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156783-44-7

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156783-44-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156783-44-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,7,8 and 3 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 156783-44:
(8*1)+(7*5)+(6*6)+(5*7)+(4*8)+(3*3)+(2*4)+(1*4)=167
167 % 10 = 7
So 156783-44-7 is a valid CAS Registry Number.

156783-44-7Relevant articles and documents

Preparation of thioxophosphine Sulfide with Intramolecular Participation of Nitrogen Lone Pair in Stabilization

Yoshifuji, Masaaki,Otoguro, Akihiko,Toyota, Kozo

, p. 1503 - 1506 (1994)

The 4-t-butyl-2,6-bis(N,N-dimethylaminomethyl)phenyl group was utilized to prepare thioxophosphine sulfide.A 31P NMR chemical shift of the thioxophosphine sulfide shows a high field shift by 153 ppm compared with that of (2,4,6-tri-t-butylphenyl)thioxophosphine sulfide, suggesting a strong intramolecular participation with the lone-pair electrons of the nitrogen atom in stabilization of the -P(=S)2 group.

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