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64688-27-3

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64688-27-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 64688-27-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,4,6,8 and 8 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 64688-27:
(7*6)+(6*4)+(5*6)+(4*8)+(3*8)+(2*2)+(1*7)=163
163 % 10 = 3
So 64688-27-3 is a valid CAS Registry Number.

64688-27-3Relevant articles and documents

Spectroscopic analysis of imidazolidines: Part IV:13C-NMR spectroscopy

Perillo, Isabel A.,Buldain, Graciela,Salerno, Alejandra

, p. 2103 - 2113 (2007/10/03)

13C NMR spectra of a series of 1,3-di- and 1,2,3-trisubstituted imidazolidines with aryl, alkyl and aralkyl groups are analyzed and their spectroscopic parameters correlated with conformational features. Assignments were confirmed by means of two dimensional spectra of heteronuclear correlation HMQC and HMBC. Heterocyclic carbons are highly influenced by the nature of the substituent on adjacent nitrogen. Thus, carbon atoms adjacent to a nitrogen substituted with an alkyl or aralkyl group appear in the spectrum at 8 ca. 53 ppm as double doublets with 1JC-H 134 and 145 Hz, due to a definite orientation of the substituent. Instead, carbon atoms adjacent to an N-aryl group appear at higher fields (8 ca. 47 ppm) as triplets with 1JC-H ca 141-143 Hz.

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