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147513-93-7

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147513-93-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 147513-93-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,7,5,1 and 3 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 147513-93:
(8*1)+(7*4)+(6*7)+(5*5)+(4*1)+(3*3)+(2*9)+(1*3)=137
137 % 10 = 7
So 147513-93-7 is a valid CAS Registry Number.

147513-93-7Relevant articles and documents

Syntheses and Spectral Characterizations of Tricarbonylchromium Complexes of Calixarenes

Iki, Hideshi,Kikuchi, Taketoshi,Shinkai, Seiji

, p. 205 - 210 (2007/10/02)

The 1:1 arene-tricarbonylchromium complexes were synthesized for the first time from four conformational isomers of 25,26,27,28-tetrapropoxycalixarene (14Pr) and Cr(CO)6.The 1:2, 1:3 and 1:4 complexes of cone-14Pr were also synthesized by increasing the ratio of Cr(CO)6 against cone-14Pr.The 1:2 complex was a mixture of two compounds, which were identified as distal and proximal isomers of cone-14Pr*2Cr(CO)3.The relative stability of the 1:1 complex was estimated via its oxidation by CuCl2.The pseudo-first-order rate constants appeared to be in the order of 1,3-alternate-14Pr > 1,2-alternate-14Pr > cone-14Pr > 2,6-dimethylanisole.The results indicate that the 14r*Cr(CO)3 complexes are less stable than the corresponding monomeric complex.The 1:1 complexes with partial-cone-14Pr and 1,2-alternate-14Pr were demonstrated to be a pair of racemates by 1H NMR spectroscopy using a chiral shift reagent (Pirkle's reagent).

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