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Structure of 2-(2', 3'-dihydro-1'H-inden-1'-yl)-1H-indene with the assignment of the C-atoms used in this study.
Source publication
1H, 13C and two dimensional NMR analyses were applied to determine the NMR parameters of 2-(2,3-dihydro-1H-inden-1-yl)-1H-indene. The chemical shifts of all the H- and C-atoms, as well as the appropriate coupling constants were determined and the complete NMR resonance assignments of the molecule are given. The predicted patterns of the four di...
Contexts in source publication
Context 1
... structure of 2-(2',3'-dihydro-1'-H-inden-1'-yl)-1H-indene with the usual assignment of the C-atoms is shown in Fig. 1 and its 1 H-NMR spectrum in Fig. 2. The following peaks originated from the investigated sample: four multiplets from 4H at 2.13; 2.50; 2.98 and 3.08 ppm; AB system doublet from 2H at 3.31 and 3.38 ppm; a triplet from 1H at 4.36 ppm; a singlet from 1H at 6.64 ppm and aromatic H atoms at 7.14 -7.39 ...
Context 2
... The H-atoms of the CH 2 group of the indene structural element are not equiva- lent, as in indene. This is a consequence of the influence of the substitute on C-2. They represent an AB system and create two typical doublets centered at 3.31 and 3.38 ppm (see Fig. 2). The Differential Functional Theory (DFT) calculation of the structure shown in Fig. 1 gave clearly different values of the natural charge of these two H-atoms; 6 1H on C-3 -6.64 ppm, singlet; 1H on C-1'-4.36 ppm, triplet (in the case of diphenylmethane singlet at 3.95 ppm); 2H on C-2' -2.13 and 2.50 ppm, multiplets (in the case of indane peak at 2.09 ppm); 2H on C-3'-2.98 and 3.08 ppm, multiplets (in the case of indane ...
Citations
1H, 13C and two-dimensional NMR analyses were applied to determine the NMR parameters of 6-(2′,3′-dihydro-1′H-inden-1′-yl)-1H-indene. The measurements were accomplished with 0.5 mg of the substance, this quantity being sufficient to determine the chemical shifts of all the H and C atoms, and also the appropriate coupling constants and to give the complete NMR resonance assignments of the molecule. The predicted patterns of the four different H atoms of the methylene groups of the indane structural element coincided completely with the complex patterns in the NMR spectra. Copyright © 2002 John Wiley & Sons, Ltd.
Graphite oxide (GO) was used as an effective oxidizing agent for the synthesis of aldehydes and ketones from various alcohols under ultrasonic irradiation. Under optimized conditions, quantitative yields of the products were obtained. Compared to other reagents used for the same chemical transformation, GO displays several advantages, including low cost, ease of synthesis, and high stability to ambient conditions.
The reaction of 1H-indene (indene) in the presence of Friedel-Crafts acids was studied. As expected [M. Spiteller, J. Jovanovic, Fuel 78(1999)1263] there were dimers and trimers in the product mixture together with higher oligomers. Among products with double molecular weight relative to the molecular weight of indene, the structure of four compounds was determined: 6-(2',3'-dihydro-1'H-inden-1'-yl)-1H-indene, 2-(2',3'-dihydro-1'H-inden-1'-yl)-1H-indene, 1-(2',3'-dihydro-1'H-inden-2'-yl)-1H-indene and 2,3,1',3'-tetrahydro-[1,2']biindenylidene. It was shown that the first one represents an indene alkylation product and that the others were obtained by bonding of the indan-1-ylium ion and indene at the position 2, followed by acid catalyzed 1,2-hydride rearrangement in the case of the third and fourth one. Considering the indene dimerization products as components of pyrolysis oils and as interesting compounds to be used as model substances for NMR, MS and X-ray analysis, the reaction, separation and isolation parameters were optimized in this study.
Heterolytic cleavage of the C–OH bond of various benzylic alcohols has been catalyzed with H6P2W18O62. Alkenes or symmetric ethers are produced, depending on the structure of the substrate.
