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143885-02-3

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143885-02-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143885-02-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,8,8 and 5 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 143885-02:
(8*1)+(7*4)+(6*3)+(5*8)+(4*8)+(3*5)+(2*0)+(1*2)=143
143 % 10 = 3
So 143885-02-3 is a valid CAS Registry Number.

143885-02-3Relevant articles and documents

Synthesis, Structure, and Thermolysis Mechanism of S-Alkoxythiazynes

Yoshimura, Toshiaki,Ohkubo, Masanori,Fujii, Takayoshi,Kita, Hiroshi,Wakai, Youko,Ono, Shin,Morita, Hiroyuki,Shimasaki, Choichiro,Horn, Ernst

, p. 1629 - 1637 (2007/10/03)

S-Alkoxy-S,S-diarylthiazynes were prepared by two methods: the alkaline hydrolysis of S,S-diaryl-N-halosulfilimines in aqueous alcohols and the reaction of S,S-diaryl-S-fluorothiazynes with sodium alkoxides. The structure of S,S-diphenyl-S-propoxythiazyne was determined by an X-ray crystallographic analysis, which showed a short SN bond length of 1.441(3) A. The thermolysis of S-alkoxythiazynes gave elimination products, which were identified as the corresponding carbonyl compounds and N-unsubstituted S,S-diarylsulfilimines. Kinetic experiments for the thermolysis of the S-alkoxy-S,S-diarylthiazynes were carried out. The first-order kinetic behavior, a large kinetic isotope effect (kHkD = 6.1 ) using S,S-diphenyl-S-[1,1-2H2]propoxythiazyne, a negative activation entropy (ΔS? = -30 J K-1mol-1), and a negative Hammett ρ-value (ρ= -0.35) on the phenyl group were obtained, suggesting that the reaction proceeds via a concerted five-membered cyclic transition state. A deviation from the ideal concerted transition state is discussed in comparison with that for sulfoxides.

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