20 research outputs found
CHIRAL CYCLIC AMIDINES
No full textCyclic amidines are prepared in 3 steps from an aromatic aldehyde, isobutyraldehyde, and urea. The amidines 1 and 2 are readily resolved using chiral cyclic phosphoric acids
CHIRAL SPIRANES - OPTICAL-ACTIVITY AND NUCLEAR MAGNETIC-RESONANCE SPECTROSCOPY AS A PROOF FOR STABLE TWIST CONFORMATIONS
No full textCHIRAL TETRAALKYLMETHANES - 2 SYNTHESES OF OPTICALLY-ACTIVE BUTYLETHYLMETHYLPROPYLMETHANE OF KNOWN AND HIGH OPTICAL PURITY
No full text
SATURATION OF THE HYPERPOLARIZABILITY OF OLIGOTHIOPHENES
Get PDFThe observation is reported of satn. with chain length of the 2nd hyperpolarizability of a series of long defined conjugated oligothiophenes. This satn. occurs at the same length as that of the band gap and of the polarizability, and is attributed to a satn. of the effective conjugation length. Solvatochromic and thermochromic measurements indicate that conformational effects play a role. [on SciFinder (R)
