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1207685-07-1

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1207685-07-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1207685-07-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,0,7,6,8 and 5 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1207685-07:
(9*1)+(8*2)+(7*0)+(6*7)+(5*6)+(4*8)+(3*5)+(2*0)+(1*7)=151
151 % 10 = 1
So 1207685-07-1 is a valid CAS Registry Number.

1207685-07-1Relevant articles and documents

Synthesis and inclusion properties of pillar[n]arenes

Kou, Yuhui,Cao, Derong,Tao, Hongqi,Wang, Lingyun,Liang, Jianquan,Chen, Zhizhao,Meier, Herbert

, p. 279 - 289 (2014/01/06)

A detailed study of the reaction conditions revealed that a quantitative cyclocondensation of 1,4-dialkoxy-2,5-bis(alkoxymethyl)-benzenes to pillar[n]arenes can be achieved by catalysis of p-toluenesulfonic acid in CH2Cl2. Major product of this new reaction is in each case a cyclopentamer (n = 5), but small amounts of the pillar[n]arenes with n = 6, 7 and 10 can be obtained as well. Different alkoxy groups in 1- and 4-position lead to regioisomers. All cyclooligomers exist in pillar structures as pair of enantiomers, which show a racemisation at room temperature, which is fast in terms of the NMR time scale. The racemisation process occurs by rotation of the 1,4-phenylene segments in the macrocyclic rings. Pillar[n]arenes exhibit novel host-guest behavior. Springer Science+Business Media B.V. 2012.

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