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38144-19-3

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38144-19-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 38144-19-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,8,1,4 and 4 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 38144-19:
(7*3)+(6*8)+(5*1)+(4*4)+(3*4)+(2*1)+(1*9)=113
113 % 10 = 3
So 38144-19-3 is a valid CAS Registry Number.

38144-19-3Relevant articles and documents

Kinetics of the reaction of 4-nitrophenyl benzoates with 4-chlorophenol in the presence of potassium carbonate in dimethylformamide

Os'kina,Vlasov

, p. 865 - 872 (2006)

The effect of the substituent in the benzoyl group on the relative rate and activation parameters of transesterification of substituted 4-nitrophenyl benzoates with 4-chlorophenol in dimethylformamide in the presence of potassium carbonate was studied by the competing reaction technique. The whole series of benzoates showed the enthalpy-entropy compensation effect. 4-Nitrophenyl benzoates having electronacceptor substituents give rise to isokinetic relationship with an isokinetic temperature β of 382 K. The mechanism of the transesterification process is discussed. Pleiades Publishing, Inc., 2006.

Evidence of a stepwise acyl-transfer reaction mechanism: Nonlinear hammett plots for reactions of p-nitrophenyl substituted benzoates with hydroxide and p-chlorophenoxide

Um, Ik-Hwan,Chung, Eun-Kyung,Kwon, Dong-Sook

, p. 4787 - 4790 (2007/10/03)

The Hammett plots obtained for the title-reactions exhibit a break, i.e. ρ acyl values decrease from 2.21 ~ 2.44 to 1.45 ~ 1.52 as the acyl substituent becomes a strong electron withdrawing group (σ > 0.6). Such a break in the Hammett plots is suggestive of a change in the reaction mechanism and strong evidence of a stepwise mechanism for the acyl-transfer reaction.

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