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104197-48-0

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104197-48-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 104197-48-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,4,1,9 and 7 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 104197-48:
(8*1)+(7*0)+(6*4)+(5*1)+(4*9)+(3*7)+(2*4)+(1*8)=110
110 % 10 = 0
So 104197-48-0 is a valid CAS Registry Number.

104197-48-0Downstream Products

104197-48-0Relevant articles and documents

Activation Parameters for the Additions of Arylhalocarbenes to Alkenes

Moss, Robert A.,Lawrynowicz, Witold,Turro, Nicholas J.,Gould, Ian R.,Cha, Yuan

, p. 7028 - 7032 (1986)

By use of nanosecond laser flash photolytic methods, absolute rate constants have been obtained for the additions of p-(trifluoromethyl)phenylbromocarbene (CF3C6H4CBr), phenylbromocarbene (PhCBr), phenylchlorocarbene (PhCCl), phenylfluorocarbene (PhCF), and p-methoxyphenylfluorocarbene (CH3OC6H4CF) to tetramethylethylene (TME) and 1-hexene.The rate constants ranged from 1.7 x 109 (CF3C6H4CBr/TME) to 5.0 x 104 L/(M.s) (CH3OC6H4CF)/1-hexene); classical structure/reactivity relations were obeyed.Determination of the rate constants at temperatures between 315 and 200 K gave Ea, logA, ΔH*, ΔS*, and ΔG* for the 10 reactions.All of thereactions were dominated by ΔS*, ΔG* ranged from 5.0 to 11 kcal/mol for the fastest and slowest reactions.Negative values of Ea were observed some of the faster reactions at higher temperatures.These results are analyzed in terms of single-step addition reactions where ΔG* is dominated by ΔS* and, alternatively, in terms of a two-steps machanism proceeding through a carbene-alkene complex.

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