[PDF] Top 20 J. Braz. Chem. Soc. vol.11 número5
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J. Braz. Chem. Soc. vol.11 número5
... The main objectives for the substitution of some of the members that formed the Editorial Advisory Board since the launch of the Journal of the Brazilian Chemical Society were to contemp[r] ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... in hexanes (28 cm 3 , 28 mmol) was added at 40 o C followed by the dropwise addition of CH 2 I 2 (11.37 g, 42.45 mmol). After the addition was complete, a slow flow of O 2 was introduced into the headspace above the ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... strates 5a and 5b under Heck conditions, substrate con- sumption was observed but no defined products could be detected by TLC or upon workup of the reaction. Attention was then focused upon the ketal substrate 9a, which ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... spectrum of 1 indicated the presence of signals corresponding to three aromatic hydrogens [ δ H , 6.82 (dd, J 8.4 and 0.8 Hz, H-7), 7.05 (dd, J 8.4 and 0.8 Hz, H-5) and 7.76 (t, J 8.4 Hz, H-6)] in an ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... The structures were solved by standard Patterson and difference Fourier techniques and refined by full-matrix least-squares methods with anisotropic thermal parameters for the non-hydrogen atoms, with the exception of ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... A stirred suspension of 195.3 mg (0.54 mmol) of TPPSA, 116.8 mg (0.53 mmol) of N-aminopyridinium iodide 11 and 181.1 mg (1.31 mmol) of anhydrous K 2 CO 3 was left at room temperature overnight, filtered and the ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... When the dissolved organic carbon concentration in the solution phase is higher than 200 mg L -1 , the increase in humic acid adsorption on aluminum oxide becomes negligible.. Figure 1.[r] ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... The instrumental setup as well as the carbon fiber ultramicroelectrode (CF-UME) preparation have been described earlier 17 . Briefly, a triangular waveform from a function generator (Universal Programmer PAR-175 ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... HRGC-MS (high resolution gas chromatography coupled with mass spectrometry) analysis allowed the identification of the chemical constituents (alkaloids and other compounds) from the extr[r] ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... While the chemical shifts of aromatic carbons for compound III were assigned by comparison with those of compound II , those of aro- matic carbons in trimer IV were determined by co[r] ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... Dence, C.W., Eds.; Springer Verlag; Berlin, 1992, p. 409. 7. Robert, D. In Methods in Lignin Chemistry, Lin, S.Y.; Dence, C.W., Eds.; Springer Verlag; Berlin, 1992, p. 250. 8. Berns, J; Meier, D. and Faix, O. ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... Samples of propolis and comb waxes were collected from hives growing in the states of São Paulo and Paraná (Southeast and Southern Brazil, respectively) (Table 1).. Extraction of the wax[r] ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... These results, together with the above considerations relating to the affinity of the rhodium complexes with HSA and/or intact cells, indicate that albumin can be a drug reservoir for [R[r] ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... The n π * excited state of the tricarbonyl can be quenched by di-substituted olefins containing no allylic hydrogens without product formation. For example, when 1,2,3- indanetrione is photolyzed in the presence of ... See full document
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J. Braz. Chem. Soc. vol.11 número5
... The electrochemical behaviour of copper has been investigated in N-N, dimethylformamide in the presence of water, ethanol and/or acetic acid as contaminants, by a potentiodynamic method.[r] ... See full document
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J. Braz. Chem. Soc. vol.11 número2
... In 1999, the JBCS appeared, for the first time, in the Journal of Citation Reports (JCR) with an IF of 0.293. In 2000, the JCR brings two welcomed results: the IF for JBCS jumped to 0.472, putting it in the position with ... See full document
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J. Braz. Chem. Soc. vol.11 número3
... 44. See for instance: (a) Tata, M.; John, V.T.; Waguespack, Y. Y.; McPherson, G. L. J. Phys. Chem. 1994, 98, 3809. (b) Hanabusa, K.; Miki, T.; Taguchi, Y.; Koyama, T.; Shirai, H. J. Chem. ... See full document
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J. Braz. Chem. Soc. vol.11 número4
... 11. Frisch, M. J.; Trucks, G. W.; Schlegel, H. B.; Gill, P. M. W.; Johnson, B. G.; Robb, M. A.; Cheeseman, J. R.; Keith, T.; Petersson, G. A.; Montgomery, J. A.; Raghavachari, K.; Al-Laham, M. ... See full document
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J. Braz. Chem. Soc. vol.11 número2
... 30. De Almeida, W. B.; Dos Santos, H. F.; Rocha, W. R.; Zerner, M. C. J. Chem. Soc., Dalton Trans. 1998, 15, 2531. 31. GAUSSIAN 94 (revision A.1). Frisch, M. J.; Trucks, G. W.; Schlegel, H. ... See full document
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J. Braz. Chem. Soc. vol.11 número2
... coordination chem- istry has led to a number of new powerful synthetic methods involving the selective formation and/or cleavage of C-C and C-heteroatom ... See full document
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