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70057-32-8

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70057-32-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 70057-32-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,0,5 and 7 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 70057-32:
(7*7)+(6*0)+(5*0)+(4*5)+(3*7)+(2*3)+(1*2)=98
98 % 10 = 8
So 70057-32-8 is a valid CAS Registry Number.

70057-32-8Relevant articles and documents

Silicon-carbon unsaturated compounds XXVII. Nickel-catalyzed reactions of 2-phenyl- and 2-(o-tolyl)-2-(phenylethynyl)hexamethyltrisilane

Ishikawa, Mitsuo,Nomura, Yasuo,Tozaki, Eizo,Kunai, Atsutaka,Ohshita, Joji

, p. 205 - 213 (2007/10/02)

The nickel-catalyzed reactions of 2-phenyl- and 2-(o-tolyl)-2-(phenylethynyl)hexamethyltrisilane (I and II) with phenyl(trimethylsilyl)acetylene at 180 deg C have been examined.The reaction of I with phenyl(trimethylsilyl)acetylene in the presence of tetrakis(triethylphosphine)nickel(0) gave 1,3-diphenyl-2--1,4-bis(trimethylsilyl)-1-silacyclobut-3-ene and 1,4,4-trimethyl-1,3,6-triphenyl-2,5-bis(trimethylsilyl)-1,4-disilacyclohexa-2,5-diene.Similar reaction of II produced 3-phenyl-2--1-(o-tolyl)-1,4-bis(trimethylsilyl)-1-silacyclobut-3-ene and 4,4,5-trimethyl-2,6-diphenyl-1,3-bis(trimethylsilyl)-1-(o-tolyl)-1,4-disilacyclohexa-2,5-diene.The results of the reactions of I and II in the presence of a catalytic amount of the nickel(0) complex in the absence of phenyl(trimethylsilyl)acetylene are also described.

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