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99277-30-2

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99277-30-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99277-30-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,2,7 and 7 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 99277-30:
(7*9)+(6*9)+(5*2)+(4*7)+(3*7)+(2*3)+(1*0)=182
182 % 10 = 2
So 99277-30-2 is a valid CAS Registry Number.

99277-30-2Downstream Products

99277-30-2Relevant articles and documents

Investigation of Spin Density Transfer into Cyclopropyl and Cyclohexyl Groups by ENDOR and TRIPLE Resonance, INDO and MINDO/3 Calculations

Kirste, Burkhard,Broser, Waldemar,Grain, Kornelia,Kurreck, Harry,Schloemp, Gerhard

, p. 3464 - 3480 (2007/10/02)

By performing EPR, ENDOR, and TRIPLE experiments on the 1-cyclopropyl- and 1-cyclohexylphenalenyl radicals as well as the radical anions of 9-cyclopropyl- and 9-cyclohexylanthracene the hyperfine coupling constants, including their signs, were determined.An attempt was made to determine the optimum geometries of these radicals or of model systems by MINDO/3 caclculations.The dependence of the potential functions as well as the hyperfine coupling constants of the radicals on the dihedral angle between the cycloalkyl group and the ?-system were calculated by the INDO method.Conclusions with respect to the preferred conformations and the mechanism of spin density transfer into the cycloalkyl groups were drawn from a comparison with the experimental data.The hindrance of free rotation of the cycloalkyl groups is mainly caused by steric interactions with hydrogen atoms in peri-positions.Whereas the two ring systems are oriented almost perpendicular to each other in the radical anion of 9-cyclohexylanthracene, the eclipsed conformation is preferred in the corresponding cyclopropyl compound.

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