Neue selenreiche 1,3-Dichalkogenol-2-selone via 4,5-Dilithio-1,3-dichalkogenol-2-selone
摘要:
1,3-Dithiole-2-thione (1), 1,3-diselenole-2-selone (2), 1,3-thiaselenole-2-thione (3), 1,3-dithiole-2-selone (4), 1,3-diselenole-2-thione (5) and 1,3-thiaselenole-2-selone (6) are dilithiated with lithium diisopropyl amide in the 4/5 position, followed by selenation (thiolation) and complexation of the resulting heterocyclic diselenolates (dithiolates) to the zinc bis-chelates (tetrabutylammonium or tetraphenylphosphonium salts).These zinc complexes react with benzoyl chloride to the corresponding selenole and thiole esters. It is noteworthy that the heterocyclic thiones with one or two ring selenium atoms undergo ring transformation (Dimroth rearrangement) during the lithiation chalcogenation sequence, whilst the thione sulfur and one ring selenium atom change their places: 3 --> 1,3-dithiole-2-selone-4,5-diselenolate or dithiolate structure, 5 --> 1,3-thiaselenole-2-selone-4,5-diselenolate structure. This observed rearrangement is verified by independent synthetic pathways. The corresponding identical zinc chelates 12 and complex 18 result from the precursors 3 and 4, and 5 and 6, respectively. Trapping experiments support the conclusion that this rearrangement takes place already during lithiation. The zinc chelates and thiole and selenole esters are characterized in detail by IR and above all by C-13 and Se-77 NMR spectroscopy, including NMR shift values of the precursor heterocycles. The X-ray crystal structure determination of bis(tetraphenylphosphonium)-bis(1,3-thiaselenole-2-selone-4,5-diselenolato) zincate (18), obtained from 5, shows the rearrangement of 5 to the 1,3-thiaselenole-2-selone partial structure in 18.
In(III), Tl(III) and V(IV) tris-chelates of the heterocyclic dithiolene and diselenolene ligands 1,3-dithiole-2-thione-4,5-dithiolate (dmit), 1,2-dithiole-3-thione-4,5-dithiolate (dmt) and 1,3-diselenole-2-selone-4,5-diselenolate (dsis). Crystal and molecular structure of (Bu4N)2 [V(dmt)3]
Abstract Synthesis and characterization of the first trischelates of the dichalcogenolene ligands 1,3-dithiole-2-thione-4,5-dithiolate (dmit), 1,2-dithiole-3-thione-4,5-dithiolate (dmt)and 1,3-diselenole-2-selone-4,5-diselenolate (dsis) with the central ions In(III), Tl(III) and V(IV) are reported. On (Bu4N)2[V(dmt)3] the first X-ray structure of a dithiolene tris-chelate containing unsymmetric ligand
Spectroscopic and electrical properties of [Cu4(dmit)3]2− and [Cu4(dsis)3]2− cluster anion complexes and their oxidized species (dmit=4,5-dimercapto-1,3-dithiole-2-thionate; dsis=4,5-di(hydroseleno)-1,3-diselenole-2-selonate)
作者:Akito Yokozawa、Gen-etsu Matsubayashi
DOI:10.1016/s0020-1693(00)85417-1
日期:1991.8
Abstract [Cu4(dmit)3]2− and [Cu4(dsis)3]2− (dmit=4,5-dimercapto-1,3-dithiole-2-thionate(2-); dsis=4,5-di(hydroseleno)-1,3-diselenole-2-selonate(2-)) cluster anioncomplexes, in which the anions consist of tetrahedron skeletons of copper atoms chelated and bridged by dmit-sulfur and dsis-selenium atoms, were prepared. Molecular interactions among the anion moieties through SS and SeSe contacts in
Spectroscopic and electrical properties of the [W(C3Se5)3]2− anion complex (C3Se52− = 1,3-diselenole-2-selone-4,5-diselenolate) and the oxidized species
作者:Katsuji Douki、Gen-etsu Matsubayashi
DOI:10.1016/0020-1693(94)04291-3
日期:1995.3
tetrathiafulvalenium radical cation) in acetonitrile to afford the oxidizedcomplexes [Fe(C 5 Me 5 ) 2 ] 0.5 [W(C 3 Se 5 ) 3 ], [NBu n 4 ] 0.1 [W(C 3 Se 5 ) 3 ] and [TTF] 0.5 [W(C 3 Se 5 ) 3 ], respectively. Current-controlled electrochemical oxidation of the complex in acetonitrile gave [NBu n 4 ] 0.6 [W(C 3 Se 5 ) 3 ]. The oxidizedcomplexes exhibit electrical conductivities of 4.7×10 −5 −1.5×10 −3 S cm −1 at room
摘要通过反应制备了[NBu n 4] 2 [W(C 3 Se 5)3](C 3 Se 5 2- = 1,3-二硒烯-2-硒酮-4,5-二硒酸酯(2-))。在乙醇中用WCl 6溶解Na 2 [C 3 Se 5],然后加入[NBu n 4] Br。二氯甲烷中的循环伏安图在-0.04和+0.03 V处显示两个氧化峰(相对于SCE)。该络合物在乙腈中与[Fe(C 5 Me 5)2] [BF 4],碘或[TTF] 3 [BF 4] 2(TTF·+ =四硫富瓦烯鎓自由基阳离子)反应,得到氧化的络合物[Fe( C 5 Me 5)2] 0.5 [W(C 3 Se 5)3],[NBu n 4] 0.1 [W(C 3 Se 5)3]和[TTF] 0.5 [W(C 3 Se 5)3] , 分别。在乙腈中对该配合物进行电流控制的电化学氧化,得到[NBu n 4] 0.6 [W(C 3 Se 5)3]。氧化的络合物显示出4
Crystal structures of [NBun 4]2[M(C3S5)(C3Se5)](M = Ni or Pd) and properties of the nickel(II) complex
The complexes [NBun4]2[M(C3S5)(C3Se5)](M = Ni 1 or Pd 2) were isolated. Oxidation reactions of 1 with [Fe(C5H5)2][PF6], [Fe(C5Me5)2][BF4] and [ttf]3[BF4]2(ttf˙+= the radical cation of tetrathiafulvalene) and the current-controlled electrolysis of 1 afforded partially oxidizedcomplexes [NBun4]0.7[Ni(C3S5)(C3Se5)], [Fe(C5Me5)2]0.7[Ni(C3S5)(C3Se5)], [ttf]0.7[Ni(C3S5)(C3Se5)] and [NBun4]0.3[Ni(C3S5)(C3Se5)]
分离出配合物[NBu n 4 ] 2 [M(C 3 S 5)(C 3 Se 5)](M = Ni 1或Pd 2)。的氧化反应1用的[Fe(C 5 H ^ 5)2 ] [PF 6 ],[铁(C 5我5)2 ] [BF 4 ]和[TTF] 3 [BF 4 ] 2(TTF + =的硫富瓦烯的自由基阳离子)和电流控制的电解1得到部分氧化的配合物[NBu n 4 ] 0.7 [Ni(C 3 S 5)(C 3 Se 5)],[Fe(C 5 Me 5)2 ] 0.7 [Ni(C 3 S 5)(C 3 Se 5))],[ttf] 0.7 [Ni(C 3 S 5)(C 3 Se 5)]和[NBu n 4 ] 0.3 [Ni(C 3 S 5)(C 3 Se 5))], 分别。对于压实的颗粒,这些部分氧化的络合物在25°C下的电导率为4.2×10 –1 –5.5×10 –5 S cm –1。循环伏安法和电子吸收