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'Nickel Sulfur Complexes' in keywords
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1996 (1)
1992 (1)
1991 (2)
1Author    Dieter Sellmann, Stefan Fünfgelder, Falk KnochRequires cookie*
 Title    Übergangsmetallkomplexe mit Schwefelliganden, LXXV  
 Abstract    Synthese und Struktur von INi('NHS4)|2 und |N i(Py)2('S2')| * Py; Radikalische Templatalkylierungen von |Ni('S2')2l2~** Transition Metal Complexes with Sulfur Ligands, LXXV* Syntheses and Structure of [Ni('NHS4')]2 and [Ni(Py)2('S2')] • Py; Radical Alkylations of [Ni('S2')2]: ** [N i('N HS4')]2 ('N nS4'2~ = 2,2'-bis(2-m ercaptophenylthio)diethylam ine(2-)) was synthesized from Ni(ac)-, and N a2-' N HS4' and characterized by X-ray structure analysis. In the solid state [N i('N HS4')]2 contains two pseudooctahedral [N i('N HS4')] fragments bridged via thiolate d o ­ nors, in D M F solution at 110 C it dissociates into mononuclear entities. The product o f the template reaction between [Ni('S2')2]2~ ('S2'2-= 1,2-benzenedithiolate) and (BrC\H4)2NH was shown to contain an as yet unidentified by-product in addition to [Ni('NnS4')]2. Pure [N i('N HS4')]2 does not react with pyridine, but the template product forms [N i(Py)2('S2')] which has a square planar coordination geometry with the pyridine rings perpendicular to the N iS2N 2 plane. Investigation o f the template formation o f [N i('N HS4')]2 provided evidence that the reaction o f [Ni('S,')J--with (BrC2H4)^NH involves radicals, suggesting a radical chain reaction m echa­ nism. 
  Reference    Z. Naturforsch. 46b, 1593—1600 (1991); eingegangen am 13. Mai 1991 
  Published    1991 
  Keywords    Nickel Sulfur Complexes, X -Ray, Template Reaction 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1593.pdf 
 Identifier    ZNB-1991-46b-1593 
 Volume    46 
2Author    Dieter Sellmann, Stefan Fünfgelder, Falk Knoch, M. Atthias, MollRequires cookie*
 Title    Übergangsmetallkomplexe mit Schwefelliganden, LXXVI* Redox-und Additionsreaktionen von Nickelkomplexen mehrzähniger Thioether-Thiolat-Liganden. Röntgenstrukturanalysen von (N M e4)2 [Ni('S2')2 l und INi('S4-C 3 /)(PM e3)]** Transition M etal Complexes with Sulfur Ligands, LXXVI* Redox and Addition Reactions of Nickel Complexes with M ultidentate Thioether-Thiolato Ligands. X-Ray Structure Determinations of (N M e ^ fN ^ 'S ^ j] and [Ni('S4-C 3')(PM e3)]*  
 Abstract    In order to elucidate specific properties o f nickel sulfur com plexes, redox and addition-elim-ination reactions o f [Ni('OS4')]2, [N i('N HS4')]2, [Ni('S5')], [Ni('S4-C 5')]2 and [Ni('S4-C 3')] were investigated ('OS4'2-= 2,2'-bis(2-m ercaptophenylthio)diethylether(2-), 'N HS4'2~ = 2,2'-bis(2-m ercaptophenylthio)diethylam ine(2-), 'S5'2-= 2,2'-bis(2-mercaptophenylthio)diethylsul-fid e (2 -), 'S4-C 5'2-= 1,5-bis(2-m ercaptophenylthio)pentane(2-), 'S4-C 3'2-= l,3-bis(2-m er-captophenylthio)propane(2-)). Cyclovoltammetry proves the complexes to be redox inactive between -1 .4 and +0.8 V vs. N H E. A bove +0.8 V the complexes are irreversibly oxidized, below -1 , 4 V desalkylation takes place and [Ni('S2')2]2" is formed. An X-ray structure analysis was carried out o f (N M e4)2[Ni('S2'):>], which shows a planar anion with the Ni center in a nearly perfect square planar coordination. Distances and angles are practically identical to those in the [Ni('S2')2] m onoanion. The complexes coordinate only phosphines as coligands, but thioether donors simulta­ neously decoordinate and, dependant o f reaction temperature, m ono-or trisphosphine com ­ plexes are formed. [Ni('S4-C 3')(PM e3)] was characterized by X-ray structure analysis and ex­ hibits a square pyramidal coordination geometry. 
  Reference    Z. Naturforsch. 46b, 1601—1608 (1991); eingegangen am 13. Mai 1991 
  Published    1991 
  Keywords    Nickel Sulfur Complexes, Redox and Addition Reactions, X-Ray 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1601.pdf 
 Identifier    ZNB-1991-46b-1601 
 Volume    46 
3Author    Dieter Sellmann, Helmut Schillinger, Falk KnochRequires cookie*
 Abstract    Säure-Base-und Redox-Reaktionen von [Ni('MeS2')2l mit H +, PM e3, N O + und NO . Röntgenstrukturanalyse von [Ni(PM e3)('M eS2')2l ('M eS2'~ = o-(M ethylthio)thiophenolat(l-)) Transition-M etal Complexes with Sulfur Ligands, LXXXVI*. Acid-Base and Redox Reactions of [Ni('MeS2')2] with H +, PM e3, N O + and NO. X-Ray Structure Determ ination of [Ni(PMe3)('MeS2')2] ('MeS2' -= o-(m ethylthio)thiophenolate(l-)) In order to elucidate specific properties o f nickel-sulfur com plexes, addition and substitu­ tion reactions o f [Ni('M eS2')2] (1) were investigated. 1 is rapidly hydrolyzed by aqueous HC1 yielding 'M eS2' -H and N i(II) ions. 1 coordinates phosphines as coligands, thioether donors decoordinate, however, simultaneously. The m onophosphine com plex [N i(PM e3)('M eS2')2] (2) was characterized by X-ray structure determination. It contains a square-planar N iS 3P unit and one decoordinated thioether group. Redox reactions o f 1 occur with N O + and N O , yield­ ing the binuclear nitrosyl complexes cis-and //-a/?s-[Ni(NO)('MeS-,')]2 (3) and the disulfide ['MeS2']2. 
  Reference    Z. Naturforsch. 47b, 748 (1992); eingegangen am 27. Novem ber 1991 
  Published    1992 
  Keywords    Nickel-Sulfur Complexes, Nitrosyl, Phosphine Ligands, X -R ay Structure 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0748.pdf 
 Identifier    ZNB-1992-47b-0748 
 Volume    47 
4Author    Martin Köckerling, Gerald HenkelRequires cookie*
 Title    Nickelkomplexe  
 Abstract    mit Thioether-Chelatliganden: Elektrochemische Eigenschaften und Kristallstrukturen von [Ni(MeSCH2CH2SMe)2 (NCS)2], [Ni(EtSCH2CH2SEt)2(NCS)2] und [Ni(MeSCH2CH2SMe)2Br2] Nickel Complexes with Chelating Thioether Ligands: Electrochemical Properties and Crystal Structures of [Ni(MeSCH2CH2SMe)2(NCS)2], [Ni(EtSCH2CH,SEt)2(NCS)2] and [Ni(MeSCH2CH2SMe)2Br2] interest in nickel complexes with sulfur donor ligands as models for the active sites of nickel-containing hydrogenases has prompted us to investigate the structural and elec­ trochemical behaviour of nickel complexes with bifunctional thioether ligands. Crystals of [Ni(MeSCH,CH,SMe),(NCS),] (1) and [Ni(EtSCH2CH,SEt)2(NCS)2], (2) are triclinic, space group Pi, Z = 1, 1: a = 7.293(3) A, b = 7.567(3) A, c = 8.784(3) A, a = 72.81(3)°, ß = 78.41(3)°, 7 = 85.14(3)°; 2: a = 8.611(1) A, b = 8.101(1) Ä, c = 9.163(1) ßrbÄ, a = 66.54(1)°, ß = 76.19(1)°, 7 = 67.88(1)ßrb°. [Ni(MeSCH2CH2SMe^Br2] (3) crystallizes in the mono­ clinic space group P2,/n, a = 6.757(2) A, b = 7.881(2) A, c = 14.674(4) Ä, ß = 94.05(2)°, Z = 2. In crystals of 1, 2 and 3 mononuclear neutral complex molecules are observed which have pseudo-octahedral rran5-NiS4L2 coordination sites. The cyclovoltammograms of 1 and 3 in MeCN (Ag/AgCl/KCl, 3 mol/1) show only irreversible oxidation waves at +837 mV for 1 and +846 mV for 3, respectively, which are characteristic features of NCSe and Bre ions. In addition, a reduction wave at +393 mV is observed in 3. No redox response is found in the potential region between -700 and +100 mV which is used by the NiFe hydrogenase enzymes. 
  Reference    Z. Naturforsch. 51b, 178—186 (1996); eingegangen am 18. Juli 1995 
  Published    1996 
  Keywords    Nickel-Sulfur Complexes, Thioether Ligands, Crystal Structure, Electrochemistry, Bioinorganic Chemistry Current 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0178.pdf 
 Identifier    ZNB-1996-51b-0178 
 Volume    51