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178963-22-9

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178963-22-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 178963-22-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,8,9,6 and 3 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 178963-22:
(8*1)+(7*7)+(6*8)+(5*9)+(4*6)+(3*3)+(2*2)+(1*2)=189
189 % 10 = 9
So 178963-22-9 is a valid CAS Registry Number.

178963-22-9Relevant academic research and scientific papers

Synthesis and thermolysis of pentacoordinate 1,2-azaphosphetidines

Kawashima, Takayuki,Soda, Tomokazu,Kato, Katsuhiro,Okazaki, Renji

, p. 489 - 492 (1996)

Pentacoordinate 1,2-azaphosphetidines bearing the Martin ligand were synthesized by the intramolecular dehydration of the corresponding β-amino phosphine oxides with Mitsunobu reagent (Ph3P-EtO2CN=NCO2Et). The X-ray crystallographic analysis of 1,2,4,4,-tetraphenyl derivative shows that it has a distorted trigonal bipyramidal structure with oxygen and nitrogen atoms at apical positions. Their thermolyses gave the corresponding olefins along with a cyclic iminophosphorane, which was readily hydrolyzed to give the cyclic phosphinate and aniline.

N-apicale 1,2λ5-Azaphosphetidine mit P-Pentakoordination und ihre N-aequatorialen Pseudorotamere

Kawashima, Takayuki,Soda, Tomokazu,Okazaki, Renji

, p. 1206 - 1208 (2007/10/03)

Keywords: 1,2λ5-Azaphosphetidine; Heterocyclen; Olefinbildung; Pseudorotamere

Synthesis, Structures, and Thermolysis of Four-Membered Heterocycles Containing a Highly Coordinate Main Group Element

Kawashima,Kato,Iwama,Ohno,Takami,Yamashita,Nishiwaki,Soda,Okazaki

, p. 288 - 296 (2007/10/03)

The oxetanes containing highly coordinate B, Si, Ge, Sn, P, S, and Se and an azaphosphetidine were successfully synthesized. All compounds except B and Sn compounds have the Martin ligand. The X-ray crystallographic analysis indicated that they have a dis

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