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134940-41-3

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134940-41-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134940-41-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,9,4 and 0 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 134940-41:
(8*1)+(7*3)+(6*4)+(5*9)+(4*4)+(3*0)+(2*4)+(1*1)=123
123 % 10 = 3
So 134940-41-3 is a valid CAS Registry Number.

134940-41-3Downstream Products

134940-41-3Relevant articles and documents

Azobenzene-Based Photoswitchable Catenanes

Bauer, Martin,Mueller, Walter Manfred,Mueller, Ute,Rissanen, Kari,Voegtle, Fritz

, p. 649 - 656 (2007/10/02)

Four catenanes (1-4) and the corresponding tetracationic monocycles 5-8 are synthesized.X-ray structural analyses allow a prediction of the mobility (circumrotation) of the "interlocked" rings in the catenanes. which is proven by 1H-NMR spectroscopy.An unexpected order in the crystal packing of 6 is demonstrated. (E/Z) isomerization in one ring influences the second ring of 1-4 and inversely.An existing obstacle inside the cavity of the switchable macrocycle can block this isomerization completely. - Key Words: Catenanes / Interlocked rings / Mechanical bond / Photoswitches

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