| | 1 | Author
| M., S. W. | Requires cookie* | | | Title
| Efficiency of Photosubstitution of Arenetricarbonylchromium(O) Complexes  | | | | Abstract
| The quantum efficiency of the formation of (arene)Cr(CO)2(pyridine) (arene = benzene, mesitylene) is reported as a function of the irradiation wavelength of (arene)Cr(CO)3 and as a function of pyridine concentration. The quantum efficiency is independent of pyridine concentration in the range 0.008-0.17 M. The quantum efficiency is 0.72 ± 0.07 upon 313, 366, or 436 nm irradiation. The (arene)Cr(CO)3 complexes are found to quench triplet excited benzil at a diffusion controlled rate and the quenching is accompanied by reaction of the (arene)Cr(CO)3. The reaction product which presumably arises from CO release is the same as that obtained from direct irradiation of (arene)Cr(CO)3 in the presence of benzil. However, the triplet sensitized reaction occurs with a quantum efficiency of only 0.15 ± 0 .0 5 in contrast to the high substitution efficiency (0.72 ±0.07) of (arene)Cr(CO)3 upon direct irradiation. | | | |
Reference
| (Z. Naturforsch. 30b, 254—258 [1975]; received May 10 1974) | | | |
Published
| 1975 | | | |
Keywords
| Photosubstitution, Metal Carbonyl, Energy Transfer, Photodissociation | | | |
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| default:Reihe_B/30/ZNB-1975-30b-0254.pdf | | | | Identifier
| ZNB-1975-30b-0254 | | | | Volume
| 30 | |
| 2 | Author
| Wolfgang Danzer, Wolfgang Beck, Michael Keubler | Requires cookie* | | | Title
| Reaktionen von Metallcarbonylverbindungen mit Diaziridin 1 Reactions of Metal Carbonyls with Diaziridine | | | | Abstract
| Cyclic carbamoyl complexes (2) and (3) result from the reaction of metal carbonyl hydrides with 3,3-pentamethylen diaziridine (1). 1 is cleaved at the metal by reaction with substituted metal carbonyls of Mo and W formally into 'nitrene' and cyclohexanone imine, which are isolated as isocyanate and ketimine complexes, respectively. 1 forms adducts with cobalt and nickel(II) chlorides. | | | |
Reference
| (Z. Naturforsch. 31b, 1360—1366 [1976]; eingegangen am 16. Juli 1976) | | | |
Published
| 1976 | | | |
Keywords
| Ring Opening, Diaziridine, Metal Carbonyls, Carbamoyl, Ketimine Complexes | | | |
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| default:Reihe_B/31/ZNB-1976-31b-1360.pdf | | | | Identifier
| ZNB-1976-31b-1360 | | | | Volume
| 31 | |
| 3 | Author
| Manfred Fild, Wolfgang Handke, WilliamS. Sheldrick | Requires cookie* | | | Title
| Methylen Verbindungen von Nichtmetallen, III [1] Metallcarbonyl-Komplexe mit methylenverbrückten Diphosphor-Liganden Methylene Compounds of Non-Metals, III [1] Metal Carbonyl Complexes of Methylene-Bridged Diphosphorus Ligands | | | | Abstract
| Compounds of the type R2PCH2PR2 (R = Pr«0, Me2N) react with cis-LM(CO)4 (L = Bicyclo[2,2,l]hepta-2,5-dien; M = Cr, Mo, W) complexes to yield cis-substituted [R2PCH2PR2]M(CO)4 derivatives. The structure of the molybdenum compound, [(Pr i O)2PCH2P(OPr i)2]Mo(CO)4, has been determined. Diphosphorus ligands of the type R2P(S)CH2PR2 (R = F, Pr*0) are monodentate and form [R2P(S)CH2PR2]2Mo(CO)4 complexes, whereas the compound (Me2N)2P(S)CH2P(NMe2)2 acts as a bidentate ligand. | | | |
Reference
| Z. Naturforsch. 35b, 838—842 (1980); eingegangen am 20. Februar 1980 | | | |
Published
| 1980 | | | |
Keywords
| Metal Carbonyls, Diphosphorus Ligands, X-ray | | | |
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| default:Reihe_B/35/ZNB-1980-35b-0838.pdf | | | | Identifier
| ZNB-1980-35b-0838 | | | | Volume
| 35 | |
| 5 | Author
| Joseph Grobe, Heinz Zimmermann | Requires cookie* | | | Title
| Elektrochemische Synthesen, VI [1] | | | | Abstract
| Elektrochemische Substitution der YIB-Hexacarbonyle M(CO)6 (M = Cr, Mo, W) Electrochemical Syntheses, VI [1] Electrochemical Substitution of VIB-Hexacarbonyls M(CO)6 (M = Cr, Mo, W) The electrochemical substitution of group VIB hexacarbonyls by solvent molecules and/or phosphane ligands is studied in some detail and is found to be a fruitful alternative preparative route to the well-known photochemical reaction. | | | |
Reference
| Z. Naturforsch. 36b, 301—306 (1981); eingegangen am 24. Oktober 1980 | | | |
Published
| 1981 | | | |
Keywords
| Electrochemical Synthesis, Metal Carbonyls, Substitution Products, Phosphane Ligands | | | |
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| default:Reihe_B/36/ZNB-1981-36b-0301.pdf | | | | Identifier
| ZNB-1981-36b-0301 | | | | Volume
| 36 | |
| 6 | Author
| Organometallic Lewis, Philipp Rosendorfer, Shahram Mihan, Burkhard Niemer, Wolfgang Beck | Requires cookie* | | | Title
| Metallorganische Lewis-Säuren, LV [1] Darstellung und Reaktionen von Tetracarbonylmethyltetrafluoroboratoosmium, cis-( OC)4Os(FBF3)CH3 | | | | Abstract
| Acids, LV [1] Preparation and Reactions of Tetracarbonylmethyltetrafluoroboratoosm ium , cis-(O C)4Os(FBF3)CH3 The reaction of ds-M e2O s(C O)4 with H BF4 Et20 affords the complex cis-(O C)4O s(FBF3)CH3 (2). The coordinated tetrafluoroborate of 2 is easily substituted by H70 , [R e(C O)5] \ [R e(C O)4(C N)CH 3]-(from R e(C O)5CH3 and N aN (SiM e3)2), SC N ' and PPhMe2 | | | |
Reference
| Z. Naturforsch. 50b, 1759—1766 (1995); eingegangen am 3. April 1995 | | | |
Published
| 1995 | | | |
Keywords
| Osmium, Rhenium, Metal Carbonyl, Tetrafluoroborate, Methyl | | | |
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| default:Reihe_B/50/ZNB-1995-50b-1759.pdf | | | | Identifier
| ZNB-1995-50b-1759 | | | | Volume
| 50 | |
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