ZfN: Search Results

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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	TEI-XML for	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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	TEI-XML for	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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	TEI-XML for	default:Reihe_B/55/ZNB-2000-55b-0051.pdf
	Identifier	ZNB-2000-55b-0051
	Volume	55