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1Author    M. =. Cr, Mo, W., Norbert Kuhn, Martin Göhner, Manfred SteimannRequires cookie*
 Title    Über Komplexe des Typs {(PhC=C)3P}3M(CO)3 (M = Cr, Mo, W) On Complexes of the Type {(PhC=C)3P}3M(CO)3 (  
 Abstract    The tris(alkinyl)phosphine complexes {(PhC=C)3P}3M(CO)3, M = Cr (3a), Mo (3b), W (3c), are obtained from P(C=CPh)3 and (C6H 15N3)M(CO)3 (C6H 15N3 = 1,3,5-trimethyl-1,3,5-triazacyclohexane) as stable yellow solids in good yields. While IR data indicate significant acceptor properties of the phosphane ligands, the X-ray structure analysis of 3c also allows the discussion of weak donor interactions. 
  Reference    (Z. Naturforsch. 56b, 95—99 [2001]; eingegangen am 22. September 2000) 
  Published    2001 
  Keywords    Chromium, Molybdenum, Tungsten 
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 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0095.pdf 
 Identifier    ZNB-2001-56b-0095 
 Volume    56 
2Author    Moisés Morán, Miguel GayosoRequires cookie*
 Title    Reactions of Dicyanogen and Cyanogen Halides with the Biscyclopentadienyls of Vanadium and Chromium  
 Abstract    The oxidative addition of dicyanogen, (CN)2, and of the cyanogen halides, XCN (X = Cl, Br or I), to the biscyclopentadienyl compounds of vanadium and chromium, (/y-C^Hs^M (M = V or Cr), leads to the formation of (/?-C5H5)2MX(CN) (X = CN, Cl, Br, I; M = V or Cr). The synthesized compounds have been characterized by elemental analyses, IR and EPR spectra, and determinations of the magnetic moments. 
  Reference    Z. Naturforsch. 38b, 177—180 (1983); received July 9/September 29 1982 
  Published    1983 
  Keywords    Cyanogen Halides, Vanadium, Chromium 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0177.pdf 
 Identifier    ZNB-1983-38b-0177 
 Volume    38 
3Author    HerbertW. Roesky, Michael Zimmer, Regine Herbst, GeorgeM. Sheldrick, Prof Heinz, G. WagnerRequires cookie*
 Title    N,N'-Bis(diphenyIphosphino)-S,S-dimethylsulfodiimin — ein Ligand für cyclische Übergangsmetallkomplexe N,N'-Bis(diphenylphosphino)-S,S-dimethylsulfodiimine — a Ligand for Cyclic Transition Metal Complexes  
 Abstract    Me 2 SN 2 P 2 Ph 4 M(CO) 4 complexes (1) (M: la Cr, lb Mo, lc W) have been synthesized from Me 2 S(NPPh 2) 2 and C 7 H s M(CO) 4 . la—lc are stable at room temperature, lb crystallizes in the space group P2,2,2 with cell constants a = 2486.3(2); b = 1488.8(1); c = 882.0(1) pm. 
  Reference    Z. Naturforsch. 43b, 933—936 (1988); eingegangen am 26. Februar 1988 
  Published    1988 
  Keywords    Crystal Structure, Chromium, Molybdenum, Tungsten 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0933.pdf 
 Identifier    ZNB-1988-43b-0933 
 Volume    43 
4Author    H., M. Üller-Buschbaum, L. WalzRequires cookie*
 Title    Einkristallröntgenstrukturanalyse an Quecksilberchromat(VI)  
 Abstract    g 3 0 2 C r 0 4 Single C rystal X -Ray S tructure D eterm ination of a M ercury C hrom ate(V I): H g30 2C r 0 4 Th. H an sen , H k. Single crystals of Hg3C r0 6 have been prepared by high pressure techniques (3600 bar oxygen, 600 °C). Hg3C r06 crystallizes with trigonal symmetry, space group D |-P 3 212, a = 7.137(1), c = 10.017(2)Ä, Z -3. Nearly linear O -H g -O dumb-bells are connected in planes, forming strongly puckered nets of six-membered rings. Each Hg60 6 ring is centered by a C r04 tetrahedron; the C r04 tetrahedra are arranged in two equally occupied split positions. 
  Reference    (Z. Naturforsch. 50b, 47—5 [1995]; eingegangen am 2. August 1994) 
  Published    1995 
  Keywords    Mercury, Chromium, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0047.pdf 
 Identifier    ZNB-1995-50b-0047 
 Volume    50 
5Author    Herbert Binder, Dieter SellmannRequires cookie*
 Title    Röntgen-photoelektronenspektroskopische Untersuchungen an Pentacarbonyl- Chrom-und -Wolfram-Komplexen mit Stickstoffliganden c X-ray Photoelectron Studies of Pentacarbonyl Chromium and Tungsten Complexes with Nitrogen Ligands  
 Abstract    The ionization energies of some chromium and tungsten pentacarbonyl complexes of the type [M(CO)5] xL (L = N2H2, N2H4, NH3; x = 1 or 2 for N2H4 or a; = 1 for N2H2) are reported. The results are discussed in terms of the effects of tr-donor and 7r-acceptor bonds on XPS data. Satellite lines, which can be explained in terms of a shake-up process, give information about the nature of the metal-ligand bond. These shake-up processes are, to a large extent, specific to the atoms of the acceptor groups. The spectroscopic and chemical importance of multi-peak structures of XPS bands is emphasised. 
  Reference    Z. Naturforsch. 33b, 173—179 (1978); eingegangen am 21. Dezember 1977 
  Published    1978 
  Keywords    X-ray, PE Spectra, Monosubstituted Pentacarbonyls, Chromium, Tungsten 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0173.pdf 
 Identifier    ZNB-1978-33b-0173 
 Volume    33 
6Author    Hk Müller-Buschbaum, K. SanderRequires cookie*
 Title    Zur Kristallstruktur von Sr6(Cr04)3Cl On the Crystal Structure of Sr5(Cr04)3Cl  
 Abstract    Single crystal X-ray investigation shows that Sr5(Cr04)3Cl is not isotypic with the apatite structure as being affirmed up to now. Chlorine occupies a position other than z = 0.250 implying the lower symmetry Cg-P63. As a consequence one strontium coordination sphere changes from octahedral to trigonal prismatic. 
  Reference    Z. Naturforsch. 33b, 708—710 (1978); eingegangen am 12. April 1978 
  Published    1978 
  Keywords    Chlorine, Chromium, Oxygen, Strontium, Crystal Structure 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0708.pdf 
 Identifier    ZNB-1978-33b-0708 
 Volume    33 
7Author    ErnstOtto Fischer, FranzJ. GammelRequires cookie*
 Title    Übergangsmetall-Carbin-Komplexe, L [1] Darstellung und nukleophile Substitution von Tetracarbonyl(organylcarbin)tetrafluoroborato-metall-Komplexen Transition Metal Carbyne Complexes, L [1] Preparation and Nucleophilic Substitution of Tetracarbonyl(organylcarbyne)tetrafluoroborato Metal Complexes  
 Abstract    Pentacarbonyl[methoxy(organyl)carbene]chromium complexes react in boron tri-fluoride dimethyletherate in the presence of BF3 to form tetracarbonyl(organylcarbyne)-tetrafluoroborato complexes of chromium. In the analogous tungsten complex BF4(CO)4WCC6Hs the BF4--ligand is displaced by nucleophilic reagents. With As(C6H5)3 and <-C4H9NC the cationic derivatives [As(C6H5)3(CO)4WCC6H5][BF4] as well as [<-C4H9NC(CO)4WCC6H5][BF4] are obtained. Die Umsetzung von Pentacarbonyl[alkoxy(orga-nyl)carben]-Komplexen mit Bortrihalogeniden BX3 in Pentan bei tiefen Temperaturen führt für X = Cl, Br, I zu den in großer Vielfalt dargestellten trans-Halogeno(tetracarbonyl)carbin-Komplexen desTyps 
  Reference    Z. Naturforsch. 34b, 1183—1185 (1979); eingegangen am 21. Mai 1979 
  Published    1979 
  Keywords    Tetracarbonyl(organylcarbyne)tetrafluoroborato Complexes, Chromium, Tungsten, Nucleophdic Substitution 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1183.pdf 
 Identifier    ZNB-1979-34b-1183 
 Volume    34 
8Author    Joachim Von Seyerl, Gottfried Huttner, Karl KrügerRequires cookie*
 Title    Acetylaceton als Dien-Diolat-Ligand in 6-Methyl-4-methylen-2-phenyl-4H-1.3.2-dioxa-arsorin- Übergangsmetallkomplexen Acetylacetone as a Diene Diol Ligand in 6-Methyl-4-methylen-2-phenyl-4H-l,3,2-dioxa-arsorine Transition Metal Complexes  
 Abstract    of dichlorophenylarsane complexes with acetylacetone gives 1,3,2-dioxa arsorine systems, in which both chlorine functions are substituted by the oxygen atoms of one acetylacetone moiety bonded in its diene diol form. Properties and spectra of (C0)5CrAsPh(C5H602) and 7?5.c5H5(C0)2MnAsPh(C5H602) are described; the structure of the (CO)öCr complex was established by an X-ray analysis. 
  Reference    Z. Naturforsch. 35b, 1552—1554 (1980); eingegangen am 20. August 1980 
  Published    1980 
  Keywords    Arsorine Systems, Chromium, Manganese, X-ray Reaction 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1552.pdf 
 Identifier    ZNB-1980-35b-1552 
 Volume    35 
9Author    Anke Brauel, Dieter RehderRequires cookie*
 Title    Ein neuer Weg zur Darstellung der Nitrosylkomplexe CpM(CO) 2 NO (M = Cr/Mo/(W)) durch NO/CO-Austausch zwischen [Co(NO) 2 Hal] 2 und Carbonyl-cyclopentadienylkomplexen* A Novel Route to the Nitrosyl Complexes CpM(CO) 2 NO (M = Cr/Mo/(W)) by NO/CO Exchange between [Co(NO) 2 Hal] 2 and Carbonyl-cyclopentadienyl Complexes  
 Abstract    The title compounds have been prepared by NO transfer from [Co(NO)iHal] 2 (Hal = Cl, Br, I) to [CpM(CO) 3 ] 2 , CpM(H)(CO) 3 and [CpM(CO) 3 ]" (M = Cr, Mo, W; Cp = ?7 5 -C 5 H 5). In the case of the neutral complexes, the reactions need initiation and support by light; the anionic complexes are nitrosylated in a dark reaction. The highest yields (60%) are obtained from the reactions between [Co(NO) 2 Br] 2 and [CpM(CO) 3 ] 2 (M = Cr, Mo). 
  Reference    Z. Naturforsch. 42b, 605—609 (1987); eingegangen am 26. November 1986/7. Januar 1987 
  Published    1987 
  Keywords    Nitrosyltransfer, Carbonyl-Nitrosyl Complexes, Chromium, Molybdenum, Tungsten 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0605.pdf 
 Identifier    ZNB-1987-42b-0605 
 Volume    42 
10Author    Dieter Sellmann+, Bernd Seubert, W. Olfgang Kern, Falk Knoch, M. Atthias, MollRequires cookie*
 Title    Übergangsmetallkomplexe mit Schwefelliganden, LXIX* and X-Ray Structure Analyses  
 Abstract    Chrom-und Wolfram-Nitrosyl-Komplexe mit schwefeldominierten Koordinationssphären: IC r(N O)XS4')]v (x = 1, y = 2; x = 2, y = 1), (NR4)2[W (NO)2(S 2)2] (R = M e, /i-Bu), [W(L)(NO)('S4)] (L = NO , N P M e3, NPEt3) und [//-0 { W (N 0)(S4)} 2] ('S2'2" = l,2-Benzoldithiolat(2-); 'S4'2-= l,2-Bis(2-mercaptophenylthio)ethan(2-)); Synthesen, Eigenschaften und Röntgenstrukturanalysen Transition M etal Complexes with Sulfur Ligands, LXIX* Chromium and Tungsten Nitrosyl Complexes with Sulfur Dom inated C oordination Spheres: [C r(N O)/S 4')]v(* = \ , y = 2 \x = 2 , y = 1), (N R 4)2[W(NO)2('S2')2] (R = Me, «-Bu), [W(L)(NO)('S4')] (L = NO, N PM e3, N P E t3) and [//-0{W (N 0)('s7)}2] ('S2'2-= 1.2-B enzenedithiolate(2-);'S4'2-= 1.2-Bis(2-mercaptophenylthio)ethane(2-)); Syntheses, Properties In order to study the properties o f sulfur coordinated metal centres, the chromium and tung­ sten complexes [Cr(NO)(//-'S4% (4), (N R 4),[W (N O)2('S 0 2] (1) (R = Me (la), «-Bu (lb)), [W (NO)2('S4')] (2), [^ -0 {W (N 0)('S 4')}2] (3) and [W (N PR 3)(N O)('S4')] (5) (R = Me (5a), Et (5b)) were synthesized ('S2'2 = 1,2-benzenedithiolate(2—) ; 'S4'2 = 1,2-bis(2-mercaptophenyl-th io)ethane(2-)). la and lb result from the reductive nitrosylation o f Li2[W('S2')3] which was prepared by reduction o f [W('S2')3] with rc-BuLi. la was also obtained from [W (NO)2(Cl)2]", 'S2'2-and N M e4+. Alkylation o f la or lb by 1.2-dibromoethane yields 2, whose X-ray structure 
  Reference    Z. Naturforsch. 46b, 1435—5 (1991); eingegangen am 8. A pril/ 8. Juli 1991 
  Published    1991 
  Keywords    Chromium, Tungsten, Nitrosyl Complexes, Sulfur Ligands, X-Ray 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1435.pdf 
 Identifier    ZNB-1991-46b-1435 
 Volume    46 
11Author    M.A S Goher3, M.A M Abu-Youssefb+, F. A. Mautner, H. P. FritzerbRequires cookie*
 Title    Crystal Structure Investigation of Two Polymeric Chromium(III) Azide Complexes; KCr(pyridine)4(N3)4 and RbCr(pyridine)3(N3)4. A Structure Containing /i( 1,3) and //(1,1,3) Bridging Azido Ligands between Chromium and Rubidium Centered Polyhedra  
 Abstract    The structures of two polymeric complexes of chrom ium (III) azide with pyridine, KCr(py)4(N 3)4 (1), and RbCr(py)3(N 3)4 (2), were determined by X-ray crystallography. Crystal data: 1, C20H 20N 16CrK, monoclinic, space group C2/c, a = 1611.2(5), b = 1050.6(3), c = 1609.0(5) pm, ß -91.69(3)°, Z = 4 and Rw = 0.037 for 923 diffractometer data; 2, C l5H 15N 15CrRb, monoclinic, space group P 2 Jn, a = 1311.9(3), b = 1139.0(4), c = 1523.3(4) pm, ß = 109.39(2)°, Z = 4 and Rw = 0.046 for 2336 data. The crystal structure of 1 contains six-coordinated chromium and potassium cations with two pyridine ligands and four y«(l,3) bridging azido groups forming a three-dimensional net­ work structure. The chromium atoms are trans-coordinated by the pyridine ligands, whereas the potassium cations are m -coordinated. The polymeric complex 2 features di-//(l,l,3) azido bridged C rR bN 2 rings, distorted octahedral chromium(III) coordination geometry, seven-coordinated rubidium, and di-//(l,3) azido bridges which link the binuclear RbCr(pyridine)3(N 3)2 moieties into infinite chains parallel to the b axis. 
  Reference    Z. Naturforsch. 47b, 1754—1758 (1992); received June 22 1992 
  Published    1992 
  Keywords    Azide, Chromium, Crystal Structure, Pyridine Complexes, Potassium, Rubidium 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-1754.pdf 
 Identifier    ZNB-1992-47b-1754 
 Volume    47 
12Author    Saim Özkar, Zahide ÖzerRequires cookie*
 Title    3C NMR Spectroscopic Study of Pentacarbonylacetonitrilemetal(O) Complexes of the Group 6 B Elements  
 Abstract    The com plexes M (CO)5(C H 3C N) (M: Cr, M o, W) were obtained from the substitution o f TH F in M (C O)5(TH F) which has been generated by photolysis o f M(CO)6 in T H F and characterized by using IR , 'H N M R and l3C N M R spectrosco­ pies. The acetonitrile ligand is found to be N -bonded to the M (CO)5-moiety with a local C4v-symmetry. The effect o f the acetonitrile ligand on the metal-carbonyl bonding was discussed in terms o f l3C N M R chemical shifts. 
  Reference    Z. Naturforsch. 48b, 1431 (1993); received M ay 17 1993 
  Published    1993 
  Keywords    Chromium, M olybdenum, Tungsten, Carbonyl, Acetonitrile 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1431_n.pdf 
 Identifier    ZNB-1993-48b-1431_n 
 Volume    48 
13Author    S. Möhr, Hk Müller-BuschbaumRequires cookie*
 Title    Ein gemischtvalentes Oxometallat mit Cr3+ anstelle von Ti3+: Ba2Ti4+Cr20 13  
 Abstract    Single crystals of Ba2Ti4+C r20 13 w ere p rep a red by C 0 2-L A S E R h igh te m p era tu re r ea ctio n s and in v estig a te d by X -ra y w o rk . T h e c o m p o u n d c ry sta llize s w ith m o n o c li­ nic sym m etry, a = 15.0 1 8 5 , b = 3 .9 4 1 9 , c -9 .0 7 6 4 Ä , ß = 9 8 .1 3 7 °, Z = 2. B a 2T i4Cr20 13 is iso ty p ic to N a 2T i60 13. T h e crystal stru ctu re is d isc u sse d w ith r e sp e ct to o rd ered or d iso rd ered d istrib u tio n s o f T i4+ and C r3+ u sin g c a lc u la tio n s o f C o u lo m b term s o f la ttice energy. It is sh o w n , th at th e sta b ility o f th is stru ctu re ty p e w ill b e d e c r e ­ ased by rep la ce m en t o f N a + by io n s w ith h ig h er o x id a tio n sta tes. 
  Reference    Z. Naturforsch. 49b, 911 (1994); eingegangen am 17. Februar 1994 
  Published    1994 
  Keywords    Barium, Titanium, Chromium, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0911.pdf 
 Identifier    ZNB-1994-49b-0911 
 Volume    49 
14Author    İzzetA. Mour, Saim Ozkar, CorneliusG. KreiterRequires cookie*
 Title    Synthesis and Spectroscopic Studies of Pentacarbonylfumaronitrile-chromium(O), -molybdenum(O), and -tungsten(O)  
 Abstract    Photolysis of hexacarbonyl-chromium(O), -molybdenum(O), and -tungsten(O) in presence of fumaronitrile yields at room tem perature pentacarbonyl-fumaronitrile-chromium(O) (1), -molybdenum(O) (2), and -tungsten(O) (3). The complexes were purified by crystallization and characterized by IR and 13C-NM R spectroscopy. The fumaronitrile ligand is bonded to the M (CO)5 moiety by one nitrile nitrogen atom rather than by the carbon-carbon double bond. In toluene 2 dissociates into fumaronitrile and pentacarbonyl-molybdenum(O), which is stabi­ lized by the solvent. Fumaronitrile and solvated pentacarbonyl-molybdenum(O) exist in solu­ tion together with 2 in an equilibrium which lies in favour of the former species. 
  Reference    Z. Naturforsch. 49b, 1059—1062 (1994); eingegangen am 13. April 1994 
  Published    1994 
  Keywords    Chromium, Molybdenum, Tungsten, Carbonyl, Fumaronitrile Complexes 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1059.pdf 
 Identifier    ZNB-1994-49b-1059 
 Volume    49 
15Author    Ating Giirkan, AhmetM. Yilmaz, Saim Önal, ÖzkarRequires cookie*
 Title    Electrochemical Study of Tricarbonyl(y;6-cyclooctatetraene)metal(0) Complexes of the Group 6 Elements  
 Abstract    Tricarbonyl(?76-cyclooctatetraene)metal(0) complexes of the group 6 elements were prepared by using the procedures described in the literature with some minor modifications and identi­ fied by IR and NMR spectroscopy. Their electrochemical behavior was studied by using cyclic voltammetry in dichloromethane solution containing 0.1 M tetrabutylammonium tetrafiuorob-orate as supporting electrolyte. Their oxidation and reduction potentials were measured and discussed in terms of the frontier energy levels in connection with the UV-Visible electronic ab­ sorption spectral data. In order to elucidate the mechanism of electrooxidation of the complexes, constant potential electrolysis was performed for one representative example, tricarbonyl(^6-cyclooctatetraene)chromium(O). The IR monitoring of the reaction showed that it is gradually converted to hexacarbonylchromium(O) upon electrolysis at constant potential. 
  Reference    Z. Naturforsch. 53b, 875—880 (1998); received March 9 1998 
  Published    1998 
  Keywords    Carbonyl, Chromium, Molybdenum, Tungsten, Cyclic Voltammetry 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0875.pdf 
 Identifier    ZNB-1998-53b-0875 
 Volume    53 
16Author    HerbertW. Roesky, Habibollah Djarrah, Mathias Noltemeyer, GeorgeM. SheldrickRequires cookie*
 Title    Über Reaktionen von Pyrrolidinium-bis(diethylphosphoryl)phosphinidin mit Chromcarbonylkomplexen Reaction of Pyrrohdinium-bis(diethylphosphoryl)phosphinidine with Chromiumcarbonyl Complexes  
 Abstract    The reaction of [H2NC4H8]P[P(0)(0C2H5)2]2 with Cr(CO)5THF and Cr(CO)4C7H8 results in the formation of the 1: 1 and 1:2 chromium pentacarbonyl complexes. The 1: 1 complex was characterized on the basis of an X-ray analysis. It crvstallizes in the space group P I with a = 1091.9(10), 6=1164.1(12), c ='l356.4(9) pm, a = 108.89(6), ß= 97.57(7), y = 116.24(6), and Z — 2. The average P-P bond length was found to be 215.8 pm. 
  Reference    Z. Naturforsch. 37b, 1580—1583 (1982); eingegangen am 9. August 1982 
  Published    1982 
  Keywords    Crystal Structure, 31 P NMR Spectra, Phosphorus-Phosphorus Bonds, Chromium 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1580.pdf 
 Identifier    ZNB-1982-37b-1580 
 Volume    37 
17Author    Jan-K Arel Buijink, M. Athias, Noltemeyer Und, FrankT. EdelmannRequires cookie*
 Title    Metall-N,N  
 Abstract    -bis(trimethylsilyl)benzamidinate: Synthese und Kristallstruktur von Bis[N,N-bis(trimethylsilyl)benzamidinato)chroni(II), [P hC (N SiM e3)2l2Cr Metal-N,N'-bis(trimethylsilyl)benzamidinates: Synthesis and Crystal Structure of Bis[N,N'-bis(trimethylsilyl)benzamidinato]chromium(II), [PhC(NSiM e3)2]2Cr The preparation o f N,N'-bis(trimethylsilyl)benzamidinates o f chromium, manganese, zinc and bismuth is described. The chromium(II) derivative [PhC(NSiM e3)2]2Cr (2) has been char­ acterized by an X-ray structure determination. Treatment o f CpTiCl3 with one equivalent o f N a[PhC (N SiM e3),] • 0.5 Et^O yields the mixed Cp/benzamidinate complex [PhC(NSiM e3)2]CpTiCl2 (9). 
  Reference    Z. Naturforsch. 46b, 1328—1332 (1991); eingegangen am 26. April 1991 
  Published    1991 
  Keywords    N, N'-Bis(trim ethylsilyl)benzam idinates, Chromium, Manganese, Zinc, Bismuth 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1328.pdf 
 Identifier    ZNB-1991-46b-1328 
 Volume    46 
18Author    Max Herberhold, Kurt Bauer, W. Olfgang, M. IliusRequires cookie*
 Title    Oligonuclear Tricarbonylchromium-and Tricarbonyltungsten Derivatives of Tris(l-cyclohepta-2,4,6-trienyl)phosphane, P(C7H7)3 , and Related Ligands  
 Abstract    A series of trinuclear carbonylmetal complexes of tri(l-cyclohepta-2,4,6-trienyl)phosphane, P(C? 1^ 7)3 (1), has been prepared by the reaction of P(SiM e3)3 with ^-tro p y liu m halfsand­ wich salts, [(7/7-C7H7)M (CO)3]BF4, (M = Cr, Mo, W). While phosphorus remains uncoor­ dinated in the chromium complex P[(?/6-C7Hv)Cr(CO)3]3 (2a), the molybdenum and tung­ sten analogues, P[(//4-C7H 7)M (CO)3][(??6-C7H7)M(CO)3]2 (M = Mo (2b), W (2c)), contain a coordinated phosphorus atom together with a //4-norcaradienyl substituent. Reaction of 2a with pentacarbonylmetal fragments, [M(CO)s], leads to trinuclear products, P[(/;2-C7H7)M-(CO)4][(> 7/6-C7H7)M(CO)3]2 (M = Cr (5a), W (5c)), in which phosphorus is coordinated next to an //'-cycloheptatrienyl substituent. Several alkyl-and arylphosphanes containing [(^6-C7H7)Cr(CO)3] substituents (X), e. g. Ph2P(X) (6a), RP(X)2 (R = Me (7a), CH2Ph (8a), Ph (9a)) and (X)2P(R')P(X)2 (R' = methylene (10a) or o-phenylene (11a)), have also been synthesized. The chromium complexes 6a -11a contain an uncoordinated phosphorus center, but in contrast to 9a, the corresponding tungsten compound PhP[(?;4-C7H7)W (CO)3][(?/6-C7H7)W(CO)3]2 (9c) has again a structure similar to 2c. The arsenic complexes, As[(?/6-C7H7)M(CO)3]3 (M = Cr (12a), W (12c)) both contain an uncoordinated arsenic center, analogous to 2a. The molecular structures of all new complexes in solution at room temperature were deduced from a consistent set of 'H, l,C and 31P NM R data, and X-ray structure determinations were carried out for 2a and 5c. 
  Reference    (Z. Naturforsch. 54b, 63—72 [1999]; received August 3 1998) 
  Published    1999 
  Keywords    Halfsandwich Compounds, Cycloheptatrienyl Complexes, Chromium, Tungsten, X-Ray Data 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0063.pdf 
 Identifier    ZNB-1999-54b-0063 
 Volume    54 
19Author    Matthias Moll, Peter Würstl, Helmut Behrens, Peter MerbachRequires cookie*
 Title    Über neue zweikernige Metallcarbonylkomplexe mit Cyclohexadienyl-cycloheptatrien-und Cyclohexadienyl-isonitril-Brücken On New Dinuclear Metal Carbonyl Complexes with Cyclohexadienyl Cycloheptatriene and Cyclohexadienyl Isonitrile Bridges  
 Abstract    The reactions of the electrophilic [C6H7Fe(CO)3] + -and [C6H7Fe(CO)2CNEt]+-cations with theextremely nucleophilic [C7H7Fe(CO)3] _ -anion lead to the formation of the dinuclear cyclohexadienyl cycloheptatriene bridged complexes (OC)3FeC6H7-C7H7Fe(CO)3 and EtNC(OC)2FeCeH7-C7H7Fe(CO)3. In a similar reaction the tricarbonyl cation [CeH7Fe(CO)3] + with [Cr(CO)5CN] _ yields the dinuclear cyclohexadienyl isonitrile bridged compound (OC)3FeC6H7-NCCr(CO)5. The mass, IR and NMR data of the new complexes are reported. 
  Reference    Z. Naturforsch. 33b, 1304—1308 (1978); eingegangen am 19. Juli 1978 
  Published    1978 
  Keywords    Cyclohexadienyl Cycloheptatriene Iron Carbonyl Complexes, Iron Isonitrile Carbonyl Complexes, Dinuclear Cyclohexadienyl Isonitrile Carbonyl Complex, Iron, Chromium 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1304.pdf 
 Identifier    ZNB-1978-33b-1304 
 Volume    33