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148203-92-3

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148203-92-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 148203-92-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,8,2,0 and 3 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 148203-92:
(8*1)+(7*4)+(6*8)+(5*2)+(4*0)+(3*3)+(2*9)+(1*2)=123
123 % 10 = 3
So 148203-92-3 is a valid CAS Registry Number.

148203-92-3Downstream Products

148203-92-3Relevant articles and documents

Cyclic Organotin Lewis Acids

Vedejs, E.,Erdman, D. E.,Powell, D. R.

, p. 2840 - 2845 (1993)

The Ph3P=O IR frequency shift method has been used to compare the Lewis acid strength of several cyclic organotin dichlorides.Structures 3, 20, and 4 are relatively weak Lewis acids, less potent than Bu2SnCl2, according to the IR criterion.Steric factors appear largely responsible for the decreased Lewis acidity, altough bond angle strain may also contribute in the case of 3.Introduction of electronegative substituents into the aromatic ring of structures related to 4 results in stronger Lewis acids 8 and 18, both of which are relatively more potent than Ph2SnCl2.Methods for the preparation of precursors to the fluorinated 8 and 18 are described, based on the deprotonation of tetrafluoroaryl precursors.

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