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209606-23-5

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209606-23-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 209606-23-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,9,6,0 and 6 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 209606-23:
(8*2)+(7*0)+(6*9)+(5*6)+(4*0)+(3*6)+(2*2)+(1*3)=125
125 % 10 = 5
So 209606-23-5 is a valid CAS Registry Number.

209606-23-5Relevant articles and documents

Preparation, characterisation and reactivity of a series of classical and non-classical rhenium hydride complexes

Albertin, Gabriele,Antoniutti, Stefano,Garcia-Fontan, Soledad,Carballo, Rosa,Padoan, Fabio

, p. 2071 - 2081 (2007/10/03)

Hydride complexes [ReH(CO)4L] 1, [ReH(CO)3L2] 2, [ReH(CO)2L3] 3 and [ReH(CO)L4] 4 [L = P(OEt)3 a, PPh(OEt)2 b, PPh2(OEt) c or PPh2(OMe) d] were prepared by treating [ReH(CO)5] with the appropriate phosphite under UV irradiation or reflux. The complexes were characterised by IR, 1H, 13C and 31P NMR spectroscopy and by crystal structure determinations of 1d and 1A. Protonation of the monocarbonyls [ReH(CO)L4] 4 in CD2Cl2 with HBF4·Et2O resulted in an equilibrium mixture of the classical dihydride complexes [ReH2(CO)L4]+BF4- and their non-classical tautomers [Re(η2-H2)(CO)L4]+BF 4-. The dihydride [ReH2(CO){PPh(OEt)2}4]BPh4 was also isolated as a solid by protonation of [ReH(CO){PPh(OEt)2}4] in ethanol. Thermally unstable [Re(η2-H2)(CO)4L]+, [Re(η2-H2)(CO)3L2]+ and [Re(η2-H2)(CO)2L3]+ 7 cations were also prepared by protonation of the corresponding monohydrides 1, 2 and 3 and fully characterised in solution. The unsaturated complexes [Re(CO)2L3]BPh4 and [Re(CO)L4]BPh4 11 and the triflate [Re(η1-OSO2CF3)(CO)3L 2] were obtained from the η2-H2 derivatives by evolution of H2. The new complexes [Re(C≡CPh)(CO)3L2], [Re(C≡CPh)(CO)L4] 13, [Re(4-MeC6H4CN)(CO)2L3]BPh 4, [Re(4-MeC6H4NC)(CO)2L3]BPh 4 and [Re(4-MeC6H4NC)(CO)L4]BPh4 were prepared by treating the triflate compounds or the unsaturated compounds [Re(CO)2L3]BPh4 and [Re(CO)L4]BPh4 with Li+C≡CPh- or with the appropriate ligand.

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