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1Author    NicholasC. Norman, PeterM. WebsterRequires cookie*
 Title    The Synthesis of Some Cyclopentadienyliron-Indium Complexes  
 Abstract    Treatm ent o f indium trichloride with three equivalents of the cyclopentadienyliron carbonyl anions, [F e(C O)2(?7-C5H 4R)] (R = H, Me) affords the tri-iron indium com plexes [In {F e(C O)2(//-C 5H 4R)},] (R = H. Me) as dark red crystalline materials. Both com pounds were characterized by spectroscopic and analytical methods. Infrared spectroscopy indicates that both com plexes are undissociated in solution in contrast to previously reported analogous m olybdenum containing species. 
  Reference    (Z. Naturforsch. 44b, 91 [1989]; received August 9. 1988) 
  Published    1989 
  Keywords    Synthesis Iron, Indium, Cyclopentadienyl, Carbonyl 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-0091.pdf 
 Identifier    ZNB-1989-44b-0091 
 Volume    44 
2Author    Ralph Bergs, Roland Krämer, Michael Maurus, Bernhard Schreiner, Reinhold Urban, ChristopherM. Issling, Kurt Polbom, Karlheinz Siinkel, Wolfgang BeckRequires cookie*
 Title    Metallkomplexe mit biologisch wichtigen Liganden, LXXXIV [1] Halbsandwich-Komplexe von Rhodium(III), Iridium(III), Cobalt(III), Ruthenium(II), Ruthenium(III) und Chrom(III) mit Aminosäureester-Liganden Metal Complexes with Biologically Important Ligands, LXXXIV [1] Half-Sandwich Complexes o f Rhodium(III), Iridium(III), Cobalt(III), Ruthenium(II), Ruthenium(III) and Chromium(III) with Amino Acid Ester Ligands  
 Abstract    A series of cyclopentadienyl and pentamethylcyclopentadienyl complexes of cobalt, rhodium, iridium, ruthenium and chromium with a-amino-acid esters (L) as ligands was prepared and characterized: Cp*(Cl)2M(L) (1, 2: M = Rh, Ir), Cp(I)2Co(L) (4), [Cp(Ph3P)2Ru(L)]+BF~ (6), [Cp(OC)(Ph3P)Ru]+BF^ (7) and the paramagnetic compounds Cp*(Cl)2Ru(L) (8) and Cp(Br)2Cr(L) (9). AlaOMe and HisOMe form N ,0 and N,N chelate complexes [Cp*(Cl)M(alaOMe)]+BF~ (3: M = Rh, Ir), [Cp(I)Co(hisOMe)]+BF4. Cp*Co(CO)I2 and GlyOMe gave the N,0-dipeptide ester complex Cp*(I)Co(glyglyOMe)]+BF^ (5). The crystal structures of Cp(I)2Co(glyOEt) and Cp*(Cl)2Ru(alaOMe) were determined by X-ray diffrac­ tion. The complexes 1 and 2 undergo ester exchange reactions with CD3OD. [Cp*MCl2]2 (M = Rh, Ir) catalyze the exchange of the ethoxy group in Me2NCH2C 0 2Et by CD3OD. 
  Reference    Z. Naturforsch. 51b, 187—200 (1996); eingegangen am 21. Juli 1995 
  Published    1996 
  Keywords    Transition Metal Complexes, Cyclopentadienyl, a-Amino Acid Ester 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0187.pdf 
 Identifier    ZNB-1996-51b-0187 
 Volume    51 
3Author    Markus Häp, TheoG. Illes, Thomas Kruck, Karl-Friedrich TebbeRequires cookie*
 Title    Dichloro  
 Abstract    [bis(775-2,4-cyclopentadien-l-yl)aIkylphosphan]zirconium: PR(C5H4)2 ZrCl2 ; R = Me, Et, 'Pr, 'Bu Dichloro[bis(/7r'-2 ,4 -cyclopentadien-l-yl)alkylphosphine]zirconium: PR(C5H4)7ZrCL; R = Me, Et, 'Pr, ?Bu A series of new ansa-zirconocene dichloride compounds [PR(C5H4)2ZrCl2: R = Me (5), Et (6), 'Pr (7), ?Bu (8)] with phosphorus as bridging atom between the cyclopentadienyl rings have been prepared, isolated, and characterised by 'H, i3C, 31P NMR spectroscopy, mass spectrometry and elemental analysis. The X-ray structure of 5 is reported. 
  Reference    Z. Naturforsch. 54b, 482—486 (1999); eingegangen am 22. Dezember 1998 
  Published    1999 
  Keywords    Zirconium Ansa-Metallocene, Cyclopentadienyl, Phosphine, Crystal Structure 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0482.pdf 
 Identifier    ZNB-1999-54b-0482 
 Volume    54 
4Author    O. P. Pandey3, S. K. Sengupta3, B. P. Baranwal3, SarojK. Shuklab, Alpana Bhatt3Requires cookie*
 Title    Mono-and Bis(cyclopentadienyl)hafnium(IV) Derivatives with Higher Fatty Acids  
 Abstract    The reactions o f Cp2HfCh with som e higher monocarboxylic acids having straight chains, caprylic (C8H16O2), lauric (C12H24O2), myristic (C14H28O2), palmitic (C16H32O2), stearic (C18H36O2), and behenic (C22H44O2) acid, have been studied in anhydrous tetrahydrofuran in 1:1 and 1:2 molar ratios, respectively. The reaction products isolated, o f types Cp2Hf(L)Cl, CpHf(L)2Cl (LH represents different carboxylic acids), have been characterised by conductivity and magnetic susceptibility measurements and spectral (infrared, electronic, *H NMR and 13C NMR) data. The bonding o f the carboxylato ligand in these complexes has been discussed and plausible structures have been established. 
  Reference    Z. Naturforsch. 56b, 141—145 (2001); received April 28 2000 
  Published    2001 
  Keywords    Cyclopentadienyl, Hafnium(IV), Fatty Acids 
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 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0141.pdf 
 Identifier    ZNB-2001-56b-0141 
 Volume    56 
5Author    Helmut Werner, JoachimM. AhrRequires cookie*
 Title    Cyclopentadienyl-, Indenyl-und Trifluormethylcyclopentadienyl-Cobalt- Komplexe mit Akzeptor-substituierten Olefinen als Liganden Cyclopentadienyl, Indenyl and Trifluoromethylcyclopentadienyl Cobalt Complexes with Acceptor-Substituted Olefins as Ligands  
 Abstract    The complexes C5H 5C o(P M e3)2 (1), C9H 7C o(P M e3)2 (2) and (C5H4C F 3)C o(PM e3)2 (3) react with m ono-and disubstituted ethenes such as styrene, acrylic acid methylester, methylvinyl-ketone, acroleine, acrylic acid amide, acrylonitrile, maleic anhydride, maleic and fumaric acid dimethylester, and fumaric dinitrile to give the olefin(phosphane)cobalt compounds (ring)Co(PM e3)(olefin) (4 -3 2) in good to excellent yields. With acrylonitrile, two different rotamers are obtained which indicates that there is a considerable energy barrier for rotation around the m eta l-o lefin bond. The reactions o f 1 and 3 with maleic acid dimethylester (M D E) lead not only to the formation o f the expected products (ring)Co(PM e3)(M D E) (22, 23) but also to the thermodynamically favored isomers (ring)Co(PM e3)(F D E) (24, 26) contain­ ing fumaric acid dimethylester (F D E) as ligand. A similar isomerization has been observed upon treatment o f 2 and 3 with fumaric dinitrile (F D N) which gives besides the com ­ plexes (ring)Co(PM e3)(F D N) (29, 31) also the maleic dinitrile (M D N) derivatives (ring)Co(PM e3)(M D N) (30, 32). The olefin(trim ethylphosphane)cobalt compounds are sur­ prisingly inert and neither on photolysis nor on heating give the isomeric hydrido(vinyl)metal complexes. 
  Reference    Z. Naturforsch. 46b, 1364—1376 (1991); eingegangen am 28. Mai 1991 
  Published    1991 
  Keywords    Cyclopentadienyl, Indenyl, Trifluoromethylcyclopentadienyl Cobalt Complexes, Ligand Displacement Reactions, Hindered R otation 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1364.pdf 
 Identifier    ZNB-1991-46b-1364 
 Volume    46 
6Author    Fausto Calderazzo, Guido Pam, M. Artin Sperrlea, Ulli EnglertbRequires cookie*
 Title    Electron-and Ligand-Transfer Reactions Involving N,N-Dialkylcarbamates. Synthesis and Molecular Structure of V jIf^ -C C sH ^ yC ^ C N t^ H ^ h  
 Abstract    Electron-and ligand-transfer reactions o f low-valent organom etallic com pounds o f titanium and vanadium with N,N-dialkylcarbam ates o f titanium(IV) are reported. The reaction o f VCp2 (Cp = ^-cyclopentadienyl) with T i(0 2C N E t2)4 affords, inter alia, the dimeric vana-dium(III) N ,N-diethylcarbam ato derivative V2Cp2(0 2C N E t2)4 which has been studied by X-ray diffraction methods. Crystal data; triclinic, space group P i; a = 10.802(2), b = 11.004(1), c = 8.960(1) Ä; a = 112.879(9), ß = 102.66(1), y = 102.42(1)°; V = 902.3(6) A 3; Z = 1; F(000) = 368, gcalc = 1.282 g em -3; n = 5.47 cm -1. It consists o f a centrosymmetric dimer, the two vanadium atom s being surrounded by four oxygen atom s o f the bridging N,N-diethylcar-bamato groups and by the cyclopentadienyl ligand. The metal atom exhibits a distorted square-pyramidal coordination geometry with the oxygen atom s occupying the basal plane. The reaction o f TiCp2(CO)2 or Vmes2 (mes = //6-l,3 ,5 -M e3C6H 3) with T i(0 2C N E t2)4 affords Ti(III) and V(III) N,N-diethylcarbam ato derivatives by a simultaneous ligand-and electron-transfer reaction. M agnesium N ,N-diisopropylcarbam ate, M g (0 2CNPr'2)2, has been obtained by a ligand-transfer reaction between M gCp2 and T i(0 2CNPr'2)3. 
  Reference    Z. Naturforsch. 47b, 389 (1992); received A ugust 9 / October 16 1991 
  Published    1992 
  Keywords    N, N-D ialkylcarbam ates, Vanadium, Titanium, Cyclopentadienyl, Electron Transfer 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0389.pdf 
 Identifier    ZNB-1992-47b-0389 
 Volume    47