| | 141 | Author
| Wolfgang Flossmann, Herbert Zehner, Adolf Müller | Requires cookie* | | | Title
| Radicals Produced in Single Crystals of Thymine Derivatives by UV and X-Rays  | | | | Abstract
| Single crystals o f anhydrous thym ine (T), thym ine monohydrate (T ■ H 20) , 5,6-dihydrothym ine (T H 2), 1-methylthymine (mT) and thym idine (dT) were irradiated with X-rays and UV between 77 K and 300 K. Six types o f radicals were analyzed by ESR-spectroscopy at 9.5 G H z and 35 G H z after exposure to X-rays. The anion radical occurred only in T • H 20 at 77 K, the 4-yl radical only in T H 2 at 77 K and the 1-yl radical only in T between 77 K and 300 K. The 6 -yl radical was found in T, T H 2 and mT. It was converted into the 5-yl radical irreversibly by heat or white light (A < 600 nm). The 5-yl radical appeared in all compounds at room temperature. The highest thermal stability was found for the 7-yl radical which was present at room temperature in all compounds except T H 2 . U V -irradiation (A = 320 nm) produced radicals only in three crystals (T, T H 2 , dT). In T the 5-yl radical was found after exposure at 300 K, and two other radicals, 1-yl and 7-yl, at 77 K. A lso at 77 K, the 7-yl radical was present in dT and the 5-yl radical in TH 2 and dT. | | | |
Reference
| Z. Naturforsch. 35c, 20—2 (1980); received July 23 1979 | | | |
Published
| 1980 | | | |
Keywords
| Radicals, Single Crystals, Thym ine, X-Rays, ESR | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_C/35/ZNC-1980-35c-0020.pdf | | | | Identifier
| ZNC-1980-35c-0020 | | | | Volume
| 35 | |
| 142 | Author
| Alfred Gieren, Michail Kokkinidis | Requires cookie* | | | Title
| Structure Investigations o f Agonists o f the Natural Neurotransmitter Acetylcholine II [1| X-ray Structure Analysis o f Trimethyl(4-oxopentyl)ammonium-chloride | | | | Abstract
| The crystal structure of Trimethyl(4-oxopentyl)ammonium-chloride ([(C H 3) 3 N —(CH^aCOCHjJCl-) (1) was determined by an X-ray structure analysis. 1 crystallizes in the orthorhombic space group P21 21 21 with a = 10.440 (3), b = 14.600 (9), c = 6.804 (9) A and with four formula units per unit cell. The structure was solved by a Patterson and a successive Fourier synthesis. The least squares refinement yielded an R-value o f 0.064 for 1077 observed reflections. The cation o f 1 is derived from acetylcholine by replacement o f the ester oxygen with a CH2 group. It shows a potent nicotinic activity and a significant difference in conformation as compared with acetylcholine. In the crystal structure the anions are oriented stereospecifically with respect to the tetrahedron of the quaternary ammonium group. The geometry o f two triangles formed by the quaternary nitrogen atom, the oxygen atom o f the carbonyl group, and by either o f the two anions nearest to the quaternary ammonium group is characteristic for the nicotinic activity o f 1. | | | |
Reference
| Z. Naturforsch. 37c, 282 (1982); received December 231981 | | | |
Published
| 1982 | | | |
Keywords
| X-ray, Neurotransmitter, Cation-Anion Interactions, Structure-Activity Relationships | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_C/37/ZNC-1982-37c-0282.pdf | | | | Identifier
| ZNC-1982-37c-0282 | | | | Volume
| 37 | |
| 143 | Author
| S. | Requires cookie* | | | Title
| Untersuchungen an Stickstoff-Jod-Verbindungen, XV1 Neue Addukte des StickstofFtrijodids mit tertiären N-Basen - Chinuclidiniumpentajodid (Chin H )J3-J2, ein neues Polyjodid | | | | Abstract
| tu d ies on N itrogen -Iod in e Com pounds, X V 1 N ew A d d u cts o f N itrogen Triiodide w ith T ertiary N -B ases -C hinuclidinium pentaiodide (Chin H)I 3 • I 2, a N ew P olyiodide J o c h e n J a n d e r , H a n s P r it z k o w u n d K l a u s -U w e T r o m m s d o r f f New adducts of nitrogen triiodide with several tertiary N-bases have been prepared. Their analyses, general properties, IR-spectra and structures are reported briefly. E x periments to crystallize a compound with a ratio N : I : chinuclidin = 1:4:1 resulted in the preparation of cristallized chinuclidiniumpentaiodide (chin H)l3 -l2 , the X-ray structure analysis of which is reported. | | | |
Reference
| (Z. Naturforsch. 30b, 720—723 [1975]; eingegangen am 21. April/20. Mai 1975) | | | |
Published
| 1975 | | | |
Keywords
| Nitrogentriiodide, Tertiary N-bases, Adducts, Properties, Chinuclidiniumpentaiodide, X-ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/30/ZNB-1975-30b-0720.pdf | | | | Identifier
| ZNB-1975-30b-0720 | | | | Volume
| 30 | |
| 144 | Author
| MichaelB. Hursthouse, RobertA. Shaw, Keith Wait, MichaelW., Oods, HonSum Yu | Requires cookie* | | | Title
| | | | |
Reference
| (Z. Naturforsch. 31b, 995—996 [1976]; received March 4/April 2 1976) | | | |
Published
| 1976 | | | |
Keywords
| Cyclotriphosphazadiene, if! NMR, X-ray, Crystal Structure, Double hydrogen-bonded tricycle | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/31/ZNB-1976-31b-0995_n.pdf | | | | Identifier
| ZNB-1976-31b-0995_n | | | | Volume
| 31 | |
| 146 | Author
| | Requires cookie* | | | Title
| Über Oxocuprate, XXI | | | | Abstract
| Bariumoxohalogenocuprate(II) mit Strukturbeziehungen zu BaCu02 About Oxocuprate s, X X I Barium Oxohalocuprates(II) with Structure Relationships to B aC u02 R. K ip k a und H k. M ü l l e r -B u s c h b a u m In stitu t für A norganische Chemie der C hristian-A lbrechts-U niversität K iel A ttem p ts to prepare BaCuO-2 single crystals w ith a flux of BaCl2 and BaBi'2 respectively lead to new oxo h a lo cu p ra tes(II): B a44Cu4s0 8 7 Cl4 (A) and B assC ussO nsB ^ (B). Single crystals were in v estig a ted b y X -ra y m ethods (cubic unit cell: (A) a = 1827 pm , (B) a = 1830.3 pm , space group 0 ® -lm 3 m). The com plicated crystal structures o f both com pounds are discussed. There are very in terestin g relationships to BaCu0 2 . | | | |
Reference
| (Z. Naturforsch. 32b, 124—126 [1977]; eingegangen am 23. November 1976) | | | |
Published
| 1977 | | | |
Keywords
| B arium, Copper, O xygen, X -ray, Crystal Structure | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/32/ZNB-1977-32b-0124.pdf | | | | Identifier
| ZNB-1977-32b-0124 | | | | Volume
| 32 | |
| 148 | Author
| Markus Wieber, Christian Burschka, Ulrich Baudis | Requires cookie* | | | Title
| Darstellung und Molekülstruktur von 2-Methylthio-l,3,2-benzodithiastibol Preparation and X-ray Structure of 2-Methylthio-l,3,2-benzodithiastibole | | | | Abstract
| Starting with SbCl3 and 1,2-benzenedithiol, one can easily obtain heterocyclic 2-chloro-1,3,2-benzodithiastibole [1], which, without iso-lation, can be treated with a solution of sodium methanethiolate to yield 2-methylthio-1,3,2-benzodithiastibole. Yellow crystals were obtain-ed by recrystallization from acetonitrile. The compound was found to be monomeric in ben-zene solution. The crystal structure was solved by means of X-ray diffraction methods and could be refined to an .R-value of 0.03 with 870 independent reflections observed. The monoclinic unit cell contains 4 formula units, the space group is P2i/c. The structure can be compared with that of 2-methoxi-l,3,2-benzodioxastibole, a prelimi-nary report of which has been given [2]. The compounds are, however, not isomorphous. Interactions between neighbouring molecules in the thiastibole seem to be significantly weaker than in the corresponding oxygen compound. Verbindungen des Typs R-M<^j^>R', M = P, As, | | | |
Reference
| Z. Naturforsch. 33b, 1051—1052 (1978); eingegangen am 2. Juni 1978 | | | |
Published
| 1978 | | | |
Keywords
| 2-Methylthio -1, 3, 2 -benzodithiastibole, Preparation, X-ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/33/ZNB-1978-33b-1051_n.pdf | | | | Identifier
| ZNB-1978-33b-1051_n | | | | Volume
| 33 | |
| 149 | Author
| Axel Thiele, Joachim Fuchs | Requires cookie* | | | Title
| Struktur und Schwingungsspektren von Monomolybdaten und Monowolframaten organischer Kationen Structure and Vibrational Spectra of Monomolybdates and Monotungstates with Organic Cations | | | | Abstract
| The crystal structures of dicyclohexylammonium-monomolybdate dihydrate [(C6Hh)2NH2]2MO04 • 2 H2O, (I), cyclohexylammonium-monomolybdate, (C6HHNH3)2MO04, (II) and terf-butylammonium-monotungstate, (C4HgNH3)2W04, (III), were elucidated. In I the anion has nearly tetrahedral structure, in II one Mo-0 distance is significantly shorter than the other three, and in III all four W-0 distances are different. In spite of the variety of structures the following basic principles are recognizable: 1) Each hydrogen atom of the cationic amino groups as well as of the water of crystallization forms hydrogen bridges. 2) Never are oxygen atoms of the same M0O4 connected by these bridges, but always oxygen atoms of neighbouring M0O4 units. 3) From an oxygen atom emanate either two or no hydrogen bridge. For the investigated molybdates (tungstates) there are in all instances isomorphous tungstates (molybdates). The number and position of the vibrational bands is in good agreement with the observed anion symmetry Td, C3V and Ci, respectively. | | | |
Reference
| Z. Naturforsch. 34b, 145—154 (1979); eingegangen am 23. Oktober 1978 | | | |
Published
| 1979 | | | |
Keywords
| Monomolybdates, Monotungstates, Organic Cations, Properties, X-ray, Vibrational Spectra | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/34/ZNB-1979-34b-0145.pdf | | | | Identifier
| ZNB-1979-34b-0145 | | | | Volume
| 34 | |
| 150 | Author
| W. Stoeger, A. Rabenau | Requires cookie* | | | Title
| Darstellung, Eigenschaften und Kristallstruktur von TlgAu^j 0 Preparation, Properties, and Crystal Structure of TI6AU2I10 | | | | Abstract
| TI6AU2I10 forms black crystals with a golden luster. In a closed system the temperature of decomposition is 276 °C. In vacuum or under inert gas TlßA^Iio decomposes above 65 °C forming 1 mol I2. Above 180 °C a second mol I2 is formed giving Til and gold. The space group is P 62c with the lattice constants a = 10.569 and c = 13.431 A and Z = 2. TI6AU2I10 is built up by a framework of Tlßlß with channels parallel to the c-axis. These channels contain Au + mainly with a trigonal planar coordination or linear IJj-polyiodide ions and I -ions, resp. | | | |
Reference
| Z. Naturforsch. 34b, 685—692 (1979); eingegangen am 24. Januar 1979 | | | |
Published
| 1979 | | | |
Keywords
| X-ray, Structure Determination, Polyhalides, T1 Halides, Au Halides | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/34/ZNB-1979-34b-0685.pdf | | | | Identifier
| ZNB-1979-34b-0685 | | | | Volume
| 34 | |
| 151 | Author
| Alfred Schmidpeter, Heinz Eiletz, Joachim Von Seyerl, Gottfried Huttner, @bulletH N Jr, Ph 2%, ^. Pph, N. Ph, P. ^pph, Ch, N. N. | Requires cookie* | | | Title
| Struktur eines Spirobi(cyclophosphazens) [1] Structure of a Spirobi(cyclophosphazene) [1] Ph2p" *PPh2 N N0 N N I II Ph2P^ PPh2 Ph,P^ x PPh, 11 | 2 N^ ^NH N^N | | | | Abstract
| Proton addition to the spirobi(cyclotriphosphazene) anion 1 gives the neutral species 2. An X-ray structure determination shows the proton to be located at a nitrogen atom next to the spirocenter. The structural consequences of this protonation can be demonstrated by comparisons of intramolecular bond distances and angles and can be understood in terms of structure-determining repulsive N/N interactions in the central PN4 unit. Die alternierende Verknüpfung von tetrakoordi-niertem Phosphoniumphosphor und zweifach ko-ordiniertem Amidstickstoff _p® -N-führt mit m = n—1 zu kationischen offenkettigen, mit m = n zu neutralen monocyclischen und mit m = n -f 1 zu anionischen bicyclischen Phosphage-nen [2]. Die beiden erstgenannten Fälle sind mit n^ 2 bzw. n ^ 3 zahlreich verwirklicht, für den dritten Fall ist das Spirophosphazen-Anion 1 mit n = 5 das bislang einzige Beispiel [2], Protonierung bzw. Methylierung überführen 1 in die Neutral-verbindungen 2 und 3. Für 3 zeigt das 31 P-NMR-Spektrum, daß die Methylgruppe an einen dem Spirozentrum benachbarten Stickstoff gebunden ist. Dagegen läßt sich die Stellung des Protons in 2 wegen seiner Beweglichkeit in Lösung nicht in glei-cher Weise bestimmen [3]. Die angegebene Stellung ist jedoch aufgrund einer Abschätzung der Basizi-tätsverteilung und in Analogie zu 3 wahrscheinlich [2], Sie wird jetzt durch die Strukturbestimmung bestätigt und anhand der Strukturdiskussion auch plausibel. Cyclotriphosphazenringe [4] stellen ziemlich regel-mäßige Sechsecke dar. Sie weichen allgemein nur geringfügig von der Planarität ab, und die Summe Ph,P^ ^pph 2 3 der Innenwinkel beträgt fast oder genau 720°. Die Winkel am Stickstoff sind dabei etwas größer, die am Phosphor etwas kleiner als 120°. So wurden bei dem für einen Vergleich mit 2 am besten geeigneten (Ph2PN)3 122,1 bzw. 117,8° (Summe 719,7°) gefun-den. Der große Innenwinkel bedeutet eine erhebliche Verzerrung der tetraedrischen Phosphorkoordina-tion. Ihm muß ein entsprechend verengter Winkel zwischen den exocyclischen Substituenten gegen-übertreten. Er liegt allgemein bei 100°, bei (Ph2PN)3 beträgt er 103,8°. In 2 stehen nun am Spirozentrum einander zwei endocyclische NPN-Winkel gegen-über, und es stellt sich die Frage nach den struk-turellen Konsequenzen dieser Situation. Strukturbestimmung Die zur Strukturbestimmung verwendeten Kri-stalle von 2 wurden aus Acetonitril gewonnen und enthalten je Molekül 2 ein Lösungsmittelmolekül. Zellkonstanten und Intensitäten wurden auf einem P3-Diffraktometer bestimmt (A-MoKa = 71,069 pm, 912 A. Schmidpeter et al. • Struktur eines Spirobi(cyclophosphazens) Graphit-Monochromator, T = 200 K, co-scan, Aco = | | | |
Reference
| Z. Naturforsch. 34b, 911—914 (1979); eingegangen am 2. März 1979 | | | |
Published
| 1979 | | | |
Keywords
| Spirocyclic Phosphazene, Basicity Distribution, Coulombic Repulsion of Adjacent N, X-ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/34/ZNB-1979-34b-0911.pdf | | | | Identifier
| ZNB-1979-34b-0911 | | | | Volume
| 34 | |
| 152 | Author
| Ekkehard Lindner, Sadek Trad, Sigurd Hoehne, Hans-Henning Oetjen | Requires cookie* | | | Title
| Präparative, spektroskopische und kristallographische Untersuchungen an Phosphinato-Komplexen des Rheniums mit verschiedenen einzähnigen Liganden Preparative, Spectroscopic and Crystallographic Investigations on Phosphinato Complexes of Rhenium with Various Unidentate Ligands | | | | Abstract
| The stable phosphinato complexes [^-R2P02Re(C0)3L]" (1, 2b-f) [L = THF (a), py (b), NH3 (c), P(C6H5)3 (d), AS(C6H5)3 (e), P(C6Hn)3 (f), 0(C2H5)2 (g)] are obtained by addition of the ligands L to the compounds 0-R2P02Re(C0)3]M (1, 2) [R = CH3 (1), C6H5 (2)] at 20-40 °C (1, 2c: —35 °C). 1, 2b, d, e are also formed when THF in 1, 2a is substituted by the ligands b, d, and e. The unstable ether adducts 1, 2g which result photochemically from Re2(CO)io and the acids R2P02H, are transformed to 1, 2 by elimination of ether. At 20 °C 1, 2 a react with liquid ammonia to give the ionic complexes [(0C)3Re(NH3)3][02PR2] (1, 2h). On the basis of their mass and vibrational spectra, and a crystallographic in-vestigation, the methyl [la-f] and phenyl compounds [2 a-f] are dimeric and oligomeric, respectively. The rhenium atoms are bridged via R2P02~ ligands (phosphinato-0,0'). la crystallizes monoclinic in the space group C2/m with Z = 2. Stabile, monomere Chelatkomplexe des Mangans und Rheniums mit zweizähnigen Carboxylat-oder Phosphinat-Liganden des Typs RCE2M(CO)3L bzw. | | | |
Reference
| Z. Naturforsch. 34b, 1203—1212 (1979); eingegangen am 28. Mai 1979 | | | |
Published
| 1979 | | | |
Keywords
| Phosphinato Complexes, Rhenium(I), MS, IR, Raman, X-Ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/34/ZNB-1979-34b-1203.pdf | | | | Identifier
| ZNB-1979-34b-1203 | | | | Volume
| 34 | |
| 153 | Author
| Franz Lux, OskarF. Beck, Heinz Krauß, David Brown, TzeC. Tso | Requires cookie* | | | Title
| Spektralreines Bis(phthalocyaninato)protactinium(rV) Spectroscopically Pure Bis(phthalocyaninato)protactinium(IV) | | | | Abstract
| Spectroscopically pure PaPc2 has been prepared by reaction between Pal4 • 4 CH3CN and o-phthalic acid dinitrile in 1-chloronaphthalene followed by sublimation at 5 • 10~ 3 Pa in a temperature profile with three clearly defined zones (520 °C/350 °C/room temperature). This procedure gives a product almost completely free of H2Pc impurity which is known to have been present in previously reported complexes of the type AnPc2. Thus, the trace of H2Pc in the substance could only be detected by derivative spectroscopy. X-ray powder diffraction shows the compound to be isostructural with ThPc2 and UPc2. The ligand spectrum is typical of AnPc2 complexes, f-f Bands observed in a solid state spectrum provide additional proof that the compound is Pa IV Pc2. | | | |
Reference
| Z. Naturforsch. 35b, 564—567 (1980); eingegangen am 21. Januar 1980 | | | |
Published
| 1980 | | | |
Keywords
| Protactinium(IV) Complexes, Phthalocyaninato Complexes, Ligand Spectra, Structure, X-ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/35/ZNB-1980-35b-0564.pdf | | | | Identifier
| ZNB-1980-35b-0564 | | | | Volume
| 35 | |
| 154 | Author
| HerbertW. Roesky, SushilK. Mehrotra, Christoph Platte, Djammschid Amirzadeh-Asl, Bernhard Roth | Requires cookie* | | | Title
| und die Röntgenstrukturanalyse eines phosphorhaltigen achtgliedrigen SN-Ringes Synthesis of Four-and Eight-Membered Heterocycles Containing Sulfur, Nitrogen and Phosphorus and the X-ray Structure of a Phosphorus-Containing Eight-Membered SN-Ring | | | | Abstract
| Eight-membered rings of the composition [S02(NR)2PR']2 3a-d with R = CH3, C2H5, and R' = CH3, CßHs, were prepared from substituted sulfamides and dichlorophosphanes in the presence of a tertiary amine. These molecules were characterized on the basis of X H and 31 P NMR investigations and of mass spectra. 3 a reacts with phosphorus penta-chloride to yield the spirocyclic derivative 4 with the phosphorus atom in the center of two four-membered rings. Methyliodide reacts with 3 a and 3 b under opening of the eight-membered ring and formation of phosphonium salts. The structure of 3 b is discussed in detail. 3b crystallizes in the orthorhombic space group Pna2i with a = 12.60(0), b = 13.27(1), c — 12.62(4) A. | | | |
Reference
| Z. Naturforsch. 35b, 1130—1136 (1980); eingegangen am 9. Mai 1980 | | | |
Published
| 1980 | | | |
Keywords
| Cyclic Sulfonyl Derivatives, Phosphonium Salts, Spiro Compounds, X-ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/35/ZNB-1980-35b-1130.pdf | | | | Identifier
| ZNB-1980-35b-1130 | | | | Volume
| 35 | |
| 156 | Author
| Dierk Knittel, Gabriela Weber | Requires cookie* | | | Title
| | | | | Abstract
| The two stereoisomeric a-azidochalkones (1,3-diaryl-2-azidopropenones) are selectively obtain-able, depending on the temperature, by conden-sation of aldehydes with a-azidocarbonyl compounds. For the higher melting point compound the trans configuration is proved by single crystal X-ray analysis of its triphenyl-phosphazeno derivative. Analogous isomers may now be characterised from their X H NMR parameters. | | | |
Reference
| Z. Naturforsch. 35b, 1326—1327 (1980); received May 21 1980 | | | |
Published
| 1980 | | | |
Keywords
| a -Azidochalkones, S tereosel ecti vity, *H NMR Spectra, X-ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/35/ZNB-1980-35b-1326_n.pdf | | | | Identifier
| ZNB-1980-35b-1326_n | | | | Volume
| 35 | |
| 157 | Author
| R. Hilgenfeld, W. Saenger | Requires cookie* | | | Title
| Stabilization of a Host-Guest Type Complex by Bifurcated Hydrogen Bonds : 18-crown-6 * (2,4-Dinitrophenylhydrazine)2 a | | | | Abstract
| The X-ray structure of the 1:2 host-guest complex between 1,4,7,10,13,16-hexaoxa-cyclooctadecane (18-crown-6) and 2,4-dinitrophenylhydrazine is reported. Crystallo-graphy data are: space group P2i/c, a = 8.557(2), b = 16.745(6), c = 12.387(4) Ä, ß = 117.08(13)°, Z = 2, Dm = 1.37 g • cm" 3 , Dc = 1.387 g • cm-3 , m.p. 414 K (decomp.). The present B is 0.11 for 1733 diffractometer data. In the complex, the two 2,4-dinitrophenylhydrazine molecules are located "above" and "below" the plane of the hexaether and related by an inversion centre. They interact with the macrocyclic host via N-H---0 hydrogen bonds, two of which are bifurcated. All the ether oxygens of the crown serve as hydrogen bond acceptors. | | | |
Reference
| Z. Naturforsch. 36b, 242—247 (1981); received October 28 1980 | | | |
Published
| 1981 | | | |
Keywords
| Crown Ether, Dinitrophenylhydrazine Complex, Bifurcated Hydrogen Bonds, X-ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/36/ZNB-1981-36b-0242.pdf | | | | Identifier
| ZNB-1981-36b-0242 | | | | Volume
| 36 | |
| 159 | Author
| ErnstOtto Fischer, Willi Kleine, Werner Schambeck, Ulrich Schubert | Requires cookie* | | | Title
| Übergangsmetall-Garben-Komplexe, CXXI [1] Fluorcarbenkomplexe des Mangans Transition Metal Car bene Complexes, CXXI [1] Fluorocarbene Complexes of Manganese | | | | Abstract
| The reaction between CH3CsH4Mn(C0)3 and LiN(C2Hs)2 and subsequent alkylation with [(C 2 H 5)30]BF4 affords CH 3 C5H4(CO)2MnC(OC2H5)N(C2H5)2. This carbene complex reacts with borontrihalides BX 3 (X = F, Cl) to yield [CH 3 C5H4(C0)2MnCN(C2H 5)2]BX 4 . Ad-dition of [(C 4 H 9) 4 N]F to this cationic carbyne complex results in the formation of CH3C5H4(CO)2MnC(F)N(C2H5) 2 . In the same way C 5 H5(C0)2MnC(F)C 6 H5 is prepared from [CsH^CO^MnCCeHslSbClß. Fluoride addition can be reversed by reaction of the latter carbene complex with BF3 to give [CsH5(CO)2MnCC6H5]BF4. In the X-ray structure of C5H5(C0)2MnC(F)C6H5 unusual bonding parameters are found, which are consistent with the easy cleavage of the C(carbene)-F bond. | | | |
Reference
| Z. Naturforsch. 36b, 1575—1579 (1981); eingegangen am 21. Juli 1981 | | | |
Published
| 1981 | | | |
Keywords
| Cationic Carbyne Complexes, Fluorcarbene Complexes, Fluoride Abstraction, X-ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/36/ZNB-1981-36b-1575.pdf | | | | Identifier
| ZNB-1981-36b-1575 | | | | Volume
| 36 | |
| 160 | Author
| Beate Meyer, Hartmut Wunderlich | Requires cookie* | | | Title
| Kristallstrukturen von zwei Modifikationen des Mo(IV)-Komplexsalzes [(Et2PS2)3Mo3S(S2)3] (Et2PS2)- Crystal Structures of Two Modifications of the Mo(IV) Complex Salt [(Et2PS2)3M03S(S2)3] + (Et2PS2) | | | | Abstract
| Tris(diethyldithiophosphinato)-tris-/<-disulfido-^3-thiotriangulo-trimolybd©num(IV)-di-ethyldithiophosphinate, [(et2PS2)3Mo3S(S2)3] + (et2PS2) _ , crystallizes in two orthorhombic modifications with crystallographic parameters of A: a = 20.651(3), 6=10.152(2), c = 19.019(2) A, Pca2x, Z = 4 and B: a = 20.128(2), 6= 15.655(2), c = 12.608(1) A, Puma, Z = 4. Both crystal structures were determined from 2886 (A) and 3414 (B) X-ray data with R factors of 0.058 and 0.045, respectively. The Mo atoms form a trinuclear Mo3S(S2)3 cluster with local symmetry close to C3V in both modifications which differ in the packing of anions and cations and in the conformation of the ethyl groups. The av. distance Mo-Mo is 2.737 A, the coordination number of the Mo atoms is 7 within the cluster and 9 on inclusion of the S atoms of the dithiophosphinato group. | | | |
Reference
| Z. Naturforsch. 37b, 1437—1441 (1982); eingegangen am 24. Mai 1982 | | | |
Published
| 1982 | | | |
Keywords
| Trinuclear Molybdenum Cluster, Dithiophosphinato Complexes, Crystal Structure, X-ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/37/ZNB-1982-37b-1437.pdf | | | | Identifier
| ZNB-1982-37b-1437 | | | | Volume
| 37 | |
|
