Aromatic sulphonation. Part XXXVI. The sulphuric acid sulphonation of some o-dialkylbenzenes, benzocycloalkenes, and their 4-sulphonic acids. Formation of polyxylylene from benzocyclobutene

Cerfontain, H.; Nienhuis, Z. R. H.; Voorspuy, W. A. Zwart

doi:10.1039/p29720002087

Cited by 5 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We recently obtained a satisfactory quantitative analysis of a large number of mixtures of isomeric arenesulfonic acids by PMR spectrometric analysis without requiring the constituents themselves as reference compounds (6)(7)(8)(9)(10)(11)(12). The isomeric composition of mixtures obtained on sulfonation of disubstituted (6,(9)(10)(11) and trisubstituted (11) benzene derivatives was determined on the basis of the aromatic hydrogen pattern, in conjunction with the absorption pattern of the benzyl hydrogens, if present. With a sulfonation mixture of a monosubstituted benzene derivative, the relative abundance of at least one of the three isomers can often be determined (13,14).…”

Section: Quantitative Nuclear Magnetic Resonance Analysis Of Mixtures...mentioning

confidence: 99%

Quantitave nuclear magnetic resonance analysis of mixtures of isomeric arenesulfonic acids in sulfonation mixtures

Cerfontain¹,

Koeberg-Telder²,

Kruk³

et al. 1974

Anal. Chem.

View full text Add to dashboard Cite

contrast, the silicon-to-gallium count ratio did respond to change in aspiration rate of gallium solution but showed an insensitivity similar to the silicon-to-aluminum ratio above a critical aspiration rate of approximately 1 ml/ min. The relative standard deviation was 6.0% for flows of 1.0 to 2.48 ml/min. Matrix Effects. Matrix effects in spark analysis have been studied previously; however, matrix effects, especially interelement effects, are generally treated empirically. The recent use of atmospheres other than air (14-16) tends to reduce surface oxidation, which has been shown to account for some matrix effects ( 17), but the liquid layer technique offers another approach.For determination of silicon in aluminum alloys, a single analytical curve obtained by using the liquid layer technique replaced a number of analytical curves required without the liquid layer. The curves in Figure 10 are ex-(16) C. K.

show abstract

Section: Quantitative Nuclear Magnetic Resonance Analysis Of Mixtures...mentioning

confidence: 99%

Quantitave nuclear magnetic resonance analysis of mixtures of isomeric arenesulfonic acids in sulfonation mixtures

Cerfontain¹,

Koeberg-Telder²,

Kruk³

et al. 1974

Anal. Chem.

View full text Add to dashboard Cite

show abstract

ChemInform Abstract: AROMATISCHE SULFONIERUNG 36. MITT. SULFONIERUNG VON O‐DIALKYL‐BENZOLEN, BENZOCYCLOALKENEN UND DEREN 4‐SULFONSAEUREN MIT SCHWEFELSAEURE, BLDG. VON POLYXYLYLEN AUS BENZOCYCLOBUTEN

Cerfontain¹,

Nienhuis²,

Voorspuy³

1973

Chemischer Informationsdienst

View full text Add to dashboard Cite

show abstract

Aromatic sulfonation 85. Halogen directing and steric effects in the sulfonation of the twelve halogenotoluenes and some related compounds

Cerfontain

Koeberg-Telder

Laali

et al. 1982

Recl. Trav. Chim. Pays‐Bas

View full text Add to dashboard Cite

Abstract. The isomer distributions for the sulfonation of the twelve halogenotoluenes and some trisubstituted halogenomethylbenzenes, with both 98.4% H,SO, at 25°C and sulfur trioxide in nitromethane at O"C, have been determined and found to be very similar. The predominantly para-directing effect of the halogen substituent dominates over that of the methyl substituent: with the 2-halogenotoluenes, the degree of 5-substitution decreases from 2 9 0 % for the fluoro to 50% for the iodo compound. The 2-to 3-sulfonation ratio of the 4-halogenotoluenes strongly increases on going from fluorine (0.5) to iodine (7). The ratio of the partial rate factors for the sulfonation of a halogenobenzene ortho and meta to halogen varies from 17 1 for the fluoro to 1.5 $ -0.4 for the iodo substituent. In competition to the sulfonation, 2-and 4-iodotoluene undergo deiodination. The latter process is more important with the 4-isomer and with the protic sulfonating reagent. With the aprotic reagent, the reaction proceeds by direct sulfodeiodination, whereas with the sulfuric acid reagent, it proceeds by initial protiodeiodination and subsequent sulfodeprotonation.

show abstract

Aromatic sulphonation. Part XXXVI. The sulphuric acid sulphonation of some o-dialkylbenzenes, benzocycloalkenes, and their 4-sulphonic acids. Formation of polyxylylene from benzocyclobutene

Cited by 5 publications

References 0 publications

Quantitave nuclear magnetic resonance analysis of mixtures of isomeric arenesulfonic acids in sulfonation mixtures

Quantitave nuclear magnetic resonance analysis of mixtures of isomeric arenesulfonic acids in sulfonation mixtures

ChemInform Abstract: AROMATISCHE SULFONIERUNG 36. MITT. SULFONIERUNG VON O‐DIALKYL‐BENZOLEN, BENZOCYCLOALKENEN UND DEREN 4‐SULFONSAEUREN MIT SCHWEFELSAEURE, BLDG. VON POLYXYLYLEN AUS BENZOCYCLOBUTEN

Aromatic sulfonation 85. Halogen directing and steric effects in the sulfonation of the twelve halogenotoluenes and some related compounds

Contact Info

Product

Resources

About