Naphtalens

The reaction of 1-alkoxynaphtalenes with copper (II) bromide in benzene produced a mixture of 4-bromo-1-alkoxynaphtalenes and 4,4 -dialkoxy-l,l -binaphtyls. For instance, the reaction of 1-methoxynaphtalene 4 with copper(II) bromide in refluxing benzene for 2 h. gave a mixture of 4-bromo-1-methoxy-naphtalene 5 (47 %) and 4,4 -dimethoxy-l,l -binaphtyl 6 (45 %). In contrast, in similar reaction using alumina-supported copper(II) bromide at 30°C, only dimerization occurred and no brominated compounds were obtained. 

Fig. 6. Effect of diethyl ether on the bromination of toluene Selective Bromination of Naphtalene...

Ohwada extends his theory, unsymmetrization of n orbitals, to Orbital Phase Environment including the secondary orbital interaction (Chapter Orbital Phase Environments and Stereoselectivities by Ohwada in this volume). The reactions between the cyclopentadienes bearing spiro conjugation with benzofluorene systems with maleic anhydride exemplified the importance of the phase environment. The reactions proceed avoiding the out-of-phase interaction between dienophile LUMO and the HOMO at the aromatic rings. The diene 34 with benzo[b]fluorene favored syn addition with respect to the naphtalene ring, whereas the diene 35 with benzo[c]fluorene showed the reverse anti preference (Scheme 22) [28]. 

R = Ph, p-MeAr, p-CIAr, p-MeOAr, 1-naphtalene, o-CFgAr.S-tiophene... 

XAD2 tube Benzo(a)pyrene, Fluoranthene, Naphtalene Halothane Phenol... 

Martin, J. M. L., El-Yazal, J., Francois, J.-P, 1996, Structure and Vibrational Spectrum of Some Polycyclic Aromatic Compounds Studied by Density Functional Theory. 1. Naphtalene, Azolene, Phenanthrene, and Anthracene , J. Phys. Chem., 100, 15358. 

Van der Waals, J.H. and De Groot, M.S. 1959. Paramagnetic resonance in phosphorescent aromatic hydrocarbons. I naphtalene. Molecular Physics 2 333-340. 

The electron mobility of oxadiazoles have been measured in a polymer matrix, values of 10 7 up to 10 3 cm2/Vs have been obtained [262, 263], These values are exceeded by starburst phenylquinoxalines (30) that approach 10-4 cm2/Vs at 106 V/cm [264]. Other material classes that are very interesting candidates for electron-transport layers comprise naphtalene-, 60, and perylenetetracarboxylic diimides, 59 [265], as well as bathophenanthroline [266] with reported electron mobilities of 10 3 and 4.2 x 10 4cm2/Vs, respectively. 

Congo Red 3,3 -[[l,l -biphenyl]-4,4 -diylbis-(azo)]bis[4-amino-l-naphtalene -sulphonic acid] disodium salt... 

Fig. 3.99. Examples of the evolution of the chromatographic peak areas corresponding to the dye metabolites during SBR 1 cycles in periods 2 (a) and 3 (b). Metabolites 1 ( ) and 3 ( ) correspond to the benzene-based and naphtalene-based amines, respectively. Metabolite 2 (o) is apparently in equilibrium with metabolite 1. The violet dye concentrations calculated form spectrophotometric analysis ( ) are also presented. Reprinted with permission from N. D. Lourenco et al. [156],...

Aminobenzenesulfonate 1 - Aminonaphtalene-7-sulphonate 1 - Aminonaphtalene-5 -sulphonate Benzenesulphonate N aphtalene-1,5 -disulphonate 6 Naphtalene-2,6-disulphonate 1 -Hydro xynaphtalene-4-sulphonate Toluene-4-sulphonate 3-Nitrobenzenesulphonate l-Aminonaphtalene-8-sulphonate N aphtalene-1 -sulphonate Naphtalene-2-sulphonate l-Hydroxynaphtalene-2-sulphonate Anthraquinone-2-sulphonate Methylenebis-8,8 -naphtalene Reactive orange Reactive black 5 Reactive red 198... 

RETENTION TIMES, fR (MIN) IN REVERSED-PHASE HPLC OF NAPHTALENE SULPHONIC ACIDSa... 

---