| 1 | Author
| RolandE. Schmidt, Werner Massa | Requires cookie* | | Title
| Die Kristallstruktur von Tricarbonyl(2.6-di-rm-butyl-pyridin)chrom(0) bei 200 K Crystal Structure of Tricarbonyl(2,6-dwerr-butyl-pyridine)chromium(0) at 200 K  | | | Abstract
| Based on single crystal X-ray diffraction data the crystal structure of tricarbonyl(2,6-dwm-butyl-pyridine)chromium(O) has been determined at 200 K: space group P 2,/n, Z = 4, lattice constants a = 680.6(5), b — 1383.3(10), c = 1763.0(16) pm, ß = 96.53(8)°, refinement to R" — 0.048 for 1672 independent reflections with F0 > 2 a. The chromium atom is ^ ^ -b o n d ed to the essentially planar pyridine ring (Cr—C: 219—222 pm, Cr—N: 221 pm). The CO ligands show "eclipsed" orientation with respect to the 2, 4 and 6 position of the pyridine ring. Two CO groups fit into the gaps formed by two methyl groups of the tert-butyl substituents in 2 and 6 position, respectively. The results are discussed in context with related arene and A3-phosphorine com plexes. | | |
Reference
| Z. Naturforsch. 39b, 213 (1984); eingegangen am 14. September 1983 | | |
Published
| 1984 | | |
Keywords
| Pyridine Complex, Tricarbonyl Chromium Complex, Crystal Structure | | |
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| default:Reihe_B/39/ZNB-1984-39b-0213.pdf | | | Identifier
| ZNB-1984-39b-0213 | | | Volume
| 39 | |
2 | Author
| M.A S Goher3, M.A M Abu-Youssefb+, F. A. Mautner, H. P. Fritzerb | Requires 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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| default:Reihe_B/47/ZNB-1992-47b-1754.pdf | | | Identifier
| ZNB-1992-47b-1754 | | | Volume
| 47 | |
3 | Author
| M. Atthias, W. Esterhausen, Tobias Bollw, Kurt Polborn | Requires cookie* | | Title
| Synthese, Struktur und Reaktivität von Aminomethylpyridin- zinkdihalogeniden Synthesis, Structure and R eactivity o f A m inom ethylpyridine Zinc D ihalides  | | | Abstract
| Zinc dichloride reacts with aminomethylpyridine (AMP) to the corresponding 1:1 adduct 1, whereas ZnBr2 forms an ionic 1:2 complex of the type [(AMP)2ZnBr]+ Br~ 2, which loses one neutral coligand upon heating in M e-C (0)0E t to yield nearly insoluble (AM P)ZnBr2 3. The condensation reaction of these compounds with acetone yields propylideneaminomethylpyri-dine zinc dichloride (4) and dibromide (5), respectively. The reaction of Z nl2 with AMP and acetone gives propylideneaminomethylpyridine zinc dichloride (6) in quantitative yield. The structures of 3, 4, and 6 confirm the linear relationship between the Zn-N distance and the X-Zn-X angle in compounds of the type (L2)ZnX2 with L2 being a bidentate amino base, whereas short Zn-N bonds enforce small X-Zn-X angles. Compound 2 consists of separated ions in the solid state with a five coordinate zinc atom in a distorted trigonal bipyramidal coordination sphere. | | |
Reference
| (Z. Naturforsch. 55b, 51—59 [2000]; eingegangen am 9. November 1999) | | |
Published
| 2000 | | |
Keywords
| Halide, Pyridine Complexes, Zinc, X-Ray Data | | |
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| default:Reihe_B/55/ZNB-2000-55b-0051.pdf | | | Identifier
| ZNB-2000-55b-0051 | | | Volume
| 55 | |
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