in benzene 14 h; Heating;

T=80°C; 21 h;

1: 78 percent / hydrazine hydrate / bis-(2-hydroxy-ethyl) ether / 96 h / Heating 2: 80 percent / selenium(I) bromide, Et3N / CH2Cl2 / 0.5 h / Ambient temperature 3: 50 percent / benzene / 14 h / Heating View Scheme

1: 80 percent / selenium(I) bromide, Et3N / CH2Cl2 / 0.5 h / Ambient temperature 2: 50 percent / benzene / 14 h / Heating View Scheme

titanium tetrachloride T=185°C; 4 h;

1: 88 percent / Se powder / 185 °C / 1 Torr / the formation of selones, investigation of twofold extrusion reaction of selones, selones as intermediates in the preparation of sterically hindered molecules ( selenadiazolines, azines) 2: 50 percent / benzene / 14 h / Heating View Scheme

1: 43 percent / 1.) 164 deg C, 4 h, 2.) 170 deg C, 12 h, 3.) 190 deg C, 12 h 2: 50 percent / benzene / 14 h / Heating View Scheme