Trithiazyl chloride

Compared with the large number of nitrosyl complexes, only a few examples of thionitrosyl complexes have been studied. Although NS does not exist, a number of synthetic approaches to thionitrosyl complexes have been reported the reaction of nitrido complexes with S2CI2 or TMSNCS, treatment of chloro or 0x0 complexes with trithiazyl chloride or S(NTMS)2, or the use of heterocyclic nitrogen-sulfur rings. Pre-formed thionitrosyl cations in [NS][SbF6] or [NS)[AsFg] have been used to prepare the cationic complex [Re(NS)(CO)5] " in liquid S02. ... 

Trithiazyl Chloride, N3S3C1, is formed by the decomposition of nitrogen chlorosulphide. It forms stable copper-coloured needles, which are slightly soluble in chloroform.3... 

Reaction with trithiazyl chloride (237) Variable-temp. IR and Raman, including assignments and normal coordinate analyses X-ray (239)... 

The thionitrosyl tetrahalogeno complex anions [Tc(NS)Cl4] and [Tc(NS)Br4] were synthesized by reaction of [TcClf,] " and [TcBrf,] ", respectively, with trithiazyl chloride, (NSC1)3. Yellow [Ph4As][Tc(NS)Cl4j was obtained when [Ph4As]2[ l cCU] was reacted with (NSCI)3 in dichloromethane. The N-S stretch of the complex appeared at 1219 cm" in the IR. Red-brown [Ph4As][Tc(NS)Br.,] was obtained by... 

Dithiadiazoles.—Trithiazyl chloride (trichlorocyclotrithiazine) will react with nitriles RCN (R = CCI3 or Ph) to give the 1,2,3,5-dithiadiazolium salts (274 R as before). The salt (274 R = Ph) may also be obtained from the benz-amidinium salt and sulphur dichloride. 

The 1,4-diketone 1,2-dibenzoylethane 151 can be transformed in one step into 3,4-dibenzoyl-l,2,5-thiadiazole 152 when treated either with preformed trithiazyl trichloride in tetrachloromethane (Equation 29) <1997J(P1)2831> or with urethane, thionyl chloride, and pyridine in benzene (Katz reagent) <2002ARK90> (see also Section 5.09.9.2.l(iii)(b)). Similarly, treatment of 1,3-diketones 153 with tetrasulfur tetranitride antimony pentachloride complex in toluene at 100 °C < 1998J(P 1 )2175 >, or trithiazyl trichloride in boiling tetrachloromethane < 1997J(P 1)2831 >, affords 4-substituted-3-aroyl-l,2,5-thiadiazoles 154 (Equation 30). 

Evidence has been presented for initial electrophilic substitution by thiazyl chloride (NSC1) in die reaction of trithiazyl trichloride with 2,5-diarylfurans (38) which eventually yields 5-aroyl-3-arylisothiazoles.86... 

The optimum yield of the chloropropyl 1,2,5-thiadiazole 97 was produced by treatment of the enamino-ester 95 with trithiazyl trichloride (92) in boiling CCI4. It was postulated that the reaction proceeded via the thiadiazolium salt 96 which could be then dealkylated by chloride ion to give 97 <01JCS(P1)662>. 

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