Regioselectivity of Complexations of Substituted Phenyl Benzoates and Phenyl Phenylacetates with Cr(CO)6

1994 ◽  
Vol 59 (9) ◽  
pp. 2095-2102
Author(s):  
Pavol Hrnčiar ◽  
Peter Černák ◽  
Vladimír Gajda ◽  
Štefan Toma
Keyword(s):  
Catalytic Activity ◽  
Benzoic Acid ◽  
Phenylacetic Acid ◽  
Substituted Phenols ◽  
Acid Moiety ◽  
Very High

Selectivity of complexation of substituted phenyl benzoates is very low. In most cases, comparable yields of both regioisomeric complexes are isolated. Exception is 4-chlorophenyl ester, where benzoic acid moiety is complexed nearly exclusively. Very high regioselectivity of complexation was observed with substituted phenyl phenylacetates. The substituent of substituted phenols has not any effect on the complexation, and only phenylacetic acid moiety is complexed. This observation supports the recently proposed mechanism of the catalytic activity of the esters at arene complexation.

Synthesis and (fluoro)solvatochromism of two 3-styryl-2-pyrazoline derivatives bearing benzoic acid moiety: A spectral, crystallographic and computational study

2021 ◽  
pp. 115737
Author(s):  
Dimitris Matiadis ◽  
Katarzyna E. Nowak ◽  
Eleni Alexandratou ◽  
Antonios Hatzidimitriou ◽  
Marina Sagnou ◽  
...  
Keyword(s):  
Benzoic Acid ◽  
Computational Study ◽  
Acid Moiety

THE IONIZATION CONSTANTS OF p-NITROPHENYLACETIC AND PHENYLMALONIC ACIDS

1933 ◽  
Vol 8 (5) ◽  
pp. 447-449 ◽  
Author(s):  
Steward Basterfield ◽  
James W. Tomecko
Keyword(s):  
Benzoic Acid ◽  
Nitro Group ◽  
Malonic Acid ◽  
Phenylacetic Acid ◽  
Ionization Constants ◽  
Side Chain ◽  
Cooh Group ◽  
Conductivity Data ◽  
Nitrobenzoic Acid ◽  
Phenylmalonic Acid

The ionization constants of p-nitrophenylacetic and phenylmalonic acids have been determined from conductivity data. The value of K for p-nitrophenylacetic acid at 25 °C. is 1.04 × 10−4, about twice that of phenylacetic acid. The nitro group in the nucleus has not as powerful an effect on the ionization when the COOH group is in the side chain as it has when both nitro group and COOH are in the nucleus. K for p-nitrobenzoic acid is six times as great as K for benzoic acid. K for phenylmalonic acid is 2. 77 × 10−3 as compared with 1.6 × 10−3 for malonic acid.

The Study on Solid Superacid Synthesis of K12A with Manufacturing Equipment

2012 ◽  
Vol 583 ◽  
pp. 285-288
Author(s):  
Dong Mei Zhao ◽  
Xue Peng Liu
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Design Method ◽  
Orthogonal Design ◽  
Manufacturing Equipment ◽  
Solid Superacid ◽  
Orthogonal Design Method ◽  
Superacid Catalyst ◽  
Calcined Temperature ◽  
Very High

By orthogonal design method, Catalytic activity of /ZrO2 solid superacid is studied, and the influence of catalyst characteristic and structure by manufacturing equipment is issued. It is concluded that the best prepared conditions of the superacid catalyst /ZrO2 for the synthesis of Octyl-Polyglycoside are followed:(1) PH=9.5; (2) calcined temperature at 500; (3) M(H2SO4)=0.5mol/L. Using this kind of catalyst the conversion of glueoside may reach as high as 96% in the synthesis of OCtyl-Polyglycoside and the selectivity is very high for the synthesis of Octyl-Polyglycoside. By introducing other metal oxide, the catalytic activity of complex solid superacid is studied.

Monodispersed palladium–cobalt alloy nanoparticles assembled on poly(N-vinyl-pyrrolidone) (PVP) as a highly effective catalyst for dimethylamine borane (DMAB) dehydrocoupling

RSC Advances ◽  
2016 ◽  
Vol 6 (29) ◽  
pp. 24097-24102 ◽  
Author(s):  
Betül Çelik ◽  
Yunus Yıldız ◽  
Hakan Sert ◽  
Esma Erken ◽  
Yagmur Koşkun ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Performance ◽  
Vinyl Pyrrolidone ◽  
Alloy Nanoparticles ◽  
Turnover Frequency ◽  
Cobalt Alloy ◽  
High Turnover ◽  
Effective Catalyst ◽  
Dimethylamine Borane ◽  
Very High

Monodispersed PdCo@PVP NPs showed record catalytic activity, giving the best catalytic performance yet with a very high turnover frequency.

scholarly journals A New Protein Conformation Indicator Based on Biarsenical Fluorescein with an Extended Benzoic Acid Moiety

2004 ◽  
Vol 20 (2) ◽  
pp. 273-278 ◽  
Author(s):  
Jun NAKANISHI ◽  
Mizuo MAEDA ◽  
Yoshio UMEZAWA
Keyword(s):  
Benzoic Acid ◽  
Protein Conformation ◽  
Acid Moiety ◽  
New Protein

Effect of the benzoic acid additives on the catalytic activity of tetrabuthoxytitanium in the synthesis of benzanilide

2011 ◽  
Vol 81 (9) ◽  
pp. 1839-1844 ◽  
Author(s):  
L. Shteinberg ◽  
V. V. Marshalova ◽  
V. M. Dibrova ◽  
S. M. Shein
Keyword(s):  
Catalytic Activity ◽  
Benzoic Acid

Stability and catalytic properties of μ-oxo and μ-nitrido dimeric iron tetrasulfophthalocyanines in the oxidation of Orange II by tert-butylhydroperoxide

2014 ◽  
Vol 18 (07) ◽  
pp. 604-613 ◽  
Author(s):  
Anna S. Makarova ◽  
Evgeny V. Kudrik ◽  
Sergei V. Makarov ◽  
Oskar I. Koifman
Keyword(s):  
Catalytic Activity ◽  
Aqueous Solutions ◽  
Catalytic Oxidation ◽  
Organic Compounds ◽  
High Stability ◽  
Catalytic Properties ◽  
Orange Ii ◽  
Tert Butylhydroperoxide ◽  
Good Catalytic Activity ◽  
Very High

A study of catalytic activity of μ-nitrido- and μ-oxo-dimeric iron tetrasulfophthalocyanines in the oxidation of Orange II by tert-butylhydroperoxide in aqueous solutions has been performed. It is shown that though in one catalytic cycle activity of μ-oxo-dimer is higher, stability of this complex in oxidative conditions is poor. μ-nitrido-dimer combines relatively good catalytic activity with very high stability in the presence of tert-butylhydroperoxide. The mechanisms of oxidative decomposition of dimers and catalytic oxidation of Orange II have been proposed on the base of kinetic results. The products of catalytic processes are shown to be bio-degradable non-toxic small organic compounds.

Synthesis and photoelectric property of N-confused porphyrins bearing an ethynylbenzoic and benzoic acid moiety

2016 ◽  
Vol 43 (5) ◽  
pp. 2921-2929 ◽  
Author(s):  
Nuonuo Zhang ◽  
Jiaqi Chen ◽  
Kai Cheng ◽  
Yujiao Li ◽  
Long Wang ◽  
...  
Keyword(s):  
Benzoic Acid ◽  
Photoelectric Property ◽  
Acid Moiety
Sign in / Sign up

Export Citation Format

Share Document