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678986-05-5

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678986-05-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 678986-05-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,7,8,9,8 and 6 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 678986-05:
(8*6)+(7*7)+(6*8)+(5*9)+(4*8)+(3*6)+(2*0)+(1*5)=245
245 % 10 = 5
So 678986-05-5 is a valid CAS Registry Number.

678986-05-5Downstream Products

678986-05-5Relevant articles and documents

Bis(amido)titanium complexes having chelating diaryloxo ligands bridged by sulfur or methylene and their catalytic behaviors for ring-opening polymerization of cyclic esters

Takashima, Yoshinori,Nakayama, Yuushou,Hirao, Toshikazu,Yasuda, Hajime,Harada, Akira

, p. 612 - 619 (2004)

A series of bis(dialkylamido) titanium complexes coordinated by O-E-O (E=S, CH2) chelating bis(aryloxo) ligands, Ti[E(4-Me-6-tBuC6H2O)2] (NR2)2 (1: E=S, R=Me; 2: E=S, R=Et; 3: E=CH2, R=Me; 4: E=CH2, R=Et), were synthesized by the reaction of Ti(NR2) 4 (R=Me, Et) with 2,2′-E(4-Me-6- tBuC6H2OH)2 (E=S, CH2). The crystal structures of complexes 2 and 4 were determined by X-ray diffraction study. Complex 2 has a trigonal bipyramidal structure with the sulfur and nitrogen atom in trans positions and complex 4 has a tetrahedral structure. The complex 2 was found to initiate the controlled polymerization of E-caprolactone in toluene at 100 °C affording poly(E-caprolactone) and poly(l-lactide) with relatively narrow molecular weight distributions. The complex 4 showed higher activity for the polymerization of E-caprolactone to give a polymer with a broader molecular weight distribution in comparison with complex 2.

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