Welcome to LookChem.com Sign In|Join Free

CAS

  • or

82744-94-3

Post Buying Request

82744-94-3 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

82744-94-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 82744-94-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,2,7,4 and 4 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 82744-94:
(7*8)+(6*2)+(5*7)+(4*4)+(3*4)+(2*9)+(1*4)=153
153 % 10 = 3
So 82744-94-3 is a valid CAS Registry Number.

82744-94-3Relevant articles and documents

RELATIONSHIPS OF TRANSAMINATION OF SUBSTITUTED UREAS. V. THERMODYNAMICS OF TRANSAMINATION OF DIARYLUREAS BY DIALKYLAMINES

Chimishkyan, A. L.,Gulyaev, N. D.,Leonova, T. V.

, p. 20 - 24 (2007/10/02)

The equilibrium constant of the transamination of N,N'-diarylureas by dialkylamines in o-dichlorobenzene in the range of 120-158 deg C depends significantly on the nature of both reagents.The enthalpy of activation and the entropy of dissociation of diarylureas are proportional to the thermal effect of the transamination of these ureas by diisobutylamine.The same relationships is observed between the enthalpy of activation of the bimolecular reaction of N,N'-diphenylurea with dialkylamines and the enthalpy of the process.The established relationships between the enthalpies of activation and the enthalpy of equilibrium are explained satisfactorily in terms of the Hammond-Thornton model.

INFRARED SPECTROSCOPIC AND CONFORMATIONAL STUDIES OF TRISUBSTITUTED UREAS CONTAINING CHLOROPHENYL GROUPS

Mido, Yoshiyuki,Furusawa, Chizuko

, p. 23 - 28 (2007/10/02)

The IR spectra, in the ν(N-H) region, of trisubstituted ureas R2UPhCl and RPhUPhCl containing a chlorophenyl group have been studied in order to examine the effects of the introduced chlorine atom.The out-trans-cis isomerism about the NH-CO rotational axis is discussed in reation to steric effect of the R2 group, Ph-Ph interaction and inter- and intra-molecular hydrogen bonding.In dilute solution, R2UPhCl exists in the trans or the out form, and RPhUPhCl in the cis form. o-Chlorophenyl derivatives show a monomeric ν(N-H) band at a wavenumber lower than that of the other derivatives and no associated ν(N-H) bands in concentrated or even in saturated solutions.Some of the derivatives are found to be in the same form in the solid state as in solution due to the retention of intra-molecular NH...Cl hydrogen bonding.

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 82744-94-3