| 1 | Author
| Norbert Kuhn, Joanna Fahl, Riad Fawzi, Cäcilia Maichle-Mößmer, Manfred Steimann | Requires cookie* | | Title
| Stable Carbene Adducts of Chlorine [1]  | | | Abstract
| The carbene adducts 3a-c (R 1 = Me, Et, iso-Pr; R2 = Me) are formed from the 2,3-dihydro-imidazol-2-ylidenes la-c and 1,2-dichloroethane as air-sensitive solids in good yields. The compounds exhibit a reactive Cl-Cl bond. Benzene is chlorinated by 3a,b to give chlorobenzene and the imidazolium salts 10a,b under mild conditions. 3c acts as a chloride donor to give with AICI3 and S 0 2 the 2-chloroimidazolium salts 12c andl3c (X = A1C14, S 0 2C1). On hydrolysis, the less reactive hydrate salt 14c is formed from 3c. The X-ray structures of 10a and 14c are reported. | | |
Reference
| Z. Naturforsch. 53b, 720—726 (1998); eingegangen am 23. Februar 1998 | | |
Published
| 1998 | | |
Keywords
| Carbene, Chlorine, X-Ray Data | | |
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| default:Reihe_B/53/ZNB-1998-53b-0720.pdf | | | Identifier
| ZNB-1998-53b-0720 | | | Volume
| 53 | |
2 | Author
| Henri Brunner1, ManfredM. Uschiol3, Thomas Neuhierl3, Bernhard Nuberb | Requires cookie* | | Title
| Copper Complexes with the Ligand [Cp2MoH2]  | | | Abstract
| The reaction of CuCl with [CP2M0H2] yields the complex [Cu(Cp2M oH2)2Cl]. An X-ray structure analysis shows that the coordination of the copper(I) ion by two [CP2M0H2] lig ands and the chloride ion is pseudo-trigonal planar. The hydride ligands were located by using difference Fourier methods. A manifold of reactions took place when an aqueous so lution of CUSO4 was treated with a solution of [Cp2M oH 2] in dichloromethane in a 1:2 molar ratio. The X-ray structure analysis established a polymeric structure of the complex [Cu(Cp2MoH2)2Cu(Cp2M oH2)S0 4 ]" with two different copper centers. | | |
Reference
| Z. Naturforsch. 54b, 337—340 (1999); received September 25 1998 | | |
Published
| 1999 | | |
Keywords
| Copper, Molybdenum, X-Ray Data | | |
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| default:Reihe_B/54/ZNB-1999-54b-0337.pdf | | | Identifier
| ZNB-1999-54b-0337 | | | Volume
| 54 | |
3 | Author
| R. En, C. Su, PetraD. Örrb, M. Artin, K. Ühnb, ClausK. Rieger0, M. Ikhael, Y. A. Ntip In D | Requires cookie* | | Title
| Chiral Pool Synthesis of 4a-Substituted Carbocyclic Cyclopentanoid Nucleoside Precursors, I  | | | Abstract
| A suitable protected D-ribono-1,4-lactone derivative has been used for the straightforward chiral pool synthesis of cyclopentanoid nucleoside precursors. Thus, epoxidation followed by deoxygenation or regioselective ring opening led to nucleoside precursors modified at the positions C(4), C(4a) and C(4,4a) as well as side-chain modified derivatives. The structures of the key intermediates were determined by X-ray analyses. | | |
Reference
| Z. Naturforsch. 54b, 1068—1078 (1999); received May 21 1999 | | |
Published
| 1999 | | |
Keywords
| Nucleosides, Carbohydrates, X-Ray Data | | |
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| default:Reihe_B/54/ZNB-1999-54b-1068.pdf | | | Identifier
| ZNB-1999-54b-1068 | | | Volume
| 54 | |
5 | Author
| Carsten Handrosch, FrankW. Heinemann, Horst Kisch | Requires cookie* | | Title
| Serendipitous Formation of the Cyclic Sulfite DIMTH(S0 3 ) by Reaction of DIMTH(OH)2 with SOCl2  | | | Abstract
| The reaction of the acetonide protected derivative of tartaric acid, D IM TH(OH)2 (1) (1,6-di-desoxy-3,4-0-isopropylidene-2,5-di-C-methyl-threo-hexitol), with SO C h/N E tj does not lead to the expected dichlorinated species 2, but affords the cyclic sulfite DIM TH(SÜ 3) (3) ((1R , 7/?)-9,9-dimethyl-4-oxide-2,2,6,6-tetramethyl-4-thia-3,5,8,10-tetraoxabicyclo-[5,3,0] de cane) as indicated by X-ray structural analysis. | | |
Reference
| Z. Naturforsch. 54b, 1015—1018 (1999); received April 16 1999 | | |
Published
| 1999 | | |
Keywords
| Cyclic Sulfite, X-Ray Data, Tartaric Acid | | |
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| default:Reihe_B/54/ZNB-1999-54b-1015.pdf | | | Identifier
| ZNB-1999-54b-1015 | | | Volume
| 54 | |
6 | Author
| Norbert Kuhn, Elke Niquet, Manfred Steimann, Isabel Walker | Requires cookie* | | Title
| Methoxyalky 1-funktionalisierte 2,3-Dihy droimidazol-2-ylidene [ 1 ] Methoxyalkyl Functionalized 2,3-Dihydroimidazol-2-ylidenes [1]  | | | Abstract
| The 2,3-dihydro-l,3-di(methoxyalkyl)imidazol-2-ylidenes are obtained from the correspon ding cyclic thioureas and potassium. With CS2, the imidazolium dithiocarboxylates are formed. The results of X-ray structure determinations of two of these products are reported. | | |
Reference
| Z. Naturforsch. 54b, 1181—1187 (1999); eingegangen am 8. Juni 1999 | | |
Published
| 1999 | | |
Keywords
| Carbenes, Imidazoles, Dithiocarboxylates, X-Ray Data | | |
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| default:Reihe_B/54/ZNB-1999-54b-1181.pdf | | | Identifier
| ZNB-1999-54b-1181 | | | Volume
| 54 | |
7 | Author
| KaterynaE. Gubina3, VladimirA. Ovchynnikova, VladimirM. Amirkhanov3, Tatyana Yu, ViktorV. Sliva3, Tadeusz Skopenko3, Henryk Glowiakb, Kozlowskib | Requires cookie* | | Title
| Carbacylamidophosphates: Structure and Properties of Bis(N,N,-morpholido)-[(N"-morpholido)-carboxamido] phosphate  | | | Abstract
| The bis(N,N'-morpholido)-[(N"-morpholido)-carboxamido] phosphate: 0 (CH2 CH2)NC(0)-N(H)P(0)[N (CH 2 CH 2)0 ] 2 [HL], has been prepared and characterized by means of IR, 31P and 'H NM R spectroscopy and X-ray diffraction (triclinic, a = 9.282(2), b = 9.308(2), c = 21.341(4) Ä, a = 80.79(3)°, ß = 80.92(3)° 7 = 66.92(3)°, V = 1665.1(6) Ä 3, space group P i, Z = 4 and R = 0.0423, wR2 = 0.1303 for 6774 unique reflections used). The unit cell consists of two independent molecules connected by hydrogen bonds N-H...O=P into non-symmetric dimers. The compound behaves as a HL molecule with a protonation constant corresponding to the -C (0)N (H)P (0)-group of pK = 8.65 as determined by potentiometric studies. | | |
Reference
| Z. Naturforsch. 54b, 1357—1359 (1999); received March 29 1999 | | |
Published
| 1999 | | |
Keywords
| Carbacylamidophosphates, X-Ray Data, NMR Data | | |
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| default:Reihe_B/54/ZNB-1999-54b-1357.pdf | | | Identifier
| ZNB-1999-54b-1357 | | | Volume
| 54 | |
8 | Author
| BirteA. Hrens, PeterG. Jones, Sonderdruckanforderungen An, ProfP G Dr, Jo | Requires cookie* | | Title
| P olysulfonylam ine, C X X II  | | | Abstract
| [1] N ich t-kon ven tion elle W asserstoff brücken in B is[diphenylphosphino-(diphenylphosphinselenid)m ethan]-gold(I)-di(m ethansulfonyl)am id Polysulfonylamines, CXXII. Non-Conventional Hydrogen Bonds in Bis[diphenylphosphino(diphenylphos-phinselenide)methane]gold(I) Di(methanesulfonyl)amide In the crystal structure of (dppmSe)2Au+ N (S 0 2C H 3)2-(dppm = Ph2PCH2PPh2) chains are formed from non-conventional hydrogen bonds of the type C -H --0 . Within these chains two bi furcated hydrogen bond systems are present, each involving one methylene hydrogen (H ---0 2.51, 2.65 A) and one phenyl hydrogen (H — O 2.31, 2.35 A) as donors. | | |
Reference
| Z. Naturforsch. 54b, 1474—1477 (1999); eingegangen am 16. Juli 1999 | | |
Published
| 1999 | | |
Keywords
| Gold(I), Hydrogen Bonds, X-Ray Data | | |
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| default:Reihe_B/54/ZNB-1999-54b-1474_n.pdf | | | Identifier
| ZNB-1999-54b-1474_n | | | Volume
| 54 | |
10 | Author
| M. Atthias, W. Esterhausen, Tobias Bollw, Kurt Polborn | Requires cookie* | | Title
| Synthese, Struktur und Reaktivität von Aminomethylpyridin- zinkdihalogeniden Synthesis, Structure and R eactivity o f A m inom ethylpyridine Zinc D ihalides  | | | Abstract
| Zinc dichloride reacts with aminomethylpyridine (AMP) to the corresponding 1:1 adduct 1, whereas ZnBr2 forms an ionic 1:2 complex of the type [(AMP)2ZnBr]+ Br~ 2, which loses one neutral coligand upon heating in M e-C (0)0E t to yield nearly insoluble (AM P)ZnBr2 3. The condensation reaction of these compounds with acetone yields propylideneaminomethylpyri-dine zinc dichloride (4) and dibromide (5), respectively. The reaction of Z nl2 with AMP and acetone gives propylideneaminomethylpyridine zinc dichloride (6) in quantitative yield. The structures of 3, 4, and 6 confirm the linear relationship between the Zn-N distance and the X-Zn-X angle in compounds of the type (L2)ZnX2 with L2 being a bidentate amino base, whereas short Zn-N bonds enforce small X-Zn-X angles. Compound 2 consists of separated ions in the solid state with a five coordinate zinc atom in a distorted trigonal bipyramidal coordination sphere. | | |
Reference
| (Z. Naturforsch. 55b, 51—59 [2000]; eingegangen am 9. November 1999) | | |
Published
| 2000 | | |
Keywords
| Halide, Pyridine Complexes, Zinc, X-Ray Data | | |
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| default:Reihe_B/55/ZNB-2000-55b-0051.pdf | | | Identifier
| ZNB-2000-55b-0051 | | | Volume
| 55 | |
12 | Author
| SvetlanaN. Nikolaeva3, EvgeniV. Avtomonov, Jörg Lorberthb, ValeryS. Petrosyan3 | Requires cookie* | | Title
| The Reaction of Bis[bis(trimethylsilyl)amino]germylene with Bromocyanogen and the Crystal Structure of Bis[bis(trimethylsilyl)amino]bromocyanogermane  | | | Abstract
| Bis[bis(trimethylsilyl)amino)]germylene (1) reacts with bromocyanogen to give bis[bis(trimethylsilyl)amino]bromocyanogermane (2). 2 crystallises from petroleum ether as a colourless solid which has been characterised by IR, H,I3C, 29Si NMR spectroscopy, ele mental analysis and X-ray diffractometry. | | |
Reference
| (Z. Naturforsch. 53b, 9—12 [1998]; received October 7 1997) | | |
Published
| 1998 | | |
Keywords
| Germanium, Germylene, Germyl Cyanide, X-Ray Data | | |
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| default:Reihe_B/53/ZNB-1998-53b-0009.pdf | | | Identifier
| ZNB-1998-53b-0009 | | | Volume
| 53 | |
14 | Author
| VladimirA. Ovchynnikov3, VladimirM. Amirkhanov3 ', TarasP. Timoshenko3, Tadeusz Glowiakb, Henryk Kozlowskib | Requires cookie* | | Title
| Carbacylamidophosphates: Synthesis, Properties, and Structure of Dimorfolido-N-trichloroacetylphosphorylamide  | | | Abstract
| Dimorpholido-N-trichloroacetylphosphorylamide: CCl3C(0)NHP(0)[N(CH2CH2)2 0 ] 2 [HL] and its sodium [NaL] and morpholine [HN(CH2CH2) 2 0 HL] salts were synthesized for the first time. The compounds were studied by IR spectroscopy and assignments of the characteristic IR bands have been made. The structure of [HL] was determined by X-ray diffraction. Crystals are monoclinic, a = 11.412(2) A, b = 16.056(3) A, c = 9.622(2) Ä, ß = 108.55(3)°, space group P2i/c; Z = 4. The refinement of the structure converged at R = 0.066. The molecules are connected into centrosymmetric dimers via hydrogen bonds formed by the phosphorylic oxygen atoms and hydrogen atoms of amide groups. | | |
Reference
| Z. Naturforsch. 53b, 481—484 (1998); received November 11 1997 | | |
Published
| 1998 | | |
Keywords
| Carbacylamidophosphates, IR Data, X-Ray Data | | |
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| default:Reihe_B/53/ZNB-1998-53b-0481.pdf | | | Identifier
| ZNB-1998-53b-0481 | | | Volume
| 53 | |
15 | Author
| PeterG. Jones, Birte Ahrens | Requires cookie* | | Title
| Gold(I)-Komplexe mit Aminliganden, II [1]. (Methylpyridin)-Komplexe von Gold(I) Gold(I) Complexes with Amine Ligands, II. Methylpyridine Complexes of Gold(I)  | | | Abstract
| Gold(I) complexes of overall formula LAuCl (L = various methylpyridines) are non-con ducting in acetone. X-ray structure analyses show that the solid state structure of the cor responding complex 1 (L = 2-picoline) is molecular; the 3-picoline derivative 2 is however ionic (L2A u)+(AuCl2)-. 3-Picoline forms a molecular complex LAuC6F5 (3) and also the ionic (L2Au)+(SbF6)_ (4). Complexes 1, 2 and 4 display short A u--A u contacts, leading to chains of gold atoms; additionally, complexes 3 and 4 show weak Au-F contacts. The (3-picoline)-gold(III) complex /rans-(L2AuCl2)+(SbF6)_ (5) was obtained as a by-product; it too contains short Au-F contacts. | | |
Reference
| Z. Naturforsch. 53b, 653—662 (1998); eingegangen am 6. April 1998 | | |
Published
| 1998 | | |
Keywords
| Gold(l), Pyridine, Amine Complexes, X-Ray Data | | |
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| default:Reihe_B/53/ZNB-1998-53b-0653.pdf | | | Identifier
| ZNB-1998-53b-0653 | | | Volume
| 53 | |
16 | Author
| V. Erena, M.T T Hiede, W. Olfgang, Jeitschko | Requires cookie* | | Title
| Ternary Intermetallic Compounds L«Mn2Ali0 (Ln = Y, La-Nd, Sm, Gd-Dy) and L«Re2Al10 (Ln = Ce, Pr, Sm) with CaCr2Al10-Type Structure  | | | Abstract
| The twelve title compounds have been prepared for the first time. Their CaCnA lio-type structure (PA/nm m, Z = 4) was refined from single-crystal X-ray data for the three representatives TbM mAlio (a = 1274.3(2) pm, c = 511.4(2) pm, R = 0.025 for 680 structure factors F and 43 variable parameters VO, CeRe2Alio (a -1295.5(5) pm, c -517.2(4) pm, R = 0.054 for 810 F a n d 46 V), and SmReaAlio (a = 1291.5(2) pm, c = 516.5(1) pm, R = 0.021 for 622 F and 46 V). The atomic positions of the lanthanoid and transition metal atoms are fully occupied. Significant deviations from the full occupancies were observed for two aluminum sites in TbM mAlio and for all five aluminum sites of the two rhenium-containing compounds, resulting in the compositions TbMn2Al9.63(2), CeRe2Al9.52(8), and SmRe2Al9.i6< 9)-The cell volume of CeRe2Alio and to a smaller extent also that of CeMm A1 io indicate mixed or intermediate +III/+IV valencies of the cerium atoms in these compounds. The structural relationships between the three closely related body-centered tetragonal structures of ThM ni2, CeMn-iAlx, DyFeöAU, and the primitive tetragonal structure of CaCnA lio are briefly discussed. | | |
Reference
| Z. Naturforsch. 53b, 673—678 (1998); received February 2 1998 | | |
Published
| 1998 | | |
Keywords
| Intermetallic Compounds, Crystal Structure, X-Ray Data | | |
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| default:Reihe_B/53/ZNB-1998-53b-0673.pdf | | | Identifier
| ZNB-1998-53b-0673 | | | Volume
| 53 | |
17 | Author
| VladimirA. Ovchynnikov3, VladimirM. Amirkhanov3, AnatoliyA. Kapshuka, Tatyana Yu, Tadeusz Sliva2, Henryk Glowiakb, Kozlowskib | Requires cookie* | | Title
| Synthesis, IR and X-Ray Studies of Tetra(N,N'-tetraethyl-N"-benzoyl- phosphorictriamide)-tetra(/x-3-methoxo)-tetra(methanol)tetra-NickeI(II)  | | | Abstract
| A new nickel(II) complex with N,N'-tetraethyl-N"-benzoylphosphortriamide (HL = C6H5C(0)N(H)P(0)(NEt2)2) of composition Ni4L4(OCH3)4-(HOCH;04 (1) has been synthe sized. The crystal and molecular structure of 1 has been determined from the X-Ray diffraction data (tetragonal, space group P42)C with a = 17.000(2) A, c = 15.338(3) A, Z = 2; R = 0.0399 for 1412 unique reflections). The structure is made up of cubane-like tetramers. In the corners of a cube there are 4 atoms of nickel and 4 atoms of oxygen of methoxy groups. The nickel atoms are characterized by a slightly distorted octahedral environment, which consists of three oxygen atoms of methoxy groups, carbonylic and phosphorylic oxygen atoms of the ligand L~, and an oxygen atom of a methanol molecule. The ligands L~ coordinate to the metal ion forming a chelate via the oxygen atoms of carbonylic and phosphorylic groups. | | |
Reference
| Z. Naturforsch. 53b, 836—840 (1998); received February 23 1998 | | |
Published
| 1998 | | |
Keywords
| Nickel (II), Carbacylamidophosphates, X-Ray Data | | |
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| default:Reihe_B/53/ZNB-1998-53b-0836.pdf | | | Identifier
| ZNB-1998-53b-0836 | | | Volume
| 53 | |
18 | Author
| Norbert Kuhn, Martin Grathwohl3, Manfred Steimann3, Gerald Henkelb, Herrn | Requires cookie* | | Title
| .2-Bis( 1' ,31 -dimethy limidazolin-21 -iminato)ethan - ein neuer Chelatligand [1]  | | | Abstract
| The reaction of 2-imino-l,3-dimethylimidazoline (10, ImNH) with X-CH2CH2-X (11, X = p-CH3C6 H4 S 0 3) gives the diimine adduct ImN-CH2CH2-NIm • 2 HX (12) from which the diimine ImN-CH2CH2-NIm (13) is obtained on treatment with KH. 13 reacts with (C6H5CN)2PdCl2 (15) to give the chelate complex (ImN-CH2CH2-NIm)PdCl2 (16). The X-ray structures of 12 and 16 are reported. | | |
Reference
| Z. Naturforsch. 53b, 997—1003 (1998); eingegangen am 2. Juni 1998 | | |
Published
| 1998 | | |
Keywords
| Imines, Palladium, Chelates, Ligand Effects, X-Ray Data | | |
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| default:Reihe_B/53/ZNB-1998-53b-0997.pdf | | | Identifier
| ZNB-1998-53b-0997 | | | Volume
| 53 | |
19 | Author
| N. Orbert, K. Uhn, M. Anfred, Steim Ann, Gerd Weyers, Herrn | Requires cookie* | | Title
| Synthese und Eigenschaften von l,3-Diisopropyl-4,5-dimethylimidazolium- 2-car boxy lat. Ein stabiles Carben-Addukt des Kohlendioxids [1]  | | | Abstract
| The reaction of 2,3-dihydro-l,3-diisopropyl-4,5-dimethylimidazol-2-ylidene (5) with C 0 2 gives the imidazolium-2-carboxylate 6 . The compound can be transformed into the salts of its corresponding Broenstedt acid 8 . The cationic acid chloride 10a is obtained from 6 and thionyl chloride. Chemical properties and spectroscopic data indicate 6 to be less basic than its anionic counterparts, e. g. PhC02 . The X-ray structure of | | |
Reference
| Z. Naturforsch. 54b, 427—433 (1999); eingegangen am 27. November 1998 | | |
Published
| 1999 | | |
Keywords
| Carbenes, Imidazoles, Carboxylic Acids, X-Ray Data | | |
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| default:Reihe_B/54/ZNB-1999-54b-0427.pdf | | | Identifier
| ZNB-1999-54b-0427 | | | Volume
| 54 | |
20 | Author
| Norbert Kuhn, Manfred Steimann3, Gerd Weyers3, Gerald Henkelh, Herrn | Requires cookie* | | Title
| l,3-DHSopropyl-4,5-dimethylimidazolium-2-N,N'-diisopropylamidinat, ein neuartiges Retain [1] 1,3-Diisopropyl-4,5-dimethylimidazolium-2-N,N'-diisopropylamidinate, a Novel Betaine [1]  | | | Abstract
| The imidazolium-2-amidinate 6 is obtained from the reaction of 2,3-dihydro-1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene (4) with diisopropylcarbodiimide (5) as stable solid. Overcrow ding causes a lowered symmetry of the amidinate fragment indicated both by structural and NMR data. The strongly basic properties of 6 allow facile protonation with HC1 to the cationic amidine derivatives 7 and 8 . The ketoamidine 10 is formed by a ring opening reaction of 6 with water. I he X-ray structures of 6 and 10 are reported | | |
Reference
| Z. Naturforsch. 54b, 434—440 (1999); eingegangen am 21. Dezember 1998 | | |
Published
| 1999 | | |
Keywords
| Amidines, Carbenes, Carbon Diimides, Imidazoles, X-Ray Data | | |
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| default:Reihe_B/54/ZNB-1999-54b-0434.pdf | | | Identifier
| ZNB-1999-54b-0434 | | | Volume
| 54 | |
|