| | 21 | Author
| HansM. Öhrlea, K. Arin Bluhme-Hensena, BirgitM. Iddelhauveb, DietrichM. Ootzb, H. Artm, W. Underlich15 | Requires cookie* | | | Title
| Cyclisierung von Amidoximen mit Oxybis(diphenylboran) Cyclization of Amidoximes with Oxybis(diphenylborane)  | | | |
Reference
| Z. Naturforsch. 46b, 1219—1222 (1991); eingegangen am 2. April 1991 | | | |
Published
| 1991 | | | |
Keywords
| Am idoxim es, 2, 3-D ihydro-l, 3, 5, 2-oxadiazaborol Derivatives, Crystal Structure | | | |
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| default:Reihe_B/46/ZNB-1991-46b-1219.pdf | | | | Identifier
| ZNB-1991-46b-1219 | | | | Volume
| 46 | |
| 22 | Author
| Thom As Kellersohn, Konrad Beckenkamp, HeinzDieter Lutz | Requires cookie* | | | Title
| Extrem asymmetrisch gebundene Wassermoleküle - Kristallstrukturen von Sr(OH)Cl * 4 H zO, Sr(OH)Br * 4 H 20 und Ba(O H )I * 4 H 20 Extremely Asymmetrically Bound W ater Molecules - Crystal Structures of Sr(OH)Cl * 4 H 70 , Sr(OH)Br * 4 H 20 , and Ba(OH)I -4 H 20 | | | | Abstract
| The crystal structures o f isotypic Sr(OH)Cl 4 H 20 , Sr(OH)Br ■ 4 H zO, and Ba(OH)I ■ 4 H 20 are repojted. The title compounds crystallize in a hitherto unknown structure type, space group P i, Z = 2. The final R values obtained are 0.0261, 0.069, and 0.062, respectively. The coordination o f the metal ions is monocapped square antiprismatic with 7 H2Ö, 1 OH~ and 1 halide ion. The halide ions separate metal/water/hydroxide layers. Each o f the four crystallo-graphically different water molecules serves as donor for one very strong and one very weak hydrogen bond and, hence, is extremely asymmetrically bound. Owing to this strong distor tion, the largest one known so far, the OH stretching vibrations o f the H 20 m olecules are intramolecularly decoupled as shown from vibrational spectra. The enthalpies o f dehydration obtained from differential scanning calorimetry are reported. | | | |
Reference
| Z. Naturforsch. 46b, 1279—1286 (1991); eingegangen am 22. April 1991 | | | |
Published
| 1991 | | | |
Keywords
| Strontium Hydroxide Halides, Barium Hydroxide Halides, Crystal Structure, Hydrates, Asymmetrically Bound H 20 | | | |
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| default:Reihe_B/46/ZNB-1991-46b-1279.pdf | | | | Identifier
| ZNB-1991-46b-1279 | | | | Volume
| 46 | |
| 23 | Author
| Alfred Zinn, Henning Von Arnim, Werner Massa, Michael Schäfer, Jürgen Pebler, K. Urt Dehnicke | Requires cookie* | | | Title
| [P h -C ( | | | | Abstract
| N S iM e3)2]2FeO ; ein Amidinatokomplex von Eisen(III) mit verzerrt trigonal-bipyramidaler Struktur [P h -C (N S iM e3)2]2FeCl; an Amidinato Complex o flro n (III) with a Distorted Trigonal-Bipyramidal Structure The am idinato complex [P h -C (N S iM e3)2]2FeCl has been prepared by the reaction o f FeOCl with the amidine P h -C (N S iM e3)[N(SiM e3)2] in acetonitrile/THF in the form o f dark red m ois ture sensitive single crystals. The complex was characterized by IR spectroscopy, by its 57Fe-M össbauer spectra, as well as by an X-ray structure determination. Space group P i, Z = 2, 3180 observed unique reflections, R = 0.068. Lattice dimensions at -8 0 C: a = 1210.4(2), b = 1272.7(3), c = 1316.0(3) pm; a = 67.81(3)°, ß = 76.14(3)°, y = 67.19(3)°. The com plex has a molecular structure in which the iron atom is surrounded in a distorted trigonal-bipyramidal fashion with the chlorine ligand and two nitrogen atoms o f different amidinato chelates in equatorial positions. The remaining nitrogen atom s occupy the apical positions. | | | |
Reference
| Z. Naturforsch. 46b, 1300 (1991); eingegangen am 28. Februar 1991 | | | |
Published
| 1991 | | | |
Keywords
| Am idinato Complex o f Iron, Synthesis, IR Spectra, 57Fe M össbauer Spectra, Crystal Structure | | | |
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| default:Reihe_B/46/ZNB-1991-46b-1300.pdf | | | | Identifier
| ZNB-1991-46b-1300 | | | | Volume
| 46 | |
| 24 | Author
| Georg Borgs, HelmUt Keck, Wilhelm Kuchen, Dietrich Mootz, ReneW. Iskemann, H. Artm, Ut Wunderlich, Prof Dr, Hans-Georg | Requires cookie* | | | Title
| Cubane Type M olybdenum -Halogen-Sulfur Clusterdithiophosphinates | | | | Abstract
| Diamagnetic clusters [M o3X -//-(S2)3-//3(S)(R 2PS2)3] 2 -4 (2: X = Cl; 3: X = Br; 4: X = I; 2 -4 : a: R = Et; b: R = Pr; c: R = Bu) are conveniently obtained by reaction o f | | | |
Reference
| Z. Naturforsch. 46b, 1525—1531 (1991); eingegangen am 18. April 1991 | | | |
Published
| 1991 | | | |
Keywords
| M olybdenum -Halogen-Sulfur Clusters, Cubane Type Cluster Core, Dithiophosphinato Ligands, Crystal Structure | | | |
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| default:Reihe_B/46/ZNB-1991-46b-1525.pdf | | | | Identifier
| ZNB-1991-46b-1525 | | | | Volume
| 46 | |
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