Welcome to LookChem.com Sign In|Join Free

CAS

  • or

137639-72-6

Post Buying Request

137639-72-6 Suppliers

Recommended suppliersmore

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

137639-72-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137639-72-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,6,3 and 9 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 137639-72:
(8*1)+(7*3)+(6*7)+(5*6)+(4*3)+(3*9)+(2*7)+(1*2)=156
156 % 10 = 6
So 137639-72-6 is a valid CAS Registry Number.

137639-72-6Downstream Products

137639-72-6Relevant articles and documents

Attempted Synthesis of Esters of Tricarballylic Acid and 3,5-Dibromosalicylic Acid. Structure and Properties of Tricarballylic Acid, its Anhydrides and Some of their Derivatives, and an Investigation of the Reaction Pathways of Anhydride Formation by 1H NMR Spectroscopy, MNDO and Mole...

Razynska, Anna,Rak, Janusz,Fronticelli, Clara,Bucci, Enrico

, p. 1531 - 1540 (2007/10/02)

Reactions ordinarily leading to the formation of esters of carboxy acids afford, in the case of tricarballylic acid, the cyclic anhydride.A comparison of the experimental and simulated 1H NMR spectra reveals that the product contains a five-membered ring structure.To explain the experimental findings, theoretical calculations were performed at the level of molecular mechanics and MNDO methods, in order to obtain information on the structure and thermodynamic stability of various substrate conformations and reaction products, as well as on the reaction pathways of anhydride formation.Theoretical predictions reveal that the formation of the five-membered ring structure is preferred in the case of tricarballylic acid anhydride.

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 137639-72-6