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1,2,3,5-dithiadiazolium chlorides, [RCN2S2]Cl

1977; Elsevier BV; Volume: 13; Issue: 3-4 Linguagem: Inglês

10.1016/0020-1650(77)80082-2

1878-3473

G. G. Alange, Arthur J. Banister, Betty Bell, Peter W. Millen,

Metal-Organic Frameworks: Synthesis and Applications

Dithiadiazoles, (1,2-disulphur) and (1,3-disulphur), are 7π isoelectronic analogues of the incompletely dimerised S3N2+· radicals present in [S6N4]Cl2 and other S6N42+ salts. The methods of preparation of salts of the precursor 6π dithiadiazolium cations (RCN2S2+) will be outlined; the SNS+ ion is an important synthon for the formation of the 1,3-disulphur cations. Reactions of [SNS]AsF6 with di- and tricyano aromatics, and with the tricyanomethanide anion will be described. The neutral dithiadiazoles, including those with more than one such ring, are prepared by the reduction of the parent dithiadiazolium species. Rearrangement reactions (1,3 to 1,2) and e.s.r., c.v. and X-ray structural data will be discussed. The dithiadiazole, , has been used for a variety of halogen abstraction reactions. Metal complexes of this 1,2-dithiadiazole with Fe, Ni and Pd have been prepared containing 2 or 3 metal atoms. Structures will be discussed.