Rolf Huber ◽  
Andreas Knierzinger ◽  
Jean-Pierre Obrecht ◽  
Andrea Vasella
Keyword(s):  
Asymmetric Synthesis ◽  
Nucleophilic Additions ◽  
Aminophosphonic Acids

ChemInform Abstract: Nucleophilic Additions to 5-Hydroxymethyl-2-pyrrolidinone: Synthesis of Chiral 2,5-Disubstituted Pyrrolidines.

ChemInform ◽  
2010 ◽  
Vol 26 (20) ◽  
pp. no-no
Author(s):  
K. H. AHN ◽  
G. J. KWON ◽  
W. CHOI ◽  
S. J. LEE ◽  
D. J. YOO
Keyword(s):  
Nucleophilic Additions

ChemInform Abstract: In the Blind Spot of Diffusion Control: 2-Fluoroallyl Cations and Their Various Possibilities for Stabilization.

ChemInform ◽  
2010 ◽  
Vol 22 (37) ◽  
pp. no-no
Author(s):  
Y. BESSIERE ◽  
Y. BESSARD ◽  
T. KOTANI ◽  
M. SCHLOSSER
Keyword(s):  
Blind Spot ◽  
Diffusion Control

scholarly journals Synthesis of γ-methoxy carboxylic acids via nucleophilic additions to oxycarbenium ions derived from 5-methoxy-2(3H)-dihydrofuranones

1994 ◽  
Vol 35 (45) ◽  
pp. 8437-8440 ◽  
Author(s):  
Arjan van Oeveren ◽  
Ben L. Feringa
Keyword(s):  
Carboxylic Acids ◽  
Nucleophilic Additions
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