Phosgene physical constants

The cyclic analogs of chloroformamidines are virtually unknown. Suzuki mentioned the synthesis of 2-chloroimidazolidine but reported no physical constants. The cyclic chloroformamidinium chloride XXV can be obtained from l,3-dimethylimidazolidine-2-one (XXVI) and carbonyl chloride, but this reaction is considerably slower than the phosgenation of the tetrasubstituted linear urea C ). 

The mechanism of the formation of phosgene according to the reaction, CO (A) + C12(B) =4 C0C12(C), is to be checked with given data at 30.6 C (Potter Baron, CEP 47 473, 1951). Six Langmuir-Hinshelwood equations and a power law model are examined. The rate equations are analyzed in linearized forms. Those that have negative constants are not physically realistic. 

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