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344416-23-5

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344416-23-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 344416-23-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,4,4,1 and 6 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 344416-23:
(8*3)+(7*4)+(6*4)+(5*4)+(4*1)+(3*6)+(2*2)+(1*3)=125
125 % 10 = 5
So 344416-23-5 is a valid CAS Registry Number.

344416-23-5Downstream Products

344416-23-5Relevant articles and documents

Structural and chemosensor properties of FDA and FDP derivatives of fluorenylidene bridged cyclotetraphosphazenes

?enkuytu, Elif,?ift?i, G?nül Yenilmez

, p. 247 - 256 (2016)

The first series of 4,4′-(9-fluorenylidene)diphenol (FDP) (5) and 4,4′-(9-fluorenylidene)dianiline (FDA) (6) bridged and open chained cyclotetraphosphazene derivatives (15-23) have been synthesized. Their florescence and chemosensor properties are reported. Nucleophilic substitution reactions of octachlorocyclotetraphosphazene (1) with mono-functional reagents [phenol (2), 2-naphthol (3) and 1-hydroxypyrene (4)] were carried out and the heptasubstituted derivatives (8, 11 and 14) were obtained. Then the reactions of 8, 11 and 14 with 4,4′-(9-fluorenylidene)diphenol (FDP) (5) and 4,4′-(9-fluorenylidene)dianiline (FDA) (6), respectively gave bridged and open chained compounds. The structures of the synthesized compounds (7-23) were verified by elemental analyses, mass spectrometry, UV Vis, 1H and 31P NMR techniques and fluorescence spectroscopy. The metal sensing properties of the novel bridged open chain cyclotetraphosphazene derivatives were also examined by fluorescence spectroscopy. These complexes showed high selectivity for Cu2+ and Fe3+ ions in solution.

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