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29938-08-7

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29938-08-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 29938-08-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,9,9,3 and 8 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 29938-08:
(7*2)+(6*9)+(5*9)+(4*3)+(3*8)+(2*0)+(1*8)=157
157 % 10 = 7
So 29938-08-7 is a valid CAS Registry Number.

29938-08-7Relevant articles and documents

How to build fully π-conjugated architectures with thienylene and phenylene fragments

Lois, Sandrine,Flores, Jean-Charles,Lere-Porte, Jean-Pierre,Serein-Spirau, Francoise,Moreau, Joel J. E.,Miqueu, Karinne,Sotiropoulos, Jean-Marc,Baylere, Patrick,Tillard, Monique,Belin, Claude

, p. 4019 - 4031 (2008/02/13)

A series of small-sized model π-conjugated oligomers have been prepared from thienylene and phenylene or dimethyl-or dimethoxy-substituted phenylene units. Crystallographic data for the methoxylated compound show a quasi-planar conformation with a non-covalent S-O interaction. The resulting strong conjugation in the gas phase has also been highlighted by UV/photoelectron spectroscopy and theoretical calculations (DFT). Indeed, for these compounds there is a large energy gap ΔEπ arising from the interaction between the molecular orbitals of the isolated thienylene-phenylene species. This can be explained in terms of the energies of the two π orbitals of the dimethoxyphenylene unit, the shape of these molecular orbitals in a three-orbital interaction diagram and by the presence of the S...O interaction which reduces the inter-ring angle between the two aromatic cycles. The nature of the sulfur-oxygen interaction, discussed from a theoretical point of view, is mainly electrostatic, the orbital contribution from the only correctly directed orbitals nOσ and σ*S-C being slightly stabilising. These results show extensive conjugation of the π system corroborated by a small HOMO-LUMO gap. These studies, carried out in the solid state and in the gas phase, show how important it is to combine thienylene and dialkoxyphenylene fragments to obtain oligomers with a strong electronic delocalisation. Thus, these compounds are of interest in the fields of electronic and optoelectronic devices. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.

Synthesis of pyranoisoflavones by the oxidative rearrangement of dihydropyranochalcones with thallium(III) nitrate: Synthesis of elongatin, its angular isomer, toxicarol isoflavone, and related compounds

Tsukayama,Horie,Iguchi,Nakayama

, p. 592 - 600 (2007/10/02)

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