CAS No.138-42-1,Benzenesulfonic acid,4-nitro- Suppliers,MSDS download

Detail of "138-42-1"

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CAS Number:

138-42-1

Name:

Benzenesulfonic acid,4-nitro-

Superlist Name:

4-Nitrobenzenesulfonic acid

Molecular Structure:

Formula:

C₆H₅NO₅S

Molecular Weight:

203.17

Synonyms:

Benzenesulfonicacid, p-nitro- (6CI,7CI,8CI);4-Nitrophenylsulfonic acid;NSC 5376;p-Nitrobenzenesulfonic acid;p-Nitrophenylsulfonic acid;

EINECS:

205-329-5

Density:

1.637 g/cm³

Melting Point:

105-112 °C

Appearance:

beige to yellow-orange crystalline powder

Hazard Symbols:

Xi,

Risk Codes:

36/37/38

Safety:

37/39-26 Details

Transport Information:

UN 2305

Reference

Lanthanide(III) nitrobenzenesulfonates as new nitration catalysts: The role of the metal and of the counterion in the catalytic efficiency: Parac-Vogt, Tatjana N.Some chemicals with cas registry numbers like 695154-03-1 and 138-42-1 are also used.; Pachini, Sophia; Nockemann, Peter; Van Hecke, Kristof; Van Meervelt, Luc; Binnemans, Koen (Katholieke Universiteit Leuven, Department of Chemistry, Louvain 3001, Belg.). European Journal of Organic Chemistry, (22), 4560-4566 (English) 2004 Wiley-VCH Verlag GmbH & Co. KGaA. CODEN: EJOCFK. ISSN: 1434-193X. DOCUMENT TYPE: Journal CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Section cross-reference(s): 25, 67, 75 Lanthanide(III) complexes of p-nitrobenzenesulfonic acid, Ln(p-NBSA)3, m-nitrobenzenesulfonic acid, Ln(m-NBSA)3, and 2,4-nitrobenzenesulfonic acid, Ln(2,4-NBSA)3, were prepd., characterized and examd. as catalyst for the nitration of benzene, toluene, xylenes, naphthalene, bromobenzene and chlorobenzene. The initial screening of the catalysts showed that lanthanum(III) complexes were more effective than the corresponding ytterbium(III) complexes, and that catalysts contg. the bulky 2,4-NBSA ligand were less effective than the catalyst contg. p-NBSA (nosylate) or m-NBSA ligands. Examn. of a series of Ln(p-NBSA)3 and Ln(m-NBSA)3 catalysts revealed that there is a clear correlation between the ionic radii of the lanthanide(III) ions and the yields of nitration, with the lighter lanthanides being more effective. The X-ray single crystal structure of Yb(m-NBSA)3×6H2O shows that two m-NBSA ligands are directly bound to the metal center while the third ligand is not located in the first coordination sphere, but it is hydrogen bonded to one of the water mols. which is coordinated to ytterbium(III). NMR studies suggest that this structure is preserved under the conditions used in the nitration reaction. The structure of Yb(m-NBSA)3 is markedly different from the structure of the well-known ytterbium(III) triflate catalyst. The coordination of the nitrobenzenesulfonate counterion to the lanthanide(III) ion suggests that steric effects might play an important role in detg. the efficiency of these novel nitration catalysts. .

Detail of "138-42-1"

Benzenesulfonic acid,4-nitro-

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CAS No.138-42-1 4-Nitrobenzenesulfonic acid

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CAS No.138-42-1 4-Nitrobenzenesulfonic acid

CAS No.138-42-1 4-Nitrobenzenesulfonic acid

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CAS No.138-42-1 4-Nitrobenzenesulfonic acid

CAS No.138-42-1 4-Nitrobenzenesulfonic acid

CAS No.138-42-1 4-Nitrobenzenesulfonic acid

CAS No.138-42-1 4-Nitrobenzenesulfonic acid

CAS No.138-42-1 4-Nitrobenzenesulfonic acid

CAS No.138-42-1 4-Nitrobenzenesulfonic acid

CAS No.138-42-1 4-Nitrobenzenesulfonic acid

CAS No.138-42-1 4-Nitrobenzenesulfonic acid

CAS No.138-42-1 4-Nitrobenzenesulfonic acid

CAS No.138-42-1 4-Nitrobenzenesulfonic acid

Reference