Inhaltsiibersicht.Bis-(N ' , N ' -diethyl-N-benzoylsele-interpretiert werden. Die Verbindung besteht aus noureato)nickel(II) reagiert mit Diphosgen in Benzen 1,2,4-Diselenazolium-Kationen, die als planare Fiinfzu 3-Diethylamino-5-phenyl-l , 2,4-diselenazolium-tetra-ringe vorliegen und aus tetraedrischen Tetrachloroniccochloroniccolat(II), dessen Rontgenkristallstrukturanalyse lat(I1)-Anionen. Sie ist zu 3-Diethylamino-5-pheund Rontgenphotoelektronenspektrum vorgestellt und nyl-1 ,2,4-dithiazolium-tetrachloroniccolat(II) isomorph.
3-Diethylamino-5-phenyl-l,2,4-diselenazolium-tetrachloroniccolate(II) -Synthesis and StructureAbstract.Bis-(N ' , N ' -diethyl-N-benzoylselenourea-3-diethylamino-5-phenyl-l , 2,4-dithiazolium-tetrachloroto)nickel(II) reacts with diphosgene in benzene to niccolate(I1).3-diethylamino-5-phenyl-1 , 2,4-diselenazolium-tetrachloroniccolate(I1). Its structure is confirmed by RKSA and ESCA. The compound consists of cations, which are planar fivemembered rings and of tetrahedral tetrachloroniccolate(I1) anions. The complex is isomorphic with selenaheterocyclic cation; synthesis; crystal structure
About the Reversible Conversion of 3‐Diethylamino‐5‐phenyl‐1,2,4‐dithiazoliumhalometallates into Metal Chelates of 3‐(Thio)benzoyl(thio)ureas
Redox reactions of 3‐diethylamino‐5‐phenyl‐1, 2,4‐dithiazolium halometallates 1a‐e and metal chelates (M = CuII (2 A), CoII (2 C), NiII (2 F)) of 3‐thiobenzoylthioureat was studied by cyclic voltammetry. 1 are converted by reduction into 2. The mechanism of the oxidation of 2 A, C, F into 1a, d, e is dependent on the central ion.
On formation of 1 a from copper(II) chelates of 3‐benzoylthiourea 3 A by means of thionylchloride as well as by electrochemical oxidation 3‐benzoylureas 4 A are formed as sideproducts.
Thienoanneleted 6aλ4‐Thia‐1,6‐diazapentalenes by Baseinduced Dimerisation of 5‐Methyl‐isothiazolium Salts
Isothiazolium salts 2 and 3 are easily available by reaction of (Z/E)‐β‐thiocyanatovinyl aldehydes with primary aliphatic and aromatic amines in acetic acid or with aromatic amine hydrochlorides, respectively. Preparative advantages of this reaction are demonstrated and discussed. Reaction of 3 with secondary amines results in an unexpected formation of 6aλ4‐thia‐1,6‐diazapentalenes 5, a new typ of thiadiazapentalenes anellated with a heterocyclic ring system. The structure of 5 was evidenced by IR, UV, 1H‐, 13C‐n.m.r. spectral data and supported by elemental analysis. By means of 15N‐ and 13C‐n.m.r. spectroscopy the synthesized thiadiazapentalenes were found to be stable towards protonation.
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