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1250377-17-3

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1250377-17-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1250377-17-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,0,3,7 and 7 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1250377-17:
(9*1)+(8*2)+(7*5)+(6*0)+(5*3)+(4*7)+(3*7)+(2*1)+(1*7)=133
133 % 10 = 3
So 1250377-17-3 is a valid CAS Registry Number.

1250377-17-3Relevant articles and documents

Substitution reactions at tetracoordinate boron: Synthesis of N-heterocyclic carbene boranes with boron-heteroatom bonds

Solovyev, Andrey,Chu, Qianli,Geib, Steven J.,Fensterbank, Louis,Malacria, Max,Lacote, Emmanuel,Curran, Dennis P.

, p. 15072 - 15080 (2010)

Boryl halide, carboxylate and sulfonate complexes of 1,3-bis(2,6- diisopropylphenyl)imidazol-2-ylidene (dipp-Imd-BH2X, X = halide or sulfonate) have been prepared from the parent borane dipp-Imd-BH3 by (1) substitution reactions with R-X (X = halide or sulfonate), (2) reactions with electrophiles (like I2 or NIS), or (3) acid/base reactions with HX (provided that HX has a pKa of about 2 or less). Dipp-Imd-BH 2I is most conveniently prepared by reaction with diiodine while dipp-Imd-BH2OTf is best prepared by reaction with triflic acid. These and other less reactive complexes behave as electrophiles and can be substituted by a wide range of heteroatom nucleophiles including halides, thiolates and other sulfur-based nucleophiles, isocyanate, azide, nitrite, and cyanide. The resulting products are remarkably stable, and many have been characterized by X-ray crystallography. Several are members of very rare classes of functionalized boron compounds (boron azide, nitro compound, nitrous ester, etc.).

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