57813-58-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57813-58-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,8,1 and 3 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 57813-58:
(7*5)+(6*7)+(5*8)+(4*1)+(3*3)+(2*5)+(1*8)=148
148 % 10 = 8
So 57813-58-8 is a valid CAS Registry Number.
57813-58-8Relevant articles and documents
SYNTHESIS AND REACTIVITY OF A NEW 1,1-DIPHENYL 2,5-DIHYDROPHOSPHOLIUM SALT
Cristau, H.-J.,Grenier, J.,Torreilles, E.
, p. 163 - 172 (2007/10/02)
We describe the first synthesis of an unsaturated cyclic diphenyl phosphoium salt of type 2, the 1,1-diphenyl 2,5-dihydrophospholium salt 2d.The method involves a cyclo-addition of the diphenyl halophosphine to the corresponding diene.The salt 2d allowed