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1221971-68-1

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1221971-68-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1221971-68-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,1,9,7 and 1 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1221971-68:
(9*1)+(8*2)+(7*2)+(6*1)+(5*9)+(4*7)+(3*1)+(2*6)+(1*8)=141
141 % 10 = 1
So 1221971-68-1 is a valid CAS Registry Number.

1221971-68-1Relevant articles and documents

Coordination and reactivity of white phosphorus and tetraphosphorus trisulphide in the presence of the fragment CpFe(dppe) [dppe = 1,2-bis(diphenylphosphino)ethane]

Di Vaira, Massimo,Peruzzini, Maurizio,Costantini, Stefano Seniori,Stoppioni, Piero

, p. 816 - 820 (2010)

The reaction of [CpFe(dppe)Cl] (1) [dppe = 1,2-bis(diphenylphosphino)ethane] with one equivalent of P4 or P4S3 in the presence of a chloride scavenger, TlPF6 or AgOTf (OTf = triflate, OSO2CF3), affords the complexes [CpFe(dppe)(η1-P4)]PF6 (2) and [CpFe(dppe)(η1-Pbasal-P4S3)]OTf (3) which contain the tetrahedral P4 and the mixed P4S3 cage molecule η1-bound to the metal. Both P4 and P4S3 yield furthermore the dimetal compounds [{CpFe(dppe)}2(μ,η1:1-P4)](PF6)2 (4) and [{CpFe(dppe)}2(μ,η1:1-Papical-Pbasal-P4S3)](OTf)2 (5), which contain the tetrahedral P4 or the mixed-cage P4S3 molecule tethering two ruthenium fragments via two phosphorus atoms. All the compounds have been characterized by elemental analyses and NMR measurements. The crystal structure of 4 has been determined by X-ray diffraction methods. The complexes readily react with excess water under mild reaction conditions and the outcoming products have been identified.

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