Abstract
Abstract Atmospheric parameters and chemical compositions of 5 stars with CN-positive index have been derived. High-dispersion coude echelle spectra were obtained using the 1 m telescope of the Special Observatory of Russian Academy of Sciences equipped with a CCD detector. HD 176411, HD 181984, HD 190940, and HD 207130 are normal giants in the post first dredge-up phase, HD 222404 (γ Cep) is possibly a star before the evolution stage accompanied by mixing of matter. HD 181984 (τ Dra), suspected to be SMR, has metallicity [Fe/H] = +0.10 dex. It shows a slight underabundance of C and O, and overabundance of Na, Al and Mn. HD 176411, HD 190940 and HD 207130 show near-solar metallicity, slight underabundance of C and O, slight overabundance of Na, Al. HD 222404 has nearly solar chemical composition. On average, the found abundances of Y, Zr, Ba are lower than the abundances of La, Ce, Pr and Nd for program stars.
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