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27857-02-9

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27857-02-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 27857-02-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,7,8,5 and 7 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 27857-02:
(7*2)+(6*7)+(5*8)+(4*5)+(3*7)+(2*0)+(1*2)=139
139 % 10 = 9
So 27857-02-9 is a valid CAS Registry Number.

27857-02-9Downstream Products

27857-02-9Relevant articles and documents

Synthesis and NMR spectroscopic conformational analysis of benzoic acid esters of mono- and 1,4-dihydroxycyclohexane, 4-hydroxycyclohexanone and the -ene analogue – The more polar the molecule the more stable the axial conformer

Kleinpeter, Erich,Werner, Peter,Linker, Torsten

, p. 3801 - 3809 (2017/06/13)

para-Substituted benzoic acid esters of cyclohexanol, 1,4-dihydroxycyclohexane, 4-hydroxy-cyclohexanone and of the corresponding exo-methylene derivative were synthesized and the conformational equilibria of the cyclohexane skeleton studied by low temperature 1H and 13C NMR spectroscopy. The geometry optimized structures of the axial/equatorial chair conformers were computed at the DFT level of theory. Only one preferred conformation of the ester group was obtained for both the axial and the equatorial conformer, respectively. The content of the axial conformer increases with growing polarity of the 6-membered ring moiety; hereby, in addition, the effect of sp2 hybridization/polarity of C(4)=O/C(4)=CH2 on the present conformational equilibria is critically evaluated. Another dynamic process could be studied, for the first time in this kind of compounds.

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