| | 1 | Author
| Bettina Eichhorn, Heinrich Nöth | Requires cookie* | | | Title
| New Diazasilaphosphetidines and their Precursors  | | | | Abstract
| A series of aminosilanes (R 'H N bSiR : have been prepared. In case of bulky substituents R' the aminolysis of Ph^SiCb stops at the (R'HN)ClSiPh2 stage. Replacement of the Cl atom is achieved with LiNHR' which allows the synthesis o f mixed bisaminosilanes (R'HN)(R"HN)SiPh2. The X-ray structures of three of these compounds have been determined. There are no intermolecular N-H -N hydrogen bonds in these compounds in the solid state. Several 1,3,2,4-diazaphosphetidines have been synthesized using bis(N-lithioamino)silanes and bis(N-lithioamino)phosphanes . Amongst these the heterocycle 18 possesses an almost planar four membered N iSiP ring system. | | | |
Reference
| Z. Naturforsch. 55b, 352—360 (2000); received January 18 2000 | | | |
Published
| 2000 | | | |
Keywords
| Bis(monoorganylamino)diorganylsilanes, 1, 3, 2, 4-Diazasilaphosphetinides | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/55/ZNB-2000-55b-0352.pdf | | | | Identifier
| ZNB-2000-55b-0352 | | | | Volume
| 55 | |
| 2 | Author
| ProfG. Dr, Mloston | Requires cookie* | | | Title
| Metallkomplexe | | | | Abstract
| mit funktionalisierten Schwefelliganden, XV [1]. Reaktionen von Platin(0)-Komplexen mit 1,2,4-Trithiolanen, 1,2,4,5-Tetrathianen, 1,2,3,5,6-Pentathiepanen sowie Thioketonen. Kristallstrukturanalyse von (Ph3P)2Pt(772-Ph2C=S) M etal Com plexes o f Functionalized Sulfur C ontaining Ligands, XV [1]. Reactions of Platinum(O) Com plexes w ith 1,2,4-Trithiolanes, 1,2,4,5-Tetrathianes, 1,2,3,5,6-Penta-thiepanes as well as Thioketones. X -R ay Structure A nalysis o f (Ph3P)2Pt(/72-Ph2C=S) W olfgang W eigand2, R alf W ünsch3, C hristian R obl3, Grzegorz M lostonb, Heinrich N öthc und M anfred Schm idt0 3,3,5,5-Tetraphenyl-1,2,4-trithiolane (1) reacts with twofold excess of (Ph3P)2Pt(?/2-C2H4) (4) to give a 1:1 mixture of the complexes (Ph3P)2Pt (SCPh2S) (6a) and (Ph3P)2Pt(?/2-Ph2C=S) (7a). Treatment of 3,3,6,6-tetraphenyl-l,2,4,5-tetrathiane (2) with a fourfold excess of 4 yields [Pt2(PPh3)4(/j-S)2] (8) and the platinum(O) compound 7a. The reaction of the 1,2,3,5,6-pentathiepane 3 with a fourfold excess of 4 affords a 1:1:1 mixture of 8, the platinum(O) complex 7b and the bis-thiolato platinum(II) complex 6b. The thioketone complexes 7a-c were formed in smooth reactions of 4 with the thioketones 5a-c. The molecular structure of (Ph3P)2Pt(?/2-Ph2C=S) (7a) has been established by single-crystal X-ray analysis. | | | |
Reference
| Z. Naturforsch. 55b, 453—458 (2000); eingegangen am 28. Februar 2000 | | | |
Published
| 2000 | | | |
Keywords
| 1, 2, 4-Trithiolanes, Thioketones, Platinum Complexes | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/55/ZNB-2000-55b-0453.pdf | | | | Identifier
| ZNB-2000-55b-0453 | | | | Volume
| 55 | |
| 3 | Author
| Florian Breitsameter, Peter Mayer, Alfred Schmidpeter | Requires cookie* | | | Title
| Die Kondensation von Ylidylchlorphosphanen mit Phosphanen und Bis(diphenylphosphanyl)methan und -amin The Condensation o f Ylidyl Chlorophosphines with Phosphines and Bis(diphenylphosphino)methane and -amine | | | | Abstract
| Ylidyl chlorophosphanes 1 and dichlorophosphanes 2 react with trimethylsilyl phosphanes to yield the ylidyl diphosphanes 3, 4,5, 7 and the 2-ylidyl triphosphanes 8. From the reaction of compounds 1 with lithium diphosphanyl amide and diphosphanyl methanide result the ylidyl diphosphonium ylides 11 and ylidyl diphosphinimines 13. The former rearrange to give the ylidyl triphosphanyl methanes 12. The chloromethyl diphosphinimine 13c enters a cyclization to give the 1,2,3,5-azatriphosphole derivative 14, the structure of which has been solved by X-ray analysis. From the reaction of ylidyl bis(chlorophosphanes) 17 and 20 with the same reagents the 1,2,4,5-tetraphosphinine derivative 18 and the 1,2,3,5,6-azatetraphosphinine derivatives 19 and 21 are obtained. | | | |
Reference
| Z. Naturforsch. 55b, 519—526 (2000); eingegangen am 21. Februar 2000 | | | |
Published
| 2000 | | | |
Keywords
| Phosphonium Ylides, Diphosphanes, 1, 2, 3, 5-Azatriphospholes | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/55/ZNB-2000-55b-0519.pdf | | | | Identifier
| ZNB-2000-55b-0519 | | | | Volume
| 55 | |
| 5 | Author
| Max Herberhold3, Yan-Xiang Chenga, Guo-Xin Jinb, Wolfgang Milius3 | Requires cookie* | | | Title
| l | | | | Abstract
| ,r-Di(terf-butyl)metallocenium Cations. The X-Ray Crystal Structures of [M(C5H4'Bu)2]PF6 (M = Fe, Co) and [ C o ^ H / B u ^ C o C ^ The hexafluorophosphate salts [Fe(C5H4'Bu)2]PF6 (1) and [C o ^H /B u ^lP F ö (2) crystal lize in isotypic structures with centrosymmetric cations which have a staggered (transoid) conformation of the exactly parallel ring ligands (conformational angle r = 180°). The | | | |
Reference
| Z. Naturforsch. 55b, 814—820 (2000); received May 26 2000 | | | |
Published
| 2000 | | | |
Keywords
| 1, 1 '-Disubstituted Ferrocenes, Ferrocenium Cations, Cobaltocenium Salts | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/55/ZNB-2000-55b-0814.pdf | | | | Identifier
| ZNB-2000-55b-0814 | | | | Volume
| 55 | |
| 6 | Author
| Jörg Fleischhauer3, Sven Gabriel3, Dieter Enders3, Anja Nühring3, Axel Wollmerb | Requires cookie* | | | Title
| CD-Spectroscopic Investigations for the Determination of the Absolute Configuration of a-Alkylated 1,4-CycIohexanedione Derivatives | | | | Abstract
| The absolute configuration of the conformationally flexible six membered ring system 2-me-thyl-and 2,6-dimethyl-l,4-cyclohexanedione monoethylene acetal was determined by compar ison of measured and calculated CD spectra. The rotational strengths were calculated by means of the CNDO/S-method assuming R at the stereogenic center. The results were compared with the predictions made by the octant rule. The enantiomerically pure material was synthesized via the corresponding SAMP-and RAMP-hydrazones. | | | |
Reference
| Z. Naturforsch. 55b, 1011—1014 (2000); received July 3 2000 | | | |
Published
| 2000 | | | |
Keywords
| 1, 4-Cyclohexanedione Derivatives, Absolute Configuration, CD Spectra | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/55/ZNB-2000-55b-1011.pdf | | | | Identifier
| ZNB-2000-55b-1011 | | | | Volume
| 55 | |
|
