J. Braz. Chem. Soc. vol.10 número5

Despite the tremendous effort in the generation of wide experimental information there is no clear understanding on the nature of these excited states. Following Terrile 17 et al.

The stems and fruits of Vismia parviflora have been shown to contain sitosterol, betulinic acid, lupeol, friedelin, β -friedelinol, shikimic acid, 3,4-dihydroxybenzoic

Numa épo ca em que se fala tan to das di fi cul da des en fren ta das pelo sis te ma de Ciên cia e Tec - no lo gia no país, é fun da men tal, prin ci pal men te para as no vas ge -

Chemical shifts and coupling con- stants (J) of the hydrogen atoms were obtained from the 1 H-NMR (1D). a Chemical shifts of carbon atoms (50.3 MHz, acetone-d 6 )

Electron affinities of twelve small molecules were calculated by density functional theory using two different functionals(B88-P86 and B3LYP) combined with three different basis

The experimental vibrational temperature T vib of I 2 mole- cule scattered from PFPE surface with incident translational energy of 40 kJ/mol is 150 K in the direct

An efficient preparation (12 steps, 18% overall yield and 82% enantiomeric excess) of enantiomerically en- riched (+)-sitophilure (1) was developed from methyl (S)-

The common segment of two enaminone molecules have quite similar crystal structural parameters and corre- spond to the E configuration of the double bond. The NMR shifts of the