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67951-97-7

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67951-97-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 67951-97-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,9,5 and 1 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 67951-97:
(7*6)+(6*7)+(5*9)+(4*5)+(3*1)+(2*9)+(1*7)=177
177 % 10 = 7
So 67951-97-7 is a valid CAS Registry Number.

67951-97-7Relevant articles and documents

Thioketene Syntheses, VIII. - Thioketenes by Cycloreversion of 1,3-Dithiolane Derivatives

Schaumann, Ernst,Scheiblich, Stefan,Wriede, Ulrich,Adiwidjaja, Gunadi

, p. 1165 - 1176 (2007/10/02)

2-Alkylidene-1,3-dithiolanes are transformed into S,S-dioxides 1 and S-ethyl- 2 or S-arylsulfonium salts 3.After deprotonation at C-5 they form in a cycloreversion thioketenes 5, which can be trapped as thioamides 17, 18.The stabilized thioketenes 5e,i-k afford 1:1 cycloadducts 24a, b, 27a-d with azomethines; in addition, thioketene 5j provides a dimer 28j, which was characterized by an X-ray structural investigation.

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