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'Chelate Ligands' in keywords
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1981 (2)
1Author    Santiago Garcia-Yustea, KonradW. Hellmanna, LutzH. Gadeb, IanJ. Scowenc, Mary McpartlincRequires cookie*
 Title    Bis[l,3-bis(diphenylmethylsilylamido)propane]zirconium: A Spirocyclic Complex Containing a Sterically Demanding Chelating Amido Ligand  
 Abstract    Lithiation of the diamine CH2(CH2NHSiMePh2)2 using »-butyl lithium and subsequent reaction with zirconium tetrachloride yielded the bis(chelate)-amidozirconium complex [Zr{CH2(CH2NSiMePli2)2 }2]-The spirocyclic molecule has a distorted tetrahedral coordi­ nation at the zirconium centre with overall C2 symmetry broken only by the relative orientation of four phenyl rings. The bulky diphenylmethylsilyl substituents at the amido-N functions as well as the ligand backbone sterically protect the metal centre and render it inert towards conproportionation with zirconium chloride. 
  Reference    Z. Naturforsch. 54b, 1260—1264 (1999); received July 2 1999 
  Published    1999 
  Keywords    Silylamides, Zirconium Amide, Chelate Ligands, Crystal Structure 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1260.pdf 
 Identifier    ZNB-1999-54b-1260 
 Volume    54 
2Author    Udo Kunze, Antonios AntoniadisRequires cookie*
 Title    Phosphinsubstituierte Chelatliganden, II [1] Thiocarbamoylphosphinsulfid-und -oxid-Komplexe des Mangans und Rheniums Phosphine Substituted Chelate Ligands, II [1] Thiocarbamoylphosphine Sulfide and Oxide Complexes of Manganese and Rhenium  
 Abstract    Thiocarbamoylphosphine sulfides la-c and oxides 2a-c are ambidentate chelating ligands which may form monomeric or dimeric complexes with carbonylmetal halides. The reaction of la-c with ClMn(CO)s and ClRe(CO)s yields the monomeric cw-tetracarbonyl complexes 3a-c and 4a-c with S,S'-coordination. The phosphine oxides 2a-c first form tetracarbonyl complexes which dimerize spontaneously under loss of CO to give the anfi-/ac-tricarbonyl complexes 6a-c and 6 a with bridging three-coordinate sulfur. On refluxing in n-hexane solution, 8a-c and 4b, c are converted into the corresponding dimers 7a-c and 8 b, c. Dissolving of 7 b, c in CH2C12 leads to re-formation of 8 b, c, the free ligands lb, c and inorganic manganese compounds. 
  Reference    Z. Naturforsch. 36b, 1117—1124 (1981); eingegangen am 21. Mai 1981 
  Published    1981 
  Keywords    Chelate Ligands, Thiocarbamoylphosphine Sulfide, Thiocarbamoylphosphine Oxide, Manganese Complexes, Rhenium Complexes 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1117.pdf 
 Identifier    ZNB-1981-36b-1117 
 Volume    36 
3Author    Udo Kunze, Antonios AntoniadisRequires cookie*
 Title    Phosphinsubstituierte Chelatliganden, III [1] r/ 5 -Cyclopentadienyleisencarbonyl-Koraplexe mit Thiocarbamoylphosphin-, -phosphinsulfid-und -phosphinoxid-Liganden Phosphine Substituted Chelate Ligands, III [1] r/ 5 -Cyclopentadienyliron Carbonyl Complexes with Thiocarbamoyl-Phosphine, -Phosphine Sulfide and -Phosphine Oxide Ligands  
 Abstract    The reactions of N-silylated and free diphenylphosphino thioformamides, Ph 2 PC(S)NRR' (R = Ph, Me, Et; R' = MeaSi, H), with CpFe(CO)2l yield, by displacement of one equiva-lent CO, both red-brown P,S-coordinated chelate complexes 1 a-c and green P-coordinated iodo complexes 2a-c. With thiocarbamoylphosphine sulfides, Ph 2 P(S)C(S)NHR (R — Ph, Me), the S,S'-coordinated chelate complexes 3a, b are obtained. The corresponding phos-phine oxides only form deeply coloured, weak 1/1 adducts 4a, b with CpFe(CO)2l. The course of the nucleophilic substitution of CpFe(CO) 2 X (X = Cl, Br, I) by N-silyl phos-phino thioformamides reveals a significant dependence on the halogen employed. For X = Cl, elimination of RNCS and formation of the cationic diiron complex [CpFe(CO)2]2~ PPh2 + Cl _ (5 a) takes place, whereas forX = Brno reaction occurs at room temperature. Mechanistic reasons for this unexpected behaviour are discussed. 
  Reference    Z. Naturforsch. 36b, 1588—1594 (1981); eingegangen am 27. Juli 1981 
  Published    1981 
  Keywords    Chelate Ligands, Cyclopentadienyliron Complexes, Thiocarbamoylphosphine, Thiocarbamoylphosphine Sulfide, Thiocarbamoylphosphine Oxide 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1588.pdf 
 Identifier    ZNB-1981-36b-1588 
 Volume    36 
4Author    Udo Kunze, Antonios AntoniadisRequires cookie*
 Title    Phosphinsubstituierte Chelatliganden, IV [1] Neue Diphenylphosphinoformamid-Komplexe des Mangans und Eisens Phosphine Substituted Chelate Ligands, IV [1] New Diphenylphosphino Formamide Complexes of Manganese and Iron  
 Abstract    The phosphino and (thio)phosphoryl formamides la, b, 2a-c, 3a, b, 4a, b which were partially unknown are synthesized by various methods, and their reactions with carbonyl-metal halides of manganese and iron are described. The formation of the P,N-and S,N-coordinate chelate complexes, (CO)4MnL (5 a, 8a), is limited to the N-phenyl derivatives la and 4a. With L = 2a, b, the unidentate P-coordination predominates. Thus, the carbonylmetal halide complexes cis-(CO)4Mn(X)L (6a, b: X = CI, 7a, b: X = Br) and 7? 5 -C5H5(CO)Fe(X)L (9a, b: X = I, 10a, b: X = Br) are obtained. Due to the low stability of the formamide complexes, their formation is always accompanied by isocyanate elimi-nation as a side-reaction. 
  Reference    Z. Naturforsch. 37b, 560—567 (1982); eingegangen am 17. November 1981 
  Published    1982 
  Keywords    Chelate Ligands, Phosphino Formamide, Manganese Complexes, Iron Complexes, Isocyanate Elimination 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0560.pdf 
 Identifier    ZNB-1982-37b-0560 
 Volume    37 
5Author    Antonios Antoniadis, Wolfgang Hiller, Udo Kunze, Schaal Herberth, Joachim SträhleRequires cookie*
 Title    Phosphinsubstituierte Chelatliganden, VI [1] Kristallstrukturen von Tetracarbonyl(diphenylphosphino -N-phenylthioformimidato -P,S )mangan(I) und Tetracarbonyl(diphenylthiophosphoryl-N-phenylthioformimidato-S,S')mangan(I) Phosphine Substituted Chelate Ligands, VI [1] Crystal Structures of Tetracarbonyl(diphenylphosphino-N-phenylthioformimidato-P,S)- manganese(I) and Tetracarbonyl(diphenylthiophosphoryl-X-phenylthioformimidato-S.S')- manganese(I)  
 Abstract    The phosphinothioformimidato complex (CO)4MnSC(NPh)PPli2 (1) crystallizes tri-clinic in the space group PI with lattice constants a = 989.4(9) pm, b — 1042.0(8) pm, c = 1088.5(8) pm, a = 91.45(4)°, ß = 97.10(4)°, y = 100.53(5)°. The four-membered chelate I 1 ring Mn-P-C-S is folded over the P-S edge by a dihedral angle of 167.1°. The crystal I 1 system of the thiophosphoryl thioformimidato complex (CO)4MnSC(NPh)P(S)Ph2 (2) is monoclinic with the space group P2i/c, and the lattice parameters are a = 1109.5(3) pm, b = 966.0(3) pm, c = 2256.7(3) pm, 0=103.11(2)°. The chelate ligand is linked to the metal by two S atoms forming a five-membered ring in the "envelope" conformation with the thiophosphoryl S atom at the apical position. 
  Reference    Z. Naturforsch. 37b, 1289—1293 (1982); eingegangen am 7. Mai 1982 
  Published    1982 
  Keywords    Crystal Structure, Chelate Ligands, Phosphinothioformimidate, Thiophosphorylthioformimidate, Manganese Complexes I 1 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1289.pdf 
 Identifier    ZNB-1982-37b-1289 
 Volume    37 
6Author    Karl-Heinz Thiele, Annett Scholz, Joachim Scholz, Uwe Böhme, R. Hett Kempe, Joachim SielerRequires cookie*
 Title    Iminoacetylacetonat-Komplexe der Lanthanoide: Synthese, Eigenschaften und Struktur Im inoacetylacetonate Complexes of Lanthanides: Synthesis, Properties and Structure  
 Abstract    The reactions of (^5-C5Me5)2Ln(J u-Cl)2ML2 (Ln = Y, La, Lu; M = Li, K; L = Et20 , dme) 3 a —c with the sodium iminoacetylacetonates 2 a -b yield monomeric metallocene chelate com­ plexes (?75-C5Me5)2Ln(OCM e=CHCM e=NR), (Ln = Y, La, Lu; R = C6H5, C6H4-4-Me) 4 a -d which have been characterized by IR, NM R and mass spectrometry. In the case of the lan­ thanum complex 4c, the chelating structure was confirmed by an X-ray structure analysis. 4c crystallizes monoclinically in space group P2,/c with a = 10.232(3), b = 10.216(1), c = 29.047(7)Ä, a = y = 90.0°, ß = 97.76(3)°, Z = 4, and R = RK = 0.0378 for 4026 observed reflections. The new complexes are sensitive to oxygen and moisture and soluble in all com­ mon organic solvents. 
  Reference    Z. Naturforsch. 48b, 1753—1759 (1993); eingegangen am 24. Juni 1993 
  Published    1993 
  Keywords    Lanthanide Iminoacetylacetonate Complexes, Metallocene Complexes, Chelate Ligands, MOCVD Precursor 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1753.pdf 
 Identifier    ZNB-1993-48b-1753 
 Volume    48