Study of the reaction of aromatic diamines with di-isocyanates. Catalysts for the reaction—V

Fedotova, O.Ya.; Grozdov, A.G.; Rusinovskaya, I.A.

doi:10.1016/0032-3950(65)90151-6

Polymer Science U.S.S.R.

1965

DOI: 10.1016/0032-3950(65)90151-6

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Study of the reaction of aromatic diamines with di-isocyanates. Catalysts for the reaction—V

O.Ya. Fedotova

A.G. Grozdov

I.A. Rusinovskaya

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1971

1987

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Cited by 2 publications

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“…anisole), triethyl amine or organotin derivatives [29]. Structure I1 is more plausible in these cases.…”

mentioning

confidence: 98%

Study of the Kinetics, Intermediates and Product Distribution in the Synthesis and Decomposition Reactions of Thiourea Derivatives

Vanassche¹,

Hoornaert²

1971

Bulletin des Soc Chimique

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The solvent-effect together with the influence of substituents in the aryl group on the yield of isothiocyanates in the decomposition of N-mono aryl thioureas can partly be explained by solvent-and substituent-effects on a consecutive reaction of two decomposition products amine and isothiocyanate. A more detailed investigation of this step, which is representative for the reaction scheme of thioureas, shows that reactions of aromatic amines with aryl isothiocyanates are characterized by an equilibrium limiting the yield of the product NN' diaryl thiourea. Both amine and product seem to effect about equal catalytic influences on both steps of the equilibrium. From a study of the solvent-effect on the reaction rate, it can be concluded that besides the unspecific factors, polarity and polarisability, also association-effects and catalytic activities of the solvent must be taken into account.The considerable influence of the basicity of the amine on the reaction rate together with the pronounced effect of substituents in the phenyl isothiocyanate shows that the nucleophilic attack of the amine on the isothiocyanate must be the rate determining step; this view is in agreement with the low value for the isotope-effect. The whole of the data can be correlated by assuming a reaction scheme wherein amine attacks the isothiocyanate both as a dimeric form and a monomeric form complexed with reaction product or solvent.

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“…anisole), triethyl amine or organotin derivatives [29]. Structure I1 is more plausible in these cases.…”

mentioning

confidence: 98%

Study of the Kinetics, Intermediates and Product Distribution in the Synthesis and Decomposition Reactions of Thiourea Derivatives

Vanassche¹,

Hoornaert²

1971

Bulletin des Soc Chimique

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Synthesis and characterization of N‐phenylated aromatic polyureas from dianilino compounds and aromatic diisocyanates

Oishi

Kakimoto

Imai

1987

J. Polym. Sci. A Polym. Chem.

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SynopsisN-phenylated aromatic polyureas were synthesized by the polyaddition of dianilino compounds to aromatic diisocyanates in sym-tetrachloroethane at around 100°C. Factors that influence the reaction, such as monomer concentration, reaction solvent, catalyst, temperature, and time, were studied to optimize the conditions for the preparation of high molecular weight polymers. Compared with the analogous unsubstituted aromatic polyureas, the N-phenylated polyureas were almost amorphous and soluble in a variety of solvents and had low glass transition temperatures. Some of the polymers could be cast into transparent flexible films from chloroform solutions.

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Study of the reaction of aromatic diamines with di-isocyanates. Catalysts for the reaction—V

Cited by 2 publications

References 1 publication

Study of the Kinetics, Intermediates and Product Distribution in the Synthesis and Decomposition Reactions of Thiourea Derivatives

Study of the Kinetics, Intermediates and Product Distribution in the Synthesis and Decomposition Reactions of Thiourea Derivatives

Synthesis and characterization of N‐phenylated aromatic polyureas from dianilino compounds and aromatic diisocyanates

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