Chiroptical Properties of Some (S)-N,N'-Bis[(1-phenyl-5-alkyl-4,5-dihydro-6¬oxo-l,2,4-triazin-3-yl) ethylidene] propane-l,3-diamine nickel(II)

Model  chiral 3-acetyl4,5-dihydro-1,2,4-triazinones  1a-e   were reacted,     utilizing the template effect, with 1,3-diaminopropane  in the presence of nickel  acetate.   The resulting chiral open chain tetranza-type nickel complexes 2a-c were characterized by elemental analysis and NMR spectral   data.   Their CD spectra in organic solvents revealed the   same features for the masked aliphatic and  aromatic  amino  acid  residues  of the  same L-configuration. The stereochemistry at C-5 is correlated with the signs of the observed CE bands.

R M EL ABADELAH ,M H Z CHAUDHRY ,W VOELTER ,