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1203350-99-5

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1203350-99-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1203350-99-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,0,3,3,5 and 0 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1203350-99:
(9*1)+(8*2)+(7*0)+(6*3)+(5*3)+(4*5)+(3*0)+(2*9)+(1*9)=105
105 % 10 = 5
So 1203350-99-5 is a valid CAS Registry Number.

1203350-99-5Downstream Products

1203350-99-5Relevant articles and documents

Synthesis and structural characterization of aluminum complexes supported by NNO-tridentate ketiminate ligands: Efficient catalysts for ring-opening polymerization of l-lactide

Chuang, Hui-Ju,Su, Yu-Chu,Ko, Bao-Tsan,Lin, Chu-Chieh

, p. 38 - 42 (2012)

Four NNO-tridentate ketiminate derivatives (HL-H, FL-H, OMeL-H and tBuL-H) were prepared through the condensation reaction of 1-(4-chlorophenyl)-4-(4-X-benzoyl)-3-methyl-1H- pyrazol-5(4H)-one (X = H, F, OMe, tBu) with N,N-dimethylenediamine (1.1 molar equiv) under reflux condition. Further reaction of AlMe3 (1.2 molar equiv) with HL-H, FL-H, OMeL-H and tBuL-H, respectively, affords penta-coordinated mono-adduct aluminum complexes [(HL)AlMe2] (1), [(FL)AlMe 2] (2), [(OMeL)AlMe2] (3), and [( tBuL)AlMe2] (4) in high yield. Experimental results indicate complexes 1-4 are active catalysts for ring-opening polymerization of l-lactide (l-LA) in the presence of benzyl alcohol (BnOH). Al complex 2 catalyzes efficiently not only in a "living" fashion but also an "immortal" manner, giving polymers with the expected molecular weights and narrow PDIs.

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