Welcome to LookChem.com Sign In|Join Free

CAS

  • or

219618-21-0

Post Buying Request

219618-21-0 Suppliers

Recommended suppliersmore

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

219618-21-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 219618-21-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,6,1 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 219618-21:
(8*2)+(7*1)+(6*9)+(5*6)+(4*1)+(3*8)+(2*2)+(1*1)=140
140 % 10 = 0
So 219618-21-0 is a valid CAS Registry Number.

219618-21-0Relevant articles and documents

Methylenecyclopropanes in elimination and addition reactions: Quantification of the effects of strain

Volta, Luca,Stirling, Charles J. M.

experimental part, p. 1508 - 1522 (2010/03/24)

The effect of strain in 1,2-elimination reactions that form methylenecyclopropanes has been evaluated for a series of leaving groups. The worse the leaving group, the greater is the inhibitory effect of strain build-up, which reaches 50% of the excess enthalpy differential for the poorest leaving group studied. In nucleophilic addition to an electrophilic methylenecyclopropane, comparison of strained and unstrained systems shows that about 60% of the excess enthalpy differential promotes the reactivity of the strained system.

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 219618-21-0