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40775-32-4

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40775-32-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40775-32-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,7,7 and 5 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 40775-32:
(7*4)+(6*0)+(5*7)+(4*7)+(3*5)+(2*3)+(1*2)=114
114 % 10 = 4
So 40775-32-4 is a valid CAS Registry Number.

40775-32-4Relevant articles and documents

Preparation of Poly(2,5-diheptyl-1,4-phenylenevinylene) by Sulfonium Salt Pyrolysis

Sonoda, Yoriko,Kaeriyama, Kyoji

, p. 853 - 857 (1992)

Poly(2,5-diheptyl-1,4-phenylenevinylene) (1) was prepared by the sulfonium salt pyrolysis procedure.Tough films of 1 were obtained by pyrolysis of its sulfonium salt precursor film.Due to flexible side chains, 1 was soluble in organic solvents such as chloroform.The molecular weights were Mn=3.8-4.7*104 and Mw=1.4-1.8*105.The ratio of trans to cis olefinic units was found to be 93:7 from the 1H NMR spectrum.Two arylmethylene peaks suggested that there were two kinds of stereochemically different methylene groups.Although the peak energy in the absorption spectra was almost identical to those of poly(1,4-phenylenevinylene) (PPV), the electrical conductivity of 1 was much lower than that of PPV.

SYNTHESIS AND SPECTROSCOPY OF 1,4-DIALKYLBENZENES

Issac, Yvette A.,El-Zein, S. M.,Barakat, Y.

, p. 463 - 470 (2007/10/02)

Five linear 1,3-dialkylbenzenes namely, dibutyl-, dipentyl-, dihexyl-, diheptyl- and dioctylbenzenes were prepared in good yield via two simple catalytic routes under very mild conditions and affording insignificant side products, The starting feed, 1,4-d

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