Direnko D. Yu. RussiaCentral Research Institute of Engineering Troops named after D.M. Karbyshev of the Ministry of Defense of Russia, st. Karbysheva, 2, Nakhabino, Moscow Region, 143432haron-11-ru@yandex.ru Author's articles The Synthesis of New Organoselenium Heterocyclic Compounds: 2,4-Diaryl-5,6,7,8-Tetrahydroselenochromilium’s Salts