557772-56-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 557772-56-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,7,7,7 and 2 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 557772-56:
(8*5)+(7*5)+(6*7)+(5*7)+(4*7)+(3*2)+(2*5)+(1*6)=202
202 % 10 = 2
So 557772-56-2 is a valid CAS Registry Number.
557772-56-2Relevant academic research and scientific papers
Addition of diazoalkanes to alkyne(pentacarbonyl)-chromium and -tungsten - Formation of 3H-pyrazole complexes
Abd-Elzaher, Mokhles M.,Weibert, Bernhard,Fischer, Helmut
, p. 6 - 13 (2007/10/03)
Photolysis of [M(CO)6] (M=Cr, W) in CH2Cl2 at -78 °C generates [(CO)5M(CH2Cl2)]. Subsequent sequential reaction of [(CO)5M(CH2Cl2)] with terminal alkynes, H
