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220113-16-6

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220113-16-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 220113-16-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,1,1 and 3 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 220113-16:
(8*2)+(7*2)+(6*0)+(5*1)+(4*1)+(3*3)+(2*1)+(1*6)=56
56 % 10 = 6
So 220113-16-6 is a valid CAS Registry Number.

220113-16-6Relevant articles and documents

The effect of protonation on the spectroscopic and redox properties of a series of ferrocenoyl derivatives

Carr, Jonathan D.,Coles, Simon J.,Hassan, William W.,Hursthouse, Michael B.,Malik, K. M. Abdul,Tucker, James H. R.

, p. 57 - 62 (1999)

Five ferrocenoyl derivatives, containing pyridine (1-4) and benzene (5) moieties, were synthesised and characterised. The effect on the spectroscopic and redox properties of these compounds upon addition of H+ was studied, with NMR studies indicating that protonation took place at the pyridine nitrogens of 1-4. A crystal structure determination of the bis(amide) derivative 4 revealed the presence of two intramolecular hydrogen bonds; these remained intact in solution but were cleaved upon protonation. Protonation induced anodic shifts in the ferrocene-centred redox potential of ferrocene receptors 1, 2 and 4 and also changes in the electronic and NMR spectra of 1-4. A bathochromic shift in the lowest energy spin-allowed d-d band upon protonation was only observed for those compounds which also displayed a pronounced redox response.

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