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1990 (280)
181Author    Gabriele Knörzer, Herm Ann Seyffer, W. Alter, SiebertRequires cookie*
 Title    Synthese von Diboraheterocyclen mit einer BC3B-Gruppierung Synthesis of Diboraheterocycles with a BC3B Unit  
  Reference    Z. Naturforsch. 45b, 1136—1138 (1990); eingegangen am 31. Januar 1990 
  Published    1990 
  Keywords    1, 3-Diborylpropanes, 1, 2-Diborolane, 1, 2, 6-Thiadiborinane, 1, 2, 6-Azadiborinane 
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 Identifier    ZNB-1990-45b-1136 
 Volume    45 
182Author    M. Arianne Bäudler, JosefH. AhnRequires cookie*
 Title    Zur Existenz eines Triphosphacyclobutenid-Ions P3CH20 Contributions to the Chemistry of Phosphorus, 204 [1] On the Existence of a Triphosphacyclobutenide Ion P3C H 2e  
 Abstract    The structure o f the reaction product o f white phosphorus and sodium in diglyme which exhibits a low field AB2 system in the 31P {'H } N M R spectrum [4] has been reexamined. A c­ cording to the results o f a complete analysis o f its proton coupled 31P N M R spectrum (ABB'XX' system), the compound is the hitherto unknown 1,2,3-triphosphacyclopentadienide 
  Reference    Z. Naturforsch. 45b, 1139—1142 (1990); eingegangen am 9. Februar 1990 
  Published    1990 
  Keywords    Triphosphacyclobutenide Ion, 1, 2, 3-Triphosphacyclopentadienide Ion, Tetraphosphacyclopentadienide Ion, Phosphorus Heterocycles 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1139.pdf 
 Identifier    ZNB-1990-45b-1139 
 Volume    45 
183Author    Arne Haaland, Andreas Hammel, Hanne Thomassen, HansV. Volden, H. Arkesh, B. Singh, PawanK. KhannaRequires cookie*
 Title    The Molecular Structures of Hexamethyldistannane, (CH 3)6Sn2, and Dimethylditellurane, (CH3)2Te2, by Gas Electron Diffraction  
 Abstract    Gas electron diffraction data o f (CH3)6Sn2 and (C H 3)2T e2 are consistent with molecular models o f D 3 and C2 symmetry and bond distances S n -S n = 277.6(3) pm and T e -T e = 268.6(3) pm, respectively. 
  Reference    Z. Naturforsch. 45b, 1143—1146 (1990); received February 2 1990 
  Published    1990 
  Keywords    Gas Electron Diffraction, Hexamethyldistannane, Dimethylditellurane 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1143.pdf 
 Identifier    ZNB-1990-45b-1143 
 Volume    45 
184Author    Kerstin Dippel, Uwe KlingebielRequires cookie*
 Title    Kontraktionsreaktionen lithiierter Cyclotetrasilazane zu Cyclotri-und Cyclodisilazanen C ontraction Reactions of Lithiated Cyclotetrasilazanes Yielding Cyclotri-and Cyclodisilazanes  
 Abstract    The lithium derivate o f the octamethylcyclotetrasilazane 1 reacts with fluorosilanes with substitution (2) or substitution and contraction to give cyclotrisilazanes (3 —6). Lithiated 6 again reacts with substitution (7, 11, 12) or substitution and isomerization to give l,3 -(S i-N -S i) substituted cyclodisilazanes (8 , 13). Starting with the dilithiated eight mem-bered ring (14) the reactions with fluorosilanes lead to the formation o f the unsymmetrically l-(S i)-3 -(S i-N -S i-N -S i)-s u b s titu te d four mem bered rings (9, 10). The isomerization o f the lithium salts depends on thermal, thermodynamic and kinetic effects. 
  Reference    Z. Naturforsch. 45b, 1147—1154 (1990); eingegangen am 26. Januar 1990 
  Published    1990 
  Keywords    Cyclotetrasilazane, Lithium Salts, Isomerization, Cyclodisilazanes, Cyclotrisilazanes 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1147.pdf 
 Identifier    ZNB-1990-45b-1147 
 Volume    45 
185Author    Ulrich Timper, Gert Heller, M. Ahm Ood, Shakibaie-M OghadamRequires cookie*
 Title    Sborgit und /?-Sborgit -eine zweite synthetische Modifikation von Na[B50 6(0 H )4] * 3 H 20 Sborgit and /?-Sborgit -a Second Synthetic M odification of Na[B50 6(0 H )4] * 3 H 20  
 Abstract    In crystallization experiments for silver borate hydrates from solutions o f borax, boric acid, and silver nitrate, a mixture o f sborgite and a second m odification -named by us "/?-sborgite" -have been found besides excess H 3B 0 3 and a microcrystalline silver borate. Both m odifica­ tions contain the same distorted pentaborate ion [B50 6(0 H)4]~. Both N a + ions in the asym­ metric unit are in special positions along the binary axis; one, N a (l), is octahedrally coordinat­ ed by four H20 molecules and two OH groups, the other one, N a(2), is tetrahedrally coordi­ nated by two H 20 molecules, two OH groups and -at longer distances -with two bridging oxygen atom s o f the pentaborate unit. The different angles -only a small rotation on the b-axis -o f the pentaborate anions between an identical matrix o f N a-cations give rise to the two different modifications. 
  Reference    Z. Naturforsch. 45b, 1155—1166 (1990); eingegangen am 7. Juni 1989/25. Januar 1990 
  Published    1990 
  Keywords    Sborgite, Polyborates, Sodium Pentaborate, M odification 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1155.pdf 
 Identifier    ZNB-1990-45b-1155 
 Volume    45 
186Author    AlfonsM. Öhlenkamp, Rainer MattesRequires cookie*
 Title    Reaktionen von Oxo-Rhenium(VII und V)-Verbindungen mit Thiobenzoylhydrazin. Kristall-und Molekülstrukturen von Re(NHNC(S)Ph)3 * DM F, Re(NH NC(S)Ph)3 * O PPh3 und [Re(NH NC(S)Ph)(NH NH C(S)Ph)2]Cl -l/3 C 2H5OH -1 /3 H 20  
 Abstract    Reactions of Oxorhenium(VII and V) Complexes with Thiobenzoylhydrazine. Crystal and Molecular Structures of R e(N H N C (S)Ph)3 • D M F, R e(N H N C (S)Ph)3 • O PPh3 and [Re(NHNC(S)Ph)(NHNHC(S)Ph)2]Cl • l/3 C 2H 5O H -1/3 H 20 D iazene Complexes o f Rhenium, Hydrazido Complexes o f Rhenium The reaction o f N a R e 0 4 with thiobenzoylhydrazine yields R e(N H N C (S)P h)3-D M F (1). With R eO C l3(PPh3), thiobenzoylhydrazine reacts to give R e(N H N C (S)P h)3 • OPPh3 (2) and in the presence o f H C fto yield [R e(N H N C (S)P h)(N H N H C (S)P h)2]Cl • l/3 C 2H 5OH • 1/3 H 20 (3). The structures o f 1 -3 have been determined. 1: monoclinic, space group P 2 ,/c, a = 1150.1(9), b = 2050.0(9), c = 1181.0(8) pm,/? = 109.62(5)°, Z = 4, 2980 reflections, R = 0.055; 2: trigonal, space group R 3, a = 1399.8(1), c = 1684.0(1) pm, Z = 3, 1419 reflections, R = 0.033; 3: m on o­ clinic, space group P 2,/c, a = 1446.8(3), b = 3220.7(5), c = 1727.1(4) pm, ß = 108.42(2)°, Z = 12, 6112 reflections, R = 0.062. In 1 and 2 three N,S-chelating ligands N H N R (R = C(S)Ph) are coordinated to the central rhenium atom. The ligand structure is intermediate between a diazene and a h ydrazid o(2-) structure. In 3 each rhenium atom is coordinated by one N H N R and two N H N H R ligands, all N,S-chelating. The latter can be considered as protonated diazene ligands. The unit cell contains three isomeric coordination polyhedra. 
  Reference    Z. Naturforsch. 45b, 1167—1176 (1990); eingegangen am 31. Januar 1990 
  Published    1990 
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 Identifier    ZNB-1990-45b-1167 
 Volume    45 
187Author    Johannes Breker, Reinhard Schmutzler, BerndD. Orbath, M. Arkus WieberRequires cookie*
 Title    Reaktionen von unsymmetrischen A5P -A 3P-Diphosphorverbindungen und von Diphosphinen (A3P -A 3P) mit ö-Chinonen Reactions of Unsymmetrical /i5P -/ 3P D iphosphorus Compounds and of Diphosphines (>l3P -A 3P) with o-Quinones  
 Abstract    The reaction o f A5P -x 3P diphosphorus com pounds with o-quinones, e.g. tetrachloro-o-benzoquinone or 2,5-di-te/7-butyl-o-benzoquinone, led not only to oxidative addition o f the o-quinone to A3P but also to insertion o f a further molecule o f o-quinone into the P -P bond (i.e. x5P -Ä 3P diphosphorus com pound and o-quinone reacted in a molar ratio 1:2). In the course o f these oxidative addition and insertion reactions the o-quinones were converted into the corresponding hydroquinones (i.e. catechols). The products o f these reactions were charac­ terized by N M R and mass spectrometric methods, and by elemental analysis. The hydrolysis o f the 1:2 addition products proceeded with cleavage o f a P -O -C (hydroquinone) bond and formation o f mononuclear products, involving Ä4P and A5P, respectively. A mechanism o f this hydrolysis is proposed and has been elucidated by independent synthesis o f some products. Diphosphines, i.e. symmetrical A3P -z 3P diphosphorus compounds, were found to react with o-quinones in the same fashion in a molar ratio 1:3, i.e. with oxidative addition o f the o-quinone to both x3P atom s and insertion o f tetrachloro-o-catechol into the P -P bond. 
  Reference    Z. Naturforsch. 45b, 1177—1186 (1990); eingegangen am 13. Oktober 1989 
  Published    1990 
  Keywords    Phosphoranes, Insertion, Oxidative Addition 
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 Identifier    ZNB-1990-45b-1177 
 Volume    45 
188Author    Hans Pritzkow, Klaus Rail, Wolfgang SundermeyerRequires cookie*
 Title    Darstellung perhalogenierter Mesylsulfene, X3C -S 0 2-C (X )= S 0 2 , und ihre Stabilisierung durch Chinuclidin Preparation of Perhalogenated Mesylsulfenes, X 3C -S 0 2-C (X ) = S 0 , and their Stabilization with Chinuclidin  
 Abstract    Thione-S,S-dioxides, Chloro(trichloromethanesulfonyl)sulfene, Bromo(tribromomethane-sulfonyl)sulfene, Quinuclidine A dducts, Sulfonate Derivatives 
  Reference    Z. Naturforsch. 45b, 1187—1192 (1990); eingegangen am 16. Februar 1990 
  Published    1990 
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 Identifier    ZNB-1990-45b-1187 
 Volume    45 
189Author    Klaus Brodersen, Axel KnörrRequires cookie*
 Title    Synthese und Kristallstruktur von |H g2(p-SC6H 4N 0 2) ]N 0 3 Synthesis and Crystal Structure of [Hg2(/?-SC6H 4N 0 2)]N03  
 Abstract    Nitrothiophenolato-dimercury(I)-dinitrate, Synthesis, Crystal Structure [Hg2(/7-SC6H4N 0 2)]N 0 3 is formed by the reaction o f p-nitrothiophenol with dimercury(I)-dinitrate in methanol. It crystallizes in the m onoclinic space group P 2 Jn with a = 1175.5(9) pm, b = 1079.8(8) pm, c = 876.2(8) pm, ß = 110.74(4)° and Z = 4. The crystal struc­ ture has been determined by X-ray diffraction and refined to an /?-value o f 0.052. The results show that the com pound exists as a chain structure o f i [ —®S(C6H4N 0 2) -H g -H g —]" with nitrate ions connecting the chains. 
  Reference    Z. Naturforsch. 45b, 1193 (1990); eingegangen am 23. Februar 1990 
  Published    1990 
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 Identifier    ZNB-1990-45b-1193 
 Volume    45 
190Author    H. Bock, P. Hänel, H.-F HerrmRequires cookie*
 Title    Elektronentransfer und Ionenpaare, 15 [ 1 -3] Radikalanion und Radikal-Kontakt-Ionenpaare von Dimesityl-tetraketon Electron Transfer and Ion Pairing, 15 [ 1 -3] Radical Anion and Radical Ion Pairs of Dimesityl Tetraketone  
  Reference    Z. Naturforsch. 45b, 1197—1204 (1990); eingegangen am 22. Januar 1990 
  Published    1990 
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 Identifier    ZNB-1990-45b-1197 
 Volume    45 
191Author    Gerhard Erker, M. Arkus Albrecht3, StefanW. Ernerb, CarlK. RügerbRequires cookie*
 Title    Formation and Structure of [Cp2Zr(CH3)OAl(CH3)2l2 " a Neutral Dimethylzirconocene/Alumoxane Adduct  
 Abstract    Zirconium/Alum inum Complexes, M ixed M etal Compounds, Alumoxane Derivatives, H om ogeneous Ziegler Catalysts Trimethylaluminum adds to cyclotrimeric zirconocene oxide [Cp2ZrO]3 to give the cyclo-dimeric mixed metal complex [Cp2Zr(CH 3)O Al(C H 3)2]2 (3a-dimer) featuring a central A 120 2 containing four-membered ring system. Complex 3a-dimer crystallizes in space group P 2 ,/c with cell parameters a = 8.3974(8), b = 8.6509(7), c = 19.718(1) Ä, ß = 97.36(1)°, Z = 2, R = 0.029, Rw = 0.038. With methylalum oxane 3a-dimer gives an active catalyst (Z r: Al ==1:8) for ethylene polymerization. 
  Reference    Z. Naturforsch. 45b, 1205 (1990); received January 4 1990 
  Published    1990 
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 Identifier    ZNB-1990-45b-1205 
 Volume    45 
192Author    Hans-W Alter, Swidersky, K. Urt DehnickeRequires cookie*
 Title      
 Abstract    [OsC14(C H 3C N)2] • 1/2C H 3CN has been pre­ pared by the reaction o f OsCl5 with acetonitrile in a slow reaction at room temperature, forming red, moisture sensitive crystals. The com pound was characterized by IR spectroscopy as well as by an X-ray structure determination. Space group Pnma, Z = 4, 1281 observed unique reflexions, R = 0.031. Lattice dimensions at 20 °C: a = 1032.5(5), b = 1356.0(7), c = 975.9(5) pm. The complex has a molecular structure, in which the osmium atom is octahedrally coordinated by four chlorine atoms and by two N -atom s o f the cis-coordinated acetonitrile molecules. The included C H 3C N m olecules are disordered in two posi­ tions. 
  Reference    Z. Naturforsch. 45b, 1210—1212 (1990); eingegangen am 26. Februar 1990 
  Published    1990 
  Keywords    Acetonitrile Solvate o f Osmium Tetrachloride, Synthesis, IR Spectra, Crystal Structure 
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 Identifier    ZNB-1990-45b-1210_n 
 Volume    45 
193Author    PeterG. Jones, G. Raham Bodwell, Henning HopfRequires cookie*
 Title    Preparation and X-Ray Structure of [2.2](5,6)Indanocyclophane  
 Abstract    The title compound 3 was prepared by pyroly­ sis o f the corresponding bis-sulfone 2 and subject­ ed to X-ray structural analysis; space group P I, a = 477.0(1), b = 625.6(2), c = 1363.6(3) pm, a = 82.79(2), ß = 83.43(2), y = 78.18(3)°, Z = 1, R = 0.058 for 900 reflections. The molecule contains a crystallographic symmetry centre, thus confirm­ ing the anti configuration. 
  Reference    Z. Naturforsch. 45b, 1213—1215 (1990); received February 20 1990 
  Published    1990 
  Keywords    C yclophane, Indanocyclophane, Configuration, X -R ay 
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 Identifier    ZNB-1990-45b-1213_n 
 Volume    45 
194Author    G. C. Papavassiliou, D. J. Lagouvardos, V. C. Kakoussis, G. A. MousdisRequires cookie*
 Title      
 Abstract    Ethylenedioxybenzotetrathiafulvalene (ED O BTTF), ethylenedioxypyridino[4,5-b]tetra-thiafulvalene (EDOP[4,5-b]TTF), ethylenedioxy-methylenedithiotetrathiafulvalene (EDOM DTTTF), ethylenedioxyvinylenedithio-tetrathiafulvalene (E D O V D T T T F), and ethylene-dioxom ethylenediselenotetrathiafulvalene (E D O M D ST T F) have been prepared and charac­ terized analytically and spectroscopically. 
  Reference    Z. Naturforsch. 45b, 1216—1218 (1990); received January 15 1990 
  Published    1990 
  Keywords    Tetrathiafulvalenes, 7r-Donors, Organic Conductors 
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 Identifier    ZNB-1990-45b-1216_n 
 Volume    45 
195Author    Rolf-Rüdiger Krüger, W. Alter, AbrielRequires cookie*
 Title    Über das Hochdruckverhalten von Gips On the Behaviour of Gypsum under High Pressure  
 Abstract    The decom position o f gypsum (dehydration) was studied in the pressure range 7 .5 -6 0 kbar and the temperature range 7 5 -4 0 0 °C using a belt type apparatus. Surprisingly, gypsum is rather stable even at pressures greater than 20 kbar contradicting the results o f a calculation o f the space requirement o f the competing phases (A I I -C a S 0 4 + H-,0; Hemihydrate + H20). Only when rising the temperature, as the most important thermodynamic variable for this reaction, the kinetically controlled decomposition starts. N o acceleration o f the dehydration process under shear stress (simple squeezer device) could be detected due to the limited (not geological) time. 
  Reference    Z. Naturforsch. 45b, 1221—1226 (1990); eingegangen am 27. Februar 1990 
  Published    1990 
  Keywords    Gypsum, Hydrates, High-Pressure, D ecom position 
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 Identifier    ZNB-1990-45b-1221 
 Volume    45 
196Author    Jürgen Pebler, K. Urt Dehnicke, Dieter FenskeRequires cookie*
 Title    Acetylenkomplexe von Rhenium(+VI). Die Kristallstrukturen von |ReCl4(/i-C3H 7—C = C -/i-C3H 7)(POC13)] und ReCl4(THF)2  
 Abstract    Alkyne Complexes o f Rhenium(+ VI). The Crystal Structures of [ReCl4(«-C3H 7-C = C -h-C 3H 7)(POC13)] and ReCl4(T H F)2 Hans-W alter Swidersky, The results o f the magnetic susceptibility measurements o f the previously reported rhenium alkyne complexes [ReCl4(P h C = C P h)]2 • 2 C H 2C12 and [ReCl4(P hC =C P h)(C H 3CN)] in the tem­ 
  Reference    Z. Naturforsch. 45b, 1227—1234 (1990); eingegangen am 20. Februar 1990 
  Published    1990 
  Keywords    Alkyne Complexes o f Rhenium( + VI), IR Spectra, M agnetic Susceptibility, Crystal Structure 
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 Identifier    ZNB-1990-45b-1227 
 Volume    45 
197Author    G. Ünter Schmid, AbdelK. Boutrid, Eva-M Aria KreuzerRequires cookie*
 Title    Azaborolyl-Komplexe, 25 Das (l-terf-Butyl-2-methyl-l H-l,2-azaborolyl)cobalt-Fragment (AbCo) als Synthesebaustein Azaborolyl Complexes, 25 The (l-/ej7-Butyl-2-methyl-l H -l,2-azaborolyl)cobalt Fragm ent (AbCo) as Building Block in Synthesis  
  Reference    Z. Naturforsch. 45b, 1235—1242 (1990); eingegangen am 19. März 1990 
  Published    1990 
  Keywords    1 H -l, 2-A zaborolyl-cobalt, Ethene, Phosphine, Carbonyl Derivatives, Cobalt Clusters (di-, tri-, and tetranuclear) 
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 Identifier    ZNB-1990-45b-1235 
 Volume    45 
198Author    Michael Schäfer, Jürgen Pebler, Beatrice Borgsen, Frank Weller, K. Urt DehnickeRequires cookie*
 Title    21Sb-Mössbauer-spektroskopische und strukturchemische Untersuchungen an Kronenetherkomplexen SbX3(15-Krone-5) mit X = F, Cl, Br, I. Eine Analyse der Orbitalbesetzungszahlen 12lSb-M össbauer-Spectroscopic and Structural Investigations on Crown Ether Complexes SbX3(15-Crown-5) with X = F, Cl, Br, I. A Population Analysis Crown Ether C om plexes SbX3(15-crown-5)  
 Abstract    The crown ether complexes SbX3(15-crown-5) with X = F, Cl, Br, and I have been prepared by reactions o f 15-crown-5 with the corresponding antimony trihalides in acetonitrile solu­ tions. The com pounds were characterized by IR spectroscopy as well as by l21Sb-M össbauer spectroscopy. A m ethod o f orbital population analysis utilizing both M össbauer isomer shifts and quadrupole coupling has been developed for Sb(III) antimony halides and their crown ether com plexes. SbF 3(l 5-crown-5) was also characterized by an X-ray structure determination: Space group P 2 ,/«, Z = 4, 3628 observed unique reflexions, R = 0.032. Lattice dim ensions at 19 °C: a = 891.54(6), b = 1277.26(6), c = 1277.66(7) pm, ß = 95.029(4)3. The com plex has a molecular structure in which the antimony atom is surrounded by three F-atom s with mean bond lengths o f 192.4 pm and by the five oxygen atom s o f the crown ether molecule with mean bond lengths o f 293.9 pm. 
  Reference    Z. Naturforsch. 45b, 1243—1250 (1990); eingegangen am 5. März/9. Mai 1990 
  Published    1990 
  Keywords    Syntheses, IR Spectra, 12lSb-M össbauer Spectra, Crystal Structure 
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 Identifier    ZNB-1990-45b-1243 
 Volume    45 
199Author    Wolfgang Hönle, Leonhard Walz, Hans Georg, Von SchneringRequires cookie*
 Title    Bildung und Kristallstruktur von Ethylendiammonium-hydridotrioxophosphat(2 -) [^ N C F ^ C t^ N F y iP H C ^ p Form ation and Crystal Structure of Ethylenediammonium H ydridotrioxophosphate(2-) [HjNCFUCHoNI-ytPHO,]  
 Abstract    Ethylenediammonium H yd ridotrioxophosphate(2-) [HjNCH-jCH-jNHjJITHO:,] is formed by slow oxidation o f white phosphorus by oxygen in ethylendiamine. It crystallizes in the space group Pbca with a = 1570.6(4) pm, b = 676.9(5) pm, c = 1267.8(4) pm and Z = 8 formula units in the unit cell. The structure is built from ethylenediammonium dications and tetra­ hedral phosphonate dianions, linked by O -H -N bonds (d(O--N) = 275.8 pm). The bond distances are d (P -O) = 151.8 pm, d (P -H) = 136.9 pm, d (N -C) = 148.3 pm and d (C -C) = 151.0 pm. 
  Reference    Z. Naturforsch. 45b, 1251—1254 (1990); eingegangen am 13. Februar 1990 
  Published    1990 
  Keywords    Ethylenediammonium H ydridotrioxophosphate(2-), Crystal Structure, Formation, Phosphonate Dianion, Ethylenediammonium Dication 
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 Identifier    ZNB-1990-45b-1251 
 Volume    45 
200Author    Roswitha Schmidt, Brigitte Eisenmann, Rüdiger Kniep, Jürgen Ensling, Philip Gütlich, Reinhard SeidelRequires cookie*
 Title    Zn2(Z n,_;tFe,)Fel" (P 0 4)3 * 2 H 20 : Darstellung, Kristallstruktur und Mößbauer-Untersuchung Zn2(Z n]_ vF ex .)FeIII(P 0 4)3 -2H 20 : Preparation, Crystal Structure and M össbauer Investigation  
 Abstract    Single crystals o f the mixed valency phase Zn2(Z n ,_vF eY)F ein(P0 4)3-2 H20 were grown by hydrothermal treatment o f phosphophyllite (Zn2F e (P 0 4)2-4 H 20) at 160 C in 1 M H3P 0 4. The crystal structure (tricl., P i; a = 641.5(4) pm, b = 914.4(4) pm, c = 983.4(4) pm, a = 70.79(5)°, ß = 78.32(5)°, y = 73.69(5)°; Z = 2) contains P 0 4 tetrahedra, connected via vertices shared with coordination polyhedra o f the metal ions. Cation coordination polyhedra (Fem(Op)5Ow octahedra, (Z n|_vFeY)(O p)5Ow octahedra and Zn(Op)5 trigonal bipyramids) are connected to centrosymmetrical six-membered chains by sharing com m on O -edges. These short chains are interconnected by com m on vertices o f Zn(Op)4 tetrahedra to form infinitive ribbons o f cation coordination polyhedra. The x-values observed for the substitutional posi­ tion (Zn,_A .Fev) varied from .x: = 0.5 (single crystal determ ination) to "y = 1 (Mössbauer investi­ gation). The M össbauer parameters are consistent with high-spin iron in a slightly distorted octahedral environment and valence states (II) and (III). 
  Reference    Z. Naturforsch. 45b, 1255—1261 (1990); eingegangen am 19. April 1990 
  Published    1990 
  Keywords    Orthophosphate Zn/Fe, Mixed Valency C om pound, Hydrothermal Growth, Crystal Structure, Mössbauer Parameters 
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 Identifier    ZNB-1990-45b-1255 
 Volume    45 
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