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66507-25-3

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66507-25-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 66507-25-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,5,0 and 7 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 66507-25:
(7*6)+(6*6)+(5*5)+(4*0)+(3*7)+(2*2)+(1*5)=133
133 % 10 = 3
So 66507-25-3 is a valid CAS Registry Number.

66507-25-3Relevant articles and documents

The lithiation of ferrocene and ruthenocene: A retraction and an improvement

Sanders, Richard,Mueller-Westerhoff, Ulrich T.

, p. 219 - 224 (1996)

We reported in 1993 an efficient synthesis of ferrocene and ruthenocene mono-and dialdehydes which suggested the first truly specific monolithiation of these two metallocenes (U.T. Mueller-Westerhoff, Z. Yang and G. Ingram, J. Organomet. Chem., 463 (1993) 163). Unfortunately, these results were based on inappropriate experimental methods. We have now meticulously analyzed a wide spread of reaction conditions and have concluded that an effective monolithiation of ferrocene and of ruthenocene is possible, but not under the previously described reaction conditions.

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