SeCl2 Selenium chloride

Selenium analogues RN=SeCl2 are unknown for R = aryl or alkyl and thermally unstable when R = CE3 or C2E5. The perfluoroalkyl derivatives are prepared by the reaction of dichloroamino compounds and Sc2Cl2 in CCI3E (Eq. 8.18), but they decompose at room temperature to the corresponding diazene and a mixture of selenium chlorides. 

This occurs when equimolecular quantities of selenium chloride (SeCl2) and phenyl-j8-naphthylamine are condensed in benzene solution. It crystallises as small, yellow, bushy needles, M.pt. 176° C., readily soluble in boiling benzene or boiling alcohol, sparingly soluble in cold acetic acid. 

SeCl2 Selenium (II) chloride, 5 127 [SeCl3]+[AlCl4]- Selenium (IV) chloride, compound with aluminum chloride, 6 127 SeCl4 Selenium (IV) chloride, 5 125, 126... 

Selenium monochloride reacts with antipyrine1 as though it were 66 selenoselenyl dichloride, Se SeCl2. When a concentrated solution of the chloride in carbon tetrachloride is added to a concentrated solution of antipyrine in chloroform at 0° C., diantipyryl diselenide (or selenoselenide) is deposited,... 

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