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131618-88-7

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131618-88-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131618-88-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,6,1 and 8 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 131618-88:
(8*1)+(7*3)+(6*1)+(5*6)+(4*1)+(3*8)+(2*8)+(1*8)=117
117 % 10 = 7
So 131618-88-7 is a valid CAS Registry Number.

131618-88-7Relevant articles and documents

Zirconium(IV) and Hafnium(IV) Bisporphyrinate Double Deckers: Synthesis, Spectra, Redox Potentials, and Structure

Buchler, Johann W.,Cian, Andre De,Fischer, Jean,Hammerschmitt, Peter,Weiss, Raymond

, p. 1051 - 1058 (2007/10/02)

The synthesis of new zirconium and hafnium bisporphyrinate double deckers M(P)2 (M = Zr, Hf; P = OEP, TPP) is described.The complexes are characterized by UV/Vis/NIR and 1H-NMR spectroscopy and cyclic voltammetry.As compared with M = Ce, the redox potentials or the energies of the near-infrared absorption bands of the corresponding radical cations + are lower by ca. 0.2 V or higher by ca. 2000 cm-1, respectively.Hence, there is a stronger ?-? interaction between the porphyrin ligands as compared with the cerium analogues due to the smaller ionic radii of Zr(IV) and Hf(IV).X-ray crystallography of Zr(TPP)2 confirms the san dwich-like structure of the compound and the close proximity of the porphyrin ligands.

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