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16489-03-5

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16489-03-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16489-03-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,4,8 and 9 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 16489-03:
(7*1)+(6*6)+(5*4)+(4*8)+(3*9)+(2*0)+(1*3)=125
125 % 10 = 5
So 16489-03-5 is a valid CAS Registry Number.

16489-03-5Downstream Products

16489-03-5Relevant articles and documents

Selective Isomerization of Terminal Alkenes to (Z)-2-Alkenes Catalyzed by an Air-Stable Molybdenum(0) Complex

Becica, Joseph,Glaze, Owen D.,Wozniak, Derek I.,Dobereiner, Graham E.

, p. 482 - 490 (2018/02/17)

Positional and stereochemical selectivity in the isomerization of terminal alkenes to internal alkenes is observed using the cis-Mo(CO)4(PPh3)2 precatalyst. A p-toluenesulfonic acid (TsOH) cocatalyst is essential for catalyst activity. Various functionalized terminal alkenes have been converted to the corresponding 2-alkenes, generally favoring the Z isomer with selectivity as high as 8:1 Z:E at high conversion. Interrogation of the catalyst initiation mechanism by 31P NMR reveals that cis-Mo(CO)4(PPh3)2 reacts with TsOH at elevated temperatures to yield a phosphine-ligated Mo hydride (MoH) species. Catalysis may proceed via 2,1-insertion of a terminal alkene into a MoH group and stereoselective β-hydride elimination to yield the (Z)-2-alkene.

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