| | 2 | Author
| Phosphonio-Substituted Tetrahydro-, -Diphosphinines, -Azaphosphinines, Georg Jochem, Martin Schm, HeinrichN. Öth ', Alfred Schmidpeter | Requires cookie* | | | Title
| Phosphonio-substituierte Tetrahydro-l,3-diphosphinine un(j Tetrahy dro-1,2,6-azad i phospli in i ne  | | | | Abstract
| The bis(triphenylphosphonio)propenide cation 1 provides two reactive CH sites in 1,3-position and can be condensed with the bis(dichlorophosphanyl)methylene triphenylphos-phorane 2 or the bis(dichlorophosphanyl)aniline 3 to form cationic six-membered rings: A tetrahydro-1,3-diphosphinine (4) with three phosphonio or phosphoranediyl substituents in 2,4,6-position and a tetrahydro-1,2,6-azadiphosphinine (5) carrying two such substituents in 3,5-position. The bromide of the latter was used for an X-ray structure analysis. The P111 ring members of the cations 4 and 5 can be oxidized in two steps by elemental sulfur to give the monothioxo and dithioxo derivatives 6. 7 and 8, 9. respectively. A crystal of the mixed chloride/bromide of 8 was used for another X-ray structure analysis. | | | |
Reference
| Z. Naturforsch. 51b, 1761—1767 (1996); eingegangen am 16. August 1996 | | | |
Published
| 1996 | | | |
Keywords
| Dichlorophosphanyl Ylides and Amines, Cyclocondensation, Phosphorus Heterocycles, 1, 3-Diphosphinines, 1, 2, 6-Azadiphosphinines | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-1761.pdf | | | | Identifier
| ZNB-1996-51b-1761 | | | | Volume
| 51 | |
| 3 | Author
| Michael Feist, Sergej Trojanov, Erhard Kemnitz | Requires cookie* | | | Title
| Die Kristallstrukturen von 1,4-Dimethylpiperazinium-tetrabromo- cobaltat(II) und -zinkat(II), (dmpipzH2) [Mn Br4] (M = Co, Zn) | | | | Abstract
| The Crystal Structures of 1,4-Dimethylpiperazinium Tetrabromocobaltate(II) and -Zincate(II), (dmpipzH2) [MHBr4] (M = Co, Zn) The compounds (dmpipzH2)[MnBr4] (M = Co, Zn) crystallize at room temperature from equi-molar solutions of 1,4-dimethylpiperazine and MBr2 • n H20 in 3M HBr. (dmpipzH2)[CoBr4] is isotypic with the homologous chlorometalates of Co and Zn and crystallizes in the mono clinic space group P2,/m with a = 6.424(3), b = 14.588(6), c = 7.102(6) A, ß = 90.87(6)°, Z = 2. (dmpipzH2)[ZnBr4], however, crystallizes in the monoclinic space group P2,/c with a = 7,605(5), b = 13,760(9), c = 13,286(7) Ä, ß = 93,03(6)°, Z = 4. Both structures con tain centrosymmetric cations (dmpipzH2)2+ in the chair form and slightly distorted tetrahedra [MBr4]2~ with a mirror plane in the case ofM = Co. Several distances N- • -Brin both structures are interpreted in terms of N-H- • Br hydrogen bonds which are favoured by the packing in the case of M = Zn. | | | |
Reference
| (Z. Naturforsch. 51b, 9—13 [1996]; eingegangen am 12. Juni 1995) | | | |
Published
| 1996 | | | |
Keywords
| 1, 4-Dimethylpiperazinium Tetrabromometalates(II), Cobalt, Zinc, Crystal Structure | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0009.pdf | | | | Identifier
| ZNB-1996-51b-0009 | | | | Volume
| 51 | |
| 4 | Author
| Z. Naturforsch | Requires cookie* | | | Title
| Synthese und Dimerisierungsverhalten des l,l-Bis(trimethylsilyl)-2-(2,5-diisopropylphenyl)silens | | | | Abstract
| Tris(trim ethylsilyl)silylmagnesium bromide, (Me^SiX^SiMgBr, reacts with 2.5-diisopropyl-benzaldehyde to give 2,5-diisopropylphenyl-tris(trimethylsilyl)silylmethanol (1). With sodium | | | |
Reference
| Z. Naturforsch. 51b, 370—3 (1996); eingegangen am 21. August 1995 | | | |
Published
| 1996 | | | |
Keywords
| Silenes, Silene Dimerization, 2, 3-Disilanaphthalenes Tetrahydro, 1, 2-Disilacyclobutanes | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0370.pdf | | | | Identifier
| ZNB-1996-51b-0370 | | | | Volume
| 51 | |
| 5 | Author
| JosephG. Robe, Duc Le Van, JostW. Innemöller, Bernt Krebs, M. Echtild Läge | Requires cookie* | | | Title
| Reaktive E=C(p-p)7r-Systeme, XLIII [1] Darstellung und Charakterisierung P-Phosphino-oder P-Arsino-substituierter Fluorphosphaalkene des Typs R2E-P=C(F)NEt2 (R = Me, CF3, Me2N; E = P, As) | | | | Abstract
| Reactive E=C(p-p)-7r System s XLIII [1] Synthesis and Characterization o f P -Phosphino or P-A rsino Substituted Fluoro-phosphaalkenes of the Type R 2E -P=C (F)N Et2 (R = Me, C F 3, M e7N; E = R As) The easily accessible phosphaalkene HP=C(F)NEt2 (lb) reacts with halophosphanes or -arsanes R2EX (X = Cl, I) in the presence of NEt3 to give P-phosphino-or -P-arsino sub stituted fluorophosphaalkenes of the type RiE-P=C(F)NEti (2 -6) in high yields (60 -85 %) [R2E: (CF3)2P (2), Me2N(CF3)P (3), Me2P (4), (CF3)2As (5), M e2As (6)]. The analogous re-action of ib with CF3PI2 (molar ratio 1:2) unexpectedly leads to the triphosphetene Et2N | | | |
Reference
| Z. Naturforsch. 51b, 778—784 (1996); eingegangen am 30. November 1995 | | | |
Published
| 1996 | | | |
Keywords
| Phosphaalkenes, 1, 2, 3-Triphosphetenes, NMR Spectra, Crystal Structure | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0778.pdf | | | | Identifier
| ZNB-1996-51b-0778 | | | | Volume
| 51 | |
| 6 | Author
| Z. Naturforsch | Requires cookie* | | | Title
| ,1-Organoboration of Sterically Hindered Tetra-l-alkynylsilanes and the Crystal Structure of Tetrakis[l-(3,3-dimethyl)butynyl]silane | | | | Abstract
| Tetra-l-alkynylsilanes, Si(C sC R *)4 with R 1 = 'Bu (1) and SiMe3 (2) react with triethyl-borane, E t3B. by intermolecular 1,1-ethyloboration followed by intramolecular 1.1-vinylo-boration. to give the substituted siloles 3 and 5 with two R 'C = C groups linked to silicon. The formation of 5 (R 1 = SiMe3) requires exactly one equivalent of E t3B, whereas 3 (R 1 = 'Bu) is formed after = 2 0 d in boiling toluene in the presence of a large excess of E t3B, and the remaining 'B u -C = C groups in 3 do not react with E t3B. The 1,1-organoboration of 2 using one equivalent of 9-ethyl-9-borabicyclo[3.3.1]nonane, Et-9-BBN, proceeds similar to the E t3B-reaction, to give mainly the silole derivative 6, in which the bicyclic ring system is enlarged by two carbon atoms. This product is the result of a kinetically controlled reaction. The single crystal X-ray analysis of 1 has been carried out (space group Pnm a; a = 990.0(2), b = 1668.0(3), c = 1479.0(3) pm), and its crystal structure is com pared with that of the corre sponding tin compound 1 (Sn). | | | |
Reference
| Z. Naturforsch. 51b, 1320—1324 (1996); received March 14 1996 | | | |
Published
| 1996 | | | |
Keywords
| Tetra-l-alkynylsilanes, 1, 1-Organoboration, Siloles, X-Ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-1320.pdf | | | | Identifier
| ZNB-1996-51b-1320 | | | | Volume
| 51 | |
| 7 | Author
| G. Erhard, H. Enesa, A. Nton Rieker, M. Arkus, N. Eum Ayerb, W. Olfgang Hiller | Requires cookie* | | | Title
| ,4-Addition of Lithium Organyls to /?ara-Quinols / Structure Determination of 2,6-Di-te/t-butyl-4-hydroxy-4,5-diphenyIcyclohex-2-en-l-one | | | | Abstract
| Addition of lithium organyls to sterically hindered para-quinols leads to 1,2-or 1,4-adducts. The 1,4-addition prevails, if the 4-substituents in the quinol and the organic group in the lithium organyl are large. Four 1,4-addition products (2-cyclohex-2-en-l-ones) are synthesized and their structures investigated by NMR spectroscopy. The aryl groups at C-4 and C-5 acquire equatorial positions, the alkyl group at C-6 is bisectional. These results are confirmed by X-ray analysis of 2,6-di-terr-butyl-4-hydroxy-4,5-diphenylcyclohex-2-en-1 -one, revealing a twist boat conformation of the cyclohexene ring. | | | |
Reference
| Z. Naturforsch. 51b, 381—387 (1996); received August 11 1995 | | | |
Published
| 1996 | | | |
Keywords
| Crystal Structure, Quinol, 1, 4-Addition, Lithium Organyl, Cyclohex-2-en-l-ones | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0381.pdf | | | | Identifier
| ZNB-1996-51b-0381 | | | | Volume
| 51 | |
| 8 | Author
| H. Möhrle, U. Von Der Lieck-Waldheim | Requires cookie* | | | Title
| Vinamidinium-Salze als Nucleophile Vinamidinium Salts as N ucleophiles | | | | Abstract
| 1,4-diazepinium salts could not be aminomethylated with conventional methods, but the hydrochlorides produced with methyleniminium salts the C-Mannich-compounds. The reactivity of the substrate was mainly controlled by electronic effects of the substituents. Aminomethylation of 1,5-diazapentadienium salts occurred only if the conformations caused no steric hindrance of the ß-C-atom. Methyl substituted 2,3-dihydro-1,4-diazepinium salts reacted with 1,3,5 triazine to pyrimidine anellated derivatives. | | | |
Reference
| Z. Naturforsch. 51b, 421—430 (1996); eingegangen am 4. Juli 1995 | | | |
Published
| 1996 | | | |
Keywords
| Mannich Reaction, Iminium Salts, 1, 3, 5 Triazine, Push-Pull-Systems 2, 3-Dihydro- | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0421.pdf | | | | Identifier
| ZNB-1996-51b-0421 | | | | Volume
| 51 | |
| 9 | Author
| P. | Requires cookie* | | | Title
| Phosphonio-substituierte 1,3-Diphosphanaph thaline aus der a,o-Kondensation von Phosphonium-benzyliden | | | | Abstract
| h o sp h o n io -S u b stitu te d 1 .3 -D ip h o sp h a n ap h th a le n es from th e a,o -C o n d e n sa tio n o f P h o sp h o n iu m -b en z y lid e s G eo rg Jo ch em , A lfred S chm idpeter* | | | |
Reference
| Z. Naturforsch. 51b, 773—777 (1996); eingegangen am 21. Dezember 1995 | | | |
Published
| 1996 | | | |
Keywords
| Phosphonium Ylides, Electrophilic Aromatic Substitution, 1, 3-Benzodiphosphinines, Spontaneous Chlorophosphine Dissociation, Selective Oxidation by Elemental Sulfur | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0773.pdf | | | | Identifier
| ZNB-1996-51b-0773 | | | | Volume
| 51 | |
| 10 | Author
| B. Ernd, W. Rackm Eyer, D. Örfler, W. Olfgang Milius, M. Ax, H. Erberhold | Requires cookie* | | | Title
| ,1-Organoboration of Trimethyl-l-propynyltin Using Diorganoboryl-Substituted Ferrocenes | | | | Abstract
| The reactions of various diorganoborylferrocenes, F c -B R 2 [1, R = Me (a), Et (b), 'Pr (c), 'Bu (d), Ph (f), R2B = 9-borabicyclo[3.3.1]nonyl (e)] and 1,1 '-bis(9-borabicyclo[3.3.1]nonyl)-ferrocene (2) with trimethyl-l-propynyltin (3) were studied, and the products of the 1,1-organoboration were characterized as the alkenyltin compounds 4 -6 by 'H, UB, 13C and 119Sn NMR. In the cases of l a -I d and If, there is competition between the transfer of a ferrocenyl group and the other organyl groups R from boron to carbon, whereas in the case of the 9-borabicyclo[3.3.1]nonane derivatives le and 2, the enlargement of the bicyclic system takes place selectively (compounds 4e and 6). The molecular structure of the product 6, obtained from the reaction between the l,l'-diborylated ferrocene 2 and two equivalents of 3, was determined by single crystal X-ray analysis (space group P2x!c\ monoclinic; Z = 4, a = 958.3(2), b = 1610.4(3), c = 2405.3(5) pm and ß = 90.33(3)°). | | | |
Reference
| Z. Naturforsch. 51b, 851 (1996); received October 26. 1995 | | | |
Published
| 1996 | | | |
Keywords
| Ferrocenes, Trimethyl-l-propynyltin, 1, 1-Organoboration, Alkenyltin Compounds, X-Ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-0851.pdf | | | | Identifier
| ZNB-1996-51b-0851 | | | | Volume
| 51 | |
| 11 | Author
| Z. Naturforsch | Requires cookie* | | | Title
| Elektronentransfer und Ionenpaar-Bildung | | | | Abstract
| , 47 [1] Titrationen von 1,2,4,5-Tetracyanbenzol und 7,7,8,8-Tetracyan-/;-chino-dimethan mit Natriummetall in aprotischen Lösungen E le ctro n T ran sfer an d Ion P air F o rm atio n , 47 [ 1 ] T itratio n s o f 1,2 ,4 ,5 -T etracy an o b en zen e and 7 ,7 ,8 ,8 -T etracy an o -/?-q u in o d im eth an e w ith S o d iu m M etal in A p ro tic S o lu tio n s H an s B ock*, M a rk u s K leine | | | |
Reference
| Z. Naturforsch. 51b, 1215—1221 (1996); eingegangen am 25. Januar 1996 | | | |
Published
| 1996 | | | |
Keywords
| 1, 2, 4, 5-Tetracyanobenzene, 7, 7, 8, 8-Tetracyano-/?-quinodimethane, Sodium Metal Reduction, UV/VIS Spectra | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-1215.pdf | | | | Identifier
| ZNB-1996-51b-1215 | | | | Volume
| 51 | |
| 12 | Author
| Vasily | Requires cookie* | | | Title
| Chemistry of the l,3>5-Triaza-2-phosphorin-4,6-diones, Part XII*. Synthesis and Characterization of 2-PhenyI-2-(/?-tolylthio)-l,3?5- trimethyI-l,3,5-triaza-4,6-dione-2-phosphorinonium Salts | | | | Abstract
| A . P in ch u k , Io n N e d a , C h ristian M üller, H o lg e r T h ö n n e ss e n , P e te r G. Jones, R e in h a rd S chm utzler The reaction of l,5-bis(trimethylsilyl)-l,3.5-trimethylbiuret (1) with/M olylsulfenyl chloride (2) furnished l-(/?-tolylthio)-5-trimethylsilyl-l,3,5-trimethylbiuret (3). In the reaction of 3 with phenyldichlorophosphine, 2-phenyl-2-(/?-tolylthio)-l,3,5-trimethyl-l,3,5-triaza-4,6-dione-2-phosphorinonium chloride (4) was formed. The same product was obtained from the reac tion of 2-phenyl-l,3,5-trimethyl-l,3,5-triaza-2/.3-phosphorin-4,6-dione (6) with p-tolylsulfenyl chloride (2). Compound 4 was isolated and characterized in the form of the hexachloroanti-m onate (4a). The spirophosphorane 2-phenyl-l,3,5-trimethyl-l,3,5-triaza-7,10-dioxa-8,9-perchlorobenzo-2As-phosphaspiro-[4.5]decan-4,6-dione (7) was prepared by the reaction of 4 with tetrachloroorthobenzoquinone. The new products were characterized by 'H -and 13C NMR spectroscopy, elemental analysis, 31P NMR spectroscopy in the case of 4a. 6 and 7, and mass spectrometry (4a). Single-crystal X-ray structural analyses of compounds 4a and 7 were conducted. The phosphorus atom of 4a has the expected tetrahedral geometry, with a rather short P-S bond of 204.9(2) pm. In 7 the geometry at phosphorus is almost ideal trigonal bipyramidal. Weak hydrogen bonds are formed from a C (:0) group to deuterochloroform of solvation. | | | |
Reference
| Z. Naturforsch. 51b, 1494—1500 (1996); received February 13 1996 | | | |
Published
| 1996 | | | |
Keywords
| 1, 3, 5-Trimethyl-Substituted 1, 3, 5-Triaza-4, 6-dione-2-phosphorinonium Derivatives, Intram olecular Rearrangem ent, NMR Spectra, X-Ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/51/ZNB-1996-51b-1494.pdf | | | | Identifier
| ZNB-1996-51b-1494 | | | | Volume
| 51 | |
|
