1257311-31-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1257311-31-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,3,1 and 1 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1257311-31:
(9*1)+(8*2)+(7*5)+(6*7)+(5*3)+(4*1)+(3*1)+(2*3)+(1*1)=131
131 % 10 = 1
So 1257311-31-1 is a valid CAS Registry Number.
1257311-31-1Relevant articles and documents
Deprotonation and addition reactions of frustrated Lewis pairs with alkynes
Dureen, Meghan A.,Brown, Christopher C.,Stephan, Douglas W.
, p. 6594 - 6607 (2011/02/16)
Deprotonation of terminal alkynes is effected by the treatment with tBu3P and B(C6F5)3 to give [tBu 3PH][PhCCB(C6F5)3] (1a) and [tBu3PH][RCCB(C6F