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228259-91-4

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228259-91-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 228259-91-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,8,2,5 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 228259-91:
(8*2)+(7*2)+(6*8)+(5*2)+(4*5)+(3*9)+(2*9)+(1*1)=154
154 % 10 = 4
So 228259-91-4 is a valid CAS Registry Number.

228259-91-4Relevant articles and documents

Synthesis, characterization and biological activity of (Z)-1-[2]-1-cyclopentanol and their arylhalostannyl derivatives

Dai, Hui Cong,Ying, Qihua,Wang, Xiao Hong,Yue, Su Mei,Pan, Hua De,Chen, Xi

, p. 2503 - 2509 (2008/10/09)

The synthesis and characterization by elemental analysis, IR and 1H NMR of (Z)-1 - 1-cyclopentanol,CH2(CH2)3C(OH)CHCHSnPh 3 (1) and (Z)-1 - 1-cyclopentanol, CH2(CH2)3C(OH)CHCHSn(p-toly)3 (2) are described, together with their halodemetallation by I2, Br2 and ICl to yield derivatives of the types CH2(CH2)3C(OH)CHCHSnAr3-nX n (Ar = phenyl or p-tolyl ; n = 1, 2 ; X = I, Br, Cl). The solid-state structures of two compounds have been determined by X-ray diffraction analysis. In the crystal of CH2(CH2)3C(OH)CHCHSnph3 (1) the Sn atom has a distorted tetrahedral geometry but intramolecular contact with the hydroxyl O atom has not been found. A trigonal bipyramidal geometry is found in CH2(CH2)3CC(OH)CHCH SnphBr2(11), in which OSn - interaction is noted [2.446(8) A] The biological activity of the title complexes is also investigated.

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