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1Author    Klaus Diem, Thomas Hahn, Wilhelm Kuchen+, DietrichM. Ootz+, WolfgangPeter Poll, TommesRequires cookie*
 Title    Kristallstruktur von (CO)5CrPH2COOH und ab m/r/ö-Berechnung des hypothetischen freien Liganden [H2PCOOH]2 -ein Vergleich Crystal Structure of (C O )5CrPH2CO O H and ab initio Calculation of the Hypothetical Free Ligand [H2PC O O H ] 2 -a Comparison  
 Abstract    Crystal structure analysis of (C O)5CrPH2COOH (a = 1338.2, b = 622.6, c = 1161.5 pm, ß = 96,77°, P 2 1/c, Z = 4, R -0.0330) has shown the complex to be dimerized via hydrogen-bonds of the COOH group. Geom etrical parameters of the hypothetical free ligand [H2PCO O H ]2 were calculated using the HF/3-21 G*, HF/6-31G** and MP2-FU/6-31 G** basis sets. Bond lengths and bond angles o f the calculated free ligand are similar to those derived from the crystal structure analysis of the coordinated ligand and are not significantly influenced by coordination and/or intermolecular interactions. 
  Reference    Z. Naturforsch. 50b, 209 (1995); eingegangen am 7. September 1994 
  Published    1995 
  Keywords    Crystal Structure, Chromium Complex, Phosphinoformic Acid, Hydroxycarbonylphosphine 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0209.pdf 
 Identifier    ZNB-1995-50b-0209 
 Volume    50 
2Author    Udo Kunze, Hussain Jawad, Wolfgang Hiller, Regina NaumerRequires cookie*
 Title    Phosphinsubstituierte Chelatliganden, XIV [1] Wasserstoff-Brückenbindung in THF-Addukten von Tetracarbonylchrom-und -molybdänkomplexen mit P,S-koordinierten Phosphinothioformamid-Liganden. Kristallstruktur von [(CO) 4 Cr(PPh 2 C(S)NHMe)] THF Phosphine-Substituted Chelate Ligands, XIV [1] Hydrogen Bonding in THF-Adducts of Tetracarbonylchromium and -molybdenum Complexes with P,S-Coordinated Phosphinothioformamide Ligands. Crystal Structure of [(CO) 4 Cr(PPh 2 C(S)NHMe)] * THF  
 Abstract    The tetracarbonyl chromium and molybdenum P,S-chelate complexes la, b and 2a, b are obtained by low-temperature photolysis of the metal hexacarbonyls with the neutral phos-phinothioformamide ligands, Ph 2 PC(S)NHR (R = Me (a), Ph (b)), as stoichiometric 1/1 THF adducts. A weak N-H---O(THF) hydrogen bond is deduced from the ; H NMR spectra which show a collapse of the N-methyl doublet in la (T c -18 °C) but not in 2a. Unusually small P-C(S) couplings are observed in the 13 C{'H} NMR spectra. The N-methyl chromium complex la crystal-lizes in the triclinic space group P1 (Z = 2) with the lattice constants a = 1076.6(3), b = 1235.8(3), c = 915.1(3) pm, a = 97.99(4)°, ß = 92.73(5)°, y = 87.63(5)°. The planar thioamide unit adopts the Z configuration and is linked to the tetrahydrofuran molecule by a hydrogen bond (N-H1-031 164°) with an 0---H contact distance of 191 pm. 
  Reference    Z. Naturforsch. 40b, 512—517 (1985); eingegangen am 23. November 1984 
  Published    1985 
  Keywords    Hydrogen Bonding, THF-Adducts, Phosphinothioformamide Complexes, Crystal Structure, Chromium Complex 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0512.pdf 
 Identifier    ZNB-1985-40b-0512 
 Volume    40 
3Author    Albini, H. KischRequires cookie*
 Abstract    Chromium and tungsten carbonyls react with 3,3,4,4-tetramethyl-l,2-diazetine (1) or its mono-N-oxide (2) to form complexes (l)M(CO)5, (l)2M(CO)4, (l)M2(CO)io, (l)2M2(CO)8, (l)3M2(CO)6 or (2)M(CO)5 and (2)2M(CO)4, resp. In the reactions of 2 some deoxygenation affords complexes of 1 as by-products. The stability of these and other complexes of the N=N group is related to the ring size of the cyclic diazene ligand. 
  Reference    Z. Naturforsch. 37b, 468—472 (1982); received November 13 1981 
  Published    1982 
  Keywords    I, 2-Diazetines, 1, 2-Diazetine-N-oxide, Chromium Complexes, Tungsten Complexes 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0468.pdf 
 Identifier    ZNB-1982-37b-0468 
 Volume    37 
4Author    Marianne Baudler, Franz Salzer, Josef HahnRequires cookie*
 Title    Beiträge zur Chemie des Phosphors, 120 [1] Carbonyl-Triorganylcyclotriphosphan-Komplexe von Chrom und Wolfram Contributions to the Chemistry of Phosphorus, 120 [1] Carbonyl-Triorganylcyclotriphosphane Complexes of Chromium and Tungsten  
 Abstract    The reaction of triorganylcyclotriphosphanes, (RP)3 (R = i-Pr, £-Bu), with metal carbonyl-tetrahydrofuran complexes, M(CO)sTHF (M = Cr, W), yields the novel mono-nuclear and binuclear cyclotriphosphane-carbonylmetal complexes (RP)3M(CO)5 (R = i-Pr, *-Bu; M = Cr, W) 1-4 and (RP)3[M(CO)5]2 (R = t-Pr, M = Cr) 5, respectively. They are remarkably stable both thermally and to oxidation. Their structures have been elucidated by 31 P NMR spectroscopic investigations. The cyclotriphosphane functions as a 2-or a 4-electron donor, respectively, and behaves as a Ti-acceptor comparable to PI13P. Bei unseren Untersuchungen über Triorganyl-cyclotriphosphane (RP)3 [2, 3] konnten in den letz-ten Jahren bemerkenswert beständige Vertreter dieser Substanzklasse in reiner Form dargestellt werden [4-6, 1]. In diesem Zusammenhang interes-sierte die Frage, inwieweit diese Verbindungen in der Lage sind, an ein Übergangsmetall zu koor-dinieren [7]. Der einzige bislang bekannte Cy-clotriphosphan-Komplex, das Triphenylcyclotri-phosphan-tris(cyclopentadienyldicarbonylmangan), (C6H5P)3[Mn(CO)2CöH5]3, wurde unerwartet beim Versuch der Darstellung eines Phosphiniden-Kom-plexes erhalten [10]. Im folgenden wird über Syn-these und Eigenschaften der ersten ein-und zwei-kernigen Übergangsmetall-Komplexe mit Triorga-nylcyclotriphosphan-Liganden berichtet. Präparative Ergebnisse 
  Reference    Z. Naturforsch. 37b, 1529—1533 (1982); eingegangen am 26. Juli 1982 
  Published    1982 
  Keywords    Tri-isopropylcyclotriphosphane, Tri-£er£-butylcyclotriphosphane, Cyclotriphosphane Complexes, Chromium Complexes, Tungsten Complexes 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1529.pdf 
 Identifier    ZNB-1982-37b-1529 
 Volume    37 
5Author    Karl-Friedrich Tebbe, Magda FehérRequires cookie*
 Title    Beiträge zur Strukturchemie phosphorhaltiger Ketten und Ringe, IX [1]  
 Abstract    Die Molekül-und Kristallstruktur von Tri-terf-butylcyclotriphosphan-pentacarbonyl-chrom(O), [(f-BuP)3Cr(CO)5] Structural Chemistry of Phosphorus-Containing Chains and Rings, IX [1] The M olecular and Crystal Structure of Tri-/m -butylcydotriphosphane-pentacarbonyl-chrom ium (0), [(r-BuP)3C r(C O)5] The structure of [(f-BuP)3C r(C O)5], C 17CrH2705P3, has been determ ined by single crystal X-ray techniques, solved by 'direct m ethods', and refined to R = 0.048, wR = 0.050 for 3657 reflections by blocked least squares. The com pound crystallizes in the space group P 2x/c with a = 1664.9 pm , b — 916.5 pm , c = 3089.8 pm, ß = 91.45° and Z = 8 formula units. The structure consists of two crystallographically independent but structurally nearly identical m ononuclear [(r-BuP)3C r(C O)5] complexes with the three-m em -bered ring (/-BuP)3 as an unidentate a-donor ligand. Com pared to the free molecule (r-BuP)3 the cyclophosphane ligand is slightly distorted on account of its coordination to the C r(C O)5-group. 
  Reference    (Z. Naturforsch. 39b, 37—42 [1984]; eingegangen am 8. Juli 1983) 
  Published    1984 
  Keywords    Tri-ter/-butylcyclotriphosphane-pentacarbonyl-chrom ium (0), Tri-tert-butylcyclotriphospane, Cyclotriphosphane Complex, Chromium Complex, Crystal Structure 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0037.pdf 
 Identifier    ZNB-1984-39b-0037 
 Volume    39 
6Author    Z. NaturforschRequires cookie*
 Title    Heterometallische  
 Abstract    Mehrkernkomplexe von Zink und Cadmium mit ds-[C r(O H)2(en)2]+-Liganden H eterom etallic Polynuclear Com plexes of Zinc and Cadm ium with c/s-[C r(O H)2 (en)2]+ Ligands Frank R om inger, U lf Thew alt* A series of polynuclear heterometallic complexes containing chromium and zinc or cadmium were prepared by the reaction of c/s-[CrCl2(en)2]Cl and a zinc or cadmium salt in water and the molecular and crystal structures of 1 to 5 determined by X-ray structure analyses. The products contain chelating or bridging c7s-[Cr(OH)2(en)2]+ groups. For the zinc complexes a tetrahedral coordination is observed, and the [Cr(OH)2(en)2]+ units are found to act as bridges. |[Z nC l2(//-0H)C r(en)2(/u-0H)]C104]" (1) has a chain polymeric structure. [{ZnCl2(y'/-OH)Cr(en)2(//-0 H)} 2]C12 (2) has a cyclic structure. In the case of the cadmium complexes the [Cr(OH)2(en)2]+ units act as chelating ligands. For the three cadmium complexes [Cd3(/./.-Cl)4Cl4{Cr(/^3-OH)( 
  Reference    Z. Naturforsch. 51b, 1716—1724 (1996); eingegangen am 16. Juli 1996 
  Published    1996 
  Keywords    Zinc Complexes, Cadmium Complexes, Chromium Complexes, Hydroxo Bridge, Heterome­ tallic Compounds 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1716.pdf 
 Identifier    ZNB-1996-51b-1716 
 Volume    51 
7Author    Hans-Jürgen Plinta, Ion Neda, Reinhard SchmutzlerRequires cookie*
 Title    .3-Dimethyl-l,3-diaza-2-R-5,6-benzo-2 A3-phosphorinan-4-one (R = F, Me2N, 2-Methylpiperidino, MeC(: 0 ) N H -) als Liganden in Übergangsmetallkomplexen; Synthese und Struktur von Dichloro-Platin(II)-und Tetracarbonyl-Metall(O)- Koordinationsverbindungen (Metall = Cr, Mo und W) 1.3-Dimethyl-l,3-diaza-2-R-5,6-benzo-2/l3-phosphorinan-4-ones (R = F, Me2N, 2-Methylpiperidino, MeC(: 0 ) N H -) as Ligands in Transition-Metal Complexes; Synthesis and Structure o f Dichloro-Platinum(II)-and Tetracarbonyl-Metal(O) Coordination Compounds (Metal = Cr, Mo and W)  
 Abstract    -2-fluoro-5,6-benzo-l,3,2-phosphorinane-4-one (1) reacted with (COD)PtCl2 (COD = 1,5-cyclooctadiene) or K2PtCl4 to give the c/s-dichloro-platinum(II) complex (2). The reactions of 1 with the tetracarbonyl norbornadiene derivatives of Cr, Mo and W furnished the complexes 3 -6 . In the case of the chromium and tungsten complexes the trans-isomers 3 and 6 were formed, due to a c/s-?ra«s-isomerization. Room temperature and low temperature 3IP NMR spectra of a mixture of 5 and 6 show no significant temperature dependence of the cis-trans equilibrium. The reaction of 1 with the pentacarbonyl tetrahydro-furan derivative of W led to the product 7. The spirophosphoranes 8 and 9 were obtained in low yields. The analogous reactions of 10, 15 and 20 with (COD)PtCl2 and the tetracarbonyl norbornadiene derivatives of Cr and Mo furnished the coordination compounds 1 1 -1 4 , 16-18, 21 and 23. In the case of all chromium complexes only the /rarcs-isomers 11,16 and 21 were formed, whereas in the case of molybdenum m-fraH.s'-isomer mixtures 12 and 13, as well as 17 and 18 were obtained. An attempt to obtain the cis-isomer of the molybdenum complex 22 failed. In the case of platinum the expected m-complexes 14 and 23 were formed, while the attempted synthesis of 19 was unsuccessful. All these results are interpreted in terms of both steric and electronic factors. The ligands 1, 10, 15 and 20 coordinate via phosphorus. The va­ lidity of the concept of hard and soft acids and bases (HSAB) was confirmed. The characteri­ zation of 2 -7 , 1 1-14, 16-18, 21 and 23 rests, especially, on their 'H, 13C and 3IP NMR spec­ tra, and their mass and infrared spectra. 31p -3,p coupling constants 2/(PP) for the cis-coordi­ nated complexes 4, 5 and 14 involving two equivalent phosphorus ligands are also reported. 
  Reference    (Z. Naturforsch. 49b, 100—110 [1994]; eingegangen am 17. Mai 1993) 
  Published    1994 
  Keywords    Platinum Complexes, Chromium Complexes, Molybdenum Complexes, Tungsten Complexes, NMR Spectra 1, 3-Dimethyl-l, 3-diaza 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0100.pdf 
 Identifier    ZNB-1994-49b-0100 
 Volume    49