51689-29-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 51689-29-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,6,8 and 9 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 51689-29:
(7*5)+(6*1)+(5*6)+(4*8)+(3*9)+(2*2)+(1*9)=143
143 % 10 = 3
So 51689-29-3 is a valid CAS Registry Number.
51689-29-3Relevant articles and documents
Oxidative coupling of 7,7-dilithionorbornane; 7,7′-dilithio-7,7′-dinorbornyl, a new vic-dilithioalkane prone to a new mode of decomposition
Vlaar, Cornelis P.,Klumpp, Gerhard W.
, p. 4651 - 4654 (2007/10/02)
7,7-Dilithionorbornane reacts with butyl halides at -100°C to give 7,7′-dilithio-7,7′-dinorbornyl (30%), which is easily oxidized to 7,7′-dinorbornylidene.