| | 1 | Author
| RainerM. Attes, Bernd Füsser | Requires cookie* | | | Title
| Salze der 1.2-Hydrazin-bis(dithiocarbonsäure): Darstellung, Schwingungsspektren und Struktur Preparation, V ibrational Spectra and Structure of Alkahm etal Salts of the l,2-H ydrazine-bis(dithiocarboxylic Acid)  | | | | Abstract
| The following salts of the l,2-hydrazine-bis(dithiocarboxylic acid) have been prepared: Mi[S->CNH —NHCS^], M = N a, K and M3[S->CN-NHCS2], M — Na, K. In the solvated crystals K2 1S2C N H -N H C S 2 '] • 4 C H 3O H (a = 718.0(5), b = 1329.3(8), c = 937.7(9) pm , ß = 109.26(6)°, space group C2/m , Z = 2) the [S2C N H -N H C S 2]2" ion possesses crystallographic C2h sym metry, i.e. a trans planar structure with a N -N bond length of 139.2(3) pm. V ibrational spectra indicate a lower sym metrical anion in the unsolvated crystals. In the trianion [S2CN —N HCS2]3_ the C —N stretching vibrations are observed at 1400 and 1310 cm" 1. | | | |
Reference
| (Z. Naturforsch. 39b, 1 [1984]; eingegangen am 14. Septem ber 1983) | | | |
Published
| 1984 | | | |
Keywords
| l, 2-H ydrazine-bis(dithiocarboxylates), Preparation, Crystal Structure, V ibrational Spectra | | | |
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| default:Reihe_B/39/ZNB-1984-39b-0001.pdf | | | | Identifier
| ZNB-1984-39b-0001 | | | | Volume
| 39 | |
| 6 | Author
| Karl-Friedrich Tebbe, Magda Fehér | Requires cookie* | | | Title
| Beiträge zur Strukturchemie phosphorhaltiger Ketten und Ringe, IX [1] | | | | Abstract
| Die Molekül-und Kristallstruktur von Tri-terf-butylcyclotriphosphan-pentacarbonyl-chrom(O), [(f-BuP)3Cr(CO)5] Structural Chemistry of Phosphorus-Containing Chains and Rings, IX [1] The M olecular and Crystal Structure of Tri-/m -butylcydotriphosphane-pentacarbonyl-chrom ium (0), [(r-BuP)3C r(C O)5] The structure of [(f-BuP)3C r(C O)5], C 17CrH2705P3, has been determ ined by single crystal X-ray techniques, solved by 'direct m ethods', and refined to R = 0.048, wR = 0.050 for 3657 reflections by blocked least squares. The com pound crystallizes in the space group P 2x/c with a = 1664.9 pm , b — 916.5 pm , c = 3089.8 pm, ß = 91.45° and Z = 8 formula units. The structure consists of two crystallographically independent but structurally nearly identical m ononuclear [(r-BuP)3C r(C O)5] complexes with the three-m em -bered ring (/-BuP)3 as an unidentate a-donor ligand. Com pared to the free molecule (r-BuP)3 the cyclophosphane ligand is slightly distorted on account of its coordination to the C r(C O)5-group. | | | |
Reference
| (Z. Naturforsch. 39b, 37—42 [1984]; eingegangen am 8. Juli 1983) | | | |
Published
| 1984 | | | |
Keywords
| Tri-ter/-butylcyclotriphosphane-pentacarbonyl-chrom ium (0), Tri-tert-butylcyclotriphospane, Cyclotriphosphane Complex, Chromium Complex, Crystal Structure | | | |
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| default:Reihe_B/39/ZNB-1984-39b-0037.pdf | | | | Identifier
| ZNB-1984-39b-0037 | | | | Volume
| 39 | |
| 7 | Author
| | Requires cookie* | | | Title
| Ein neuer Wasserstoffbrücken-Typ: Intramolekulare S—H**-S-Brücken in Dithiotropolon | | | | Abstract
| A n organisch-C hem isches In stitu t d e r U n iv e rsitä t M ü n ster, C o rre n sstraß e 36, D-4400 M ü n ster Z. N atu rfo rsch . 39b, 4 3 —49 (1984); e ingegangen am H ydrogen B o n d , S ulfur, D ith io tro p o lo n e , C rystal S tru c tu re , V ib ratio n al Spectra In d ith io tro p o lo n e (2 -m e rc ap to c y clo h ep ta trien e th io n e) a novel type o f S — H -S hydrogen bond is o b se rv ed from spectro sco p ic resu lts and from a single crystal X -ray stru c tu re analysis. In tra m o le c u la r S —H ---S b o n d s w ith a very short S---S sep aratio n of 3.13 Ä an d w ith d(S--H) = 2.10 Ä , < (S — H ---S) — 136° a re fo rm ed , the S — H stretching frequency o f 2450 c m -1 being lo w ered by a b o u t 120 c m -1 from th e value for the free SH group. A different relatio n sh ip betw een S---S bridge b o n d distan ces an d S —H stretching frequencies applies as c o m p a red to the in te rm o le cu la r bridges o f th io p h o sp h in ic an d thiocarbonic acids. C rystalline d ith io tro p o lo n e is m onoclinic, space g ro u p P2J/C, Z = 8, w ith a — 8.352(2), b = 13.806(4), c = 12.371(2) Ä , ß — 103.46(2)°. | | | |
Reference
| (Z. Naturforsch. 39b, 43 [1984]) | | | |
Published
| 1984 | | | |
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| default:Reihe_B/39/ZNB-1984-39b-0043.pdf | | | | Identifier
| ZNB-1984-39b-0043 | | | | Volume
| 39 | |
| 9 | Author
| | Requires cookie* | | | Title
| Metallzentrum [2] | | | | Abstract
| Reactions of M etal-C oordinated Carbon Monoxide with Ylides, XV III [1] Ironacyl Phosphorus Ylides with an Isocyanide-Substituted M etal C entre [2] A ndrea Stasunik und Wolfgang Malisch In stitu t für A no rg an isch e C hem ie d e r U niversität W ürzburg, A m H u b la n d , D -8700 W ürzburg | | | |
Reference
| (Z. Naturforsch. 39b, 56 [1984]) | | | |
Published
| 1984 | | | |
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| default:Reihe_B/39/ZNB-1984-39b-0056.pdf | | | | Identifier
| ZNB-1984-39b-0056 | | | | Volume
| 39 | |
| 13 | Author
| Pr | Requires cookie* | | | Title
| O C r! | | | | Abstract
| Chrom atographie gereinigt in 35% (2) bzw. 20% (3) erhalten werden können; diese R eaktionen lassen sich offensichtlich auch mit Li2C O T durchführen [4]. Die Struktur von 2 und 3 als (E ,Z ,Z ,E)-1.8-B is(dior-ganylphosphino)octa-1.3.5.7-tetraen folgt aus den 31P -NM R-Spektren mit d P = 3,5 (R = /-Propyl) und dp = —12,8 (R = Phenyl) sowie aus den *H-und 13C -NM R-Spektren; die Zuordnung letzterer er folgte durch Messung bei 25,2 und 75,4 M Hz und durch selektive Bestrahlung der Protonen an C -l und C-3. Die beobachteten Kopplungen sind mit denen von Z-und E-D iphenylpropen-l-yl-phosphan im Einklang [5]. Nach unseren Ergebnissen ist die Z u ordnung der 13C -N M R-Spektren in [4] unzutreffend. 2: 13C -NM R (75 M Hz, CDC13): <5 = 132,4, Jp = 18,2 (C -l), 140,1, 2Jp = 33,0 (C-2), 131,1, 3/ P = 13,9 (C-3), 124,7, % < 0,5 (C-4), 23,5, JP = 8 , 8 (P -C H) , 19,8, 18,7, 2J? = 17,6 u. 8,3 (CH 3) ; 'H -N M R (400 M Hz, C6D 6): <5 = 6,1, J P = 3,4 (H -l), 7,4, 3/ P = 12 (H-2), 6,05 (H-3), 6,42 (H-4), J = 12,5 (H -4/H -4'), J = 1,3 (H -4/H -3'), 1,71, Jp = 1,4 (P -C H) , 1,09 u. 1,03 (C H 3). Nach 3-monatigem Stehen einer Probe von 2 in CDC13 ist diese in das all-trans-Isom ere 2 a umgela-80 | | | |
Reference
| (Z. Naturforsch. 39b, 79 [1984]) | | | |
Published
| 1984 | | | |
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| default:Reihe_B/39/ZNB-1984-39b-0079.pdf | | | | Identifier
| ZNB-1984-39b-0079 | | | | Volume
| 39 | |
| 18 | Author
| G. M. Ourier, L. M. Oroder, A. Previero | Requires cookie* | | | Title
| Prevention of Tryptophan Oxidation During Iodination of Tyrosyl Residues in Peptides | | | | Abstract
| ch e rch e IN S E R M , 60 rue N avacelles, 34100 M o n tp e llier (F ra n ce) an d *M ax-P lanck-Institut fü r B iochem ie, D-8000 M artin sried (G e rm a n y) Z . N a tu rfo rsch . 39b, 1 0 1 -1 0 4 (1984); received July 20, 1983 Io d in a tio n o f T yrosyl R esid u es, O xidative D e g rad a tio n o f T ry p to p h a n , N in-F orm yl T ry p to p h a n S tu d ies on m odel system s clearly revealed oxidative d e g rad a tio n o f try p to p h a n u n d e r th e usual co n d itio n s o f io d in a tio n o f tyrosine residues in p e p tid e s, w h ereb y th e ra te o f fo rm e r re ac tio n w as fo u n d to be fa ster th a n the io dination itself. N in-form ylation o f try p to p h a n brings a b o u t an efficient in d o le p ro tec tio n against this oxidative d e g rad a tio n . | | | |
Reference
| (Z. Naturforsch. 39b, 101 [1984]) | | | |
Published
| 1984 | | | |
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| default:Reihe_B/39/ZNB-1984-39b-0101.pdf | | | | Identifier
| ZNB-1984-39b-0101 | | | | Volume
| 39 | |
| 19 | Author
| D. Arstellun, J. K. Etterer, V. Krämer | Requires cookie* | | | Title
| N O T IZ E N Preparation and Crystal D ata of the Isotypic Bism uth Oxide H alides Bi50 7I and Bi50 7Br | | | | Abstract
| und K ristalldaten der isotyp en W ism u t-O xid -H alogen id e B i50 7I und B i50 7Br The title compounds were prepared (a) polycrys-talline by sintering the binary components and (b) single-crystalline by a wet chemical method. They crystallize in the space group Cmca with the lattice parameters a = 16.244(2), b = 5.342(1), c — 23.006(4) and 16.099(2), 5.296(1), 22.995(6) Ä, resp. Their X-ray powder diffraction data are listed. | | | |
Reference
| (Z. Naturforsch. 39b, 105 [1984]; eingegangen am 24. August 1983) | | | |
Published
| 1984 | | | |
Keywords
| Bismuth Oxide Iodide, Bismuth Oxide Bromide, Preparation, Crystal Structure | | | |
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| default:Reihe_B/39/ZNB-1984-39b-0105_n.pdf | | | | Identifier
| ZNB-1984-39b-0105_n | | | | Volume
| 39 | |
| 20 | Author
| W. Hiller, J. Strähle, H. Prinz, K. Dehnicke | Requires cookie* | | | Title
| The Crystal Structure of PPh3M e[N bO Cl4(C H 3CN)] | | | | Abstract
| X-Ray, Methyltriphenylphosphonium-Oxotetrachloroniobate Acetonitrile The X-ray structure of PPh3Me[NbOCl4(C H 3CN)] at 210 K was solved (space group P I, two formula units per unit cell, a = 1173.5(5), b = 1130.1(4), c = 946.8(3) pm, a = 97.70(4), ß = 93.57(3), y = 78.62(3)°, 3688 inde pendent reflexions, R — 0.025). The material consists of cations [P(C6H5)3CH3]® and anions [NbOCl4(CH3CN)]e . The nitrogen atom of the acetonitrile solvate molecule is coordinated to the niobium centre in the fra/is-position to the oxo ligand; the NbO bond length of 169 pm corresponds to a double bond. | | | |
Reference
| (Z. Naturforsch. 39b, 107 [1984]; eingegangen am 2. August 1983) | | | |
Published
| 1984 | | | |
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| default:Reihe_B/39/ZNB-1984-39b-0107_n.pdf | | | | Identifier
| ZNB-1984-39b-0107_n | | | | Volume
| 39 | |
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