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573984-25-5

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573984-25-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 573984-25-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,7,3,9,8 and 4 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 573984-25:
(8*5)+(7*7)+(6*3)+(5*9)+(4*8)+(3*4)+(2*2)+(1*5)=205
205 % 10 = 5
So 573984-25-5 is a valid CAS Registry Number.

573984-25-5Relevant articles and documents

Synthesis and structural characterization of divalent ytterbium complexes supported by β-diketiminate ligands and their catalytic activity for the polymerization of methyl methacrylate

Yao, Yingming,Zhang, Yong,Zhang, Zhenqin,Shen, Qi,Yu, Kaibei

, p. 2876 - 2882 (2003)

Three divalent ytterbium complexes supported by a β-diketiminate ligand were synthesized for the first time. The mixed-ligand ytterbium chlorides (CH3C5H4)[(DIPPh)2nacnac]YbCl (1), (C9H7)[(DIPPh)2nacnac]YbCl (2), and (ArO)[(DIPPh)2nacnac]YbCl(THF) (3) ((DIPPh)2nacnac = N,N-diisopropylphenyl-2, 4-pentanediimine anion, ArO = 2,6-di-tert-butyl-4-methylphenoxo), which were obtained in high yield by using [(DIPPh)2nacnac] YbCl2(THF)2 as precursor, were reduced by Na/K alloy in THF to afford the corresponding divalent species (CH3C5H4)[(DIPPh)2nacnac]Yb(THF) (4), (C9H7)[(DIPPh)2nacnac]Yb(THF) (5), and {(ArO)-[(DIPPh)2nacnac]Yb(THF)}(THF) (6), respectively. Complexes 2-6 were well characterized, and crystal structures of complexes 4-6 were determined. These divalent complexes exhibit good catalytic activity for the polymerization of methyl methacrylate.

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