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137680-51-4

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137680-51-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137680-51-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,6,8 and 0 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 137680-51:
(8*1)+(7*3)+(6*7)+(5*6)+(4*8)+(3*0)+(2*5)+(1*1)=144
144 % 10 = 4
So 137680-51-4 is a valid CAS Registry Number.

137680-51-4Downstream Products

137680-51-4Relevant articles and documents

Reaction of (Ph2PCl)> with (Me3Si)2Se. The Crystal Structures of 2Se>, (Ph2P)2Se> and (Ph2P)2Se>

Merzweiler, Kurt,Kersten, Hans-Joerg

, p. 1025 - 1030 (2007/10/02)

Phosphorus, Selenium, Chromium Complexes, Crystal Structure The reaction of (Ph2PCl)> with (Me3Si)2Se in toluene at 298 K leads to the compounds 2Se> (1) and (Ph2P)2Se> (2).If the reaction is carried out in ether as solvent at 308 K, (Ph2P)2Se> (3) is obtained.The structures of 1, 2 and 3 were determined by single crystal X-ray analysis. 1, 2 and 3 contain the Ph2PSePPh2 ligand, which is coordinated to chromium carbonyl fragments in three different ways. 1 consists of a dinuclear complex in which two fragments are linked by a Ph2PSePPh2 group.In 2, only one phosphorus atom of the Ph2PSePPh2 ligand is bound to a unit.In 3, the Ph2PSePPh2 group is coordinated as a chelate ligand to a fragment.

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